CN214837326U - Fan outlet sealing surrounding belt fixing device - Google Patents
Fan outlet sealing surrounding belt fixing device Download PDFInfo
- Publication number
- CN214837326U CN214837326U CN202120473045.6U CN202120473045U CN214837326U CN 214837326 U CN214837326 U CN 214837326U CN 202120473045 U CN202120473045 U CN 202120473045U CN 214837326 U CN214837326 U CN 214837326U
- Authority
- CN
- China
- Prior art keywords
- fan
- fixing device
- shroud
- belt
- surrounding belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The embodiment of the utility model provides a fan export seals shroud fixing device, this fan export seals shroud fixing device is including the steel band that is applicable to sealed shroud periphery, and wherein, fixing device is still including installing the locating part on the export wind channel of fan, and the locating part is located the front side along the wind current direction of steel band during fan running state, sealed shroud receives the wind pressure effect and locating part butt. The limiting piece is arranged on the front side of the outlet air duct of the fan along the wind flow direction, so that the sealing surrounding belt can be axially fixed, and the sealing surrounding belt is prevented from axially moving towards the front side of the wind flow direction under the action of wind pressure of wind flow.
Description
Technical Field
The application relates to the technical field of axial flow fans with adjustable moving blades, in particular to a fixing device for a sealing shroud ring at an outlet of a fan.
Background
The axial flow fan with adjustable moving blades is an important device of a boiler air smoke system of a thermal power plant, and mainly converts mechanical energy of a motor into pressure energy and kinetic energy of gas to provide air required by boiler combustion and cold air and hot air required by a coal pulverizing system for conveying and heating coal powder. The stable operation of the axial flow fan with the adjustable moving blades is of great importance to a power plant boiler system. If the axial flow fan with the adjustable moving blades cannot stably operate, the boiler of the power plant cannot convert chemical energy of fuel into heat energy of steam through combustion, and a generator set is forced to stop operation, so that great loss is brought, and the consequence is serious.
The existing axial flow fan with adjustable moving blades mainly adopts a butt joint connection mode with an outlet air duct, and the outer diameter of the fan shell is larger than that of the outlet air duct. When the fan operates, the sealing shroud at the periphery of the connection part of the fan shell and the outlet air duct can move towards the direction of the air outlet under the action of air pressure generated by axial air flow, the condition that the sealing shroud is blown away in the operation of the fan occurs, the fan stops operating, and a safe operation event of a generator set is caused.
Based on the above-mentioned defect that prior art exists, need urgently to provide a scheme, solve the fan when the operation, sealed shroud receives the wind pressure effect axial displacement easily blow open's problem.
SUMMERY OF THE UTILITY MODEL
Because prior art has above-mentioned problem, the embodiment of the utility model provides a fan export seals shroud fixing device.
Specifically, the embodiment of the utility model provides a following technical scheme:
an embodiment of the utility model provides a fan export seal shroud fixing device, including being applicable to the steel band of seal shroud periphery, wherein, fixing device is still including installing the locating part on the export wind channel of fan, the locating part is located the front side along the wind current direction of steel band during the fan running state, seal shroud wind pressure effect with the locating part butt.
Further, sealed shroud includes wide shroud and narrow shroud, the narrow shroud sets up the one end of being connected with fan casing in export wind channel, the narrow shroud the wide shroud with the steel band is followed the radial from inside to outside in export wind channel arranges in proper order.
Further, the limiting part is an annular limiting baffle, and when the fan is in the running state, the steel belt, the wide surrounding belt and the narrow surrounding belt are abutted to the annular limiting baffle.
Further, the narrow shroud cladding is in the export wind channel with the one end head portion that the fan casing is connected, one side of narrow shroud with the top butt of fan casing, another side when the fan running state, with locating part butt.
Further, the annular limiting baffle is fixedly installed on the outlet air duct in a welding mode.
Furthermore, the annular limiting baffle is made of angle steel, and the contact surface of the angle steel and the outlet air duct is provided with a uniform cutting seam at an interval of 200 mm.
Further, the width of a gap formed by the angle steel and a contact surface cutting seam of the outlet air duct is 5 mm.
Further, the clearance between the contact surface of the annular limiting baffle and the outlet air duct is smaller than or equal to 1 mm.
Further, the steel belt and the limiting piece are of an integral structure, and the sealing surrounding belt is installed in a semi-closed cavity formed by the steel belt and the limiting piece.
Further, the fan is a movable blade adjustable axial flow primary fan, the rotating speed of the fan is 1470r/min, and the diameter of the impeller is 1470r/min
The number of blades of each stage is 24, and the diameter and the stroke of the hydraulic cylinder are
According to the above technical scheme, the embodiment of the utility model provides a fan export seals shroud fixing device, to the adjustable axial fan of movable blade of prior art when the operation, sealed shroud receives the problem that wind pressure effect axial displacement is easily blown open, the fixing device who can be used to fan export seals shroud is proposed, this fixing device is including the steel band that is applicable to sealed shroud periphery and the locating part of installing on the export wind channel of fan, this locating part is located the front side along the wind current direction of steel band, when fan running state, sealed shroud receives wind pressure effect and locating part butt. The limiting piece is arranged on the front side of the outlet air duct of the fan along the wind flow direction, so that the sealing surrounding belt can be axially fixed, and the sealing surrounding belt is prevented from axially moving towards the front side of the wind flow direction under the action of wind pressure of wind flow. The axial flow fan with the adjustable movable blades can be ensured to normally operate, and meanwhile, the factor that the sealing surrounding belt at the outlet of the fan is easy to blow away and leak air is thoroughly eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art fan outlet seal shroud mounting arrangement;
fig. 2 is a schematic structural view of a fan outlet sealing shroud fixing device disclosed in an embodiment of the present invention;
description of reference numerals:
1-a fan casing; 2-wide surrounding belt; 3-a steel belt; 4-narrow surrounding band; 5-an outlet air duct; 6-a limiting part;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Fig. 1 is a schematic view of a mounting structure of a fan outlet sealing shroud in the prior art. Referring to fig. 1, a fan casing 1 and an outlet air duct 5 of the axial flow fan with adjustable moving blades mainly adopt a butt joint connection mode, in order to realize the sealing connection of the fan casing 1 and the outlet air duct 5, the periphery of the joint of the fan casing 1 and the outlet air duct 5 is sealed by a sealing surrounding belt made of foamed rubber, and a steel belt fixing structure is additionally arranged on the periphery of the sealing surrounding belt. The outer diameter of the fan shell 1 is larger than that of the outlet air duct 5. The wind generated by the axial flow fan with adjustable moving blades flows out of the fan casing 1 and then flows into the outlet duct 5, and the direction indicated by the arrow in fig. 1 indicates the wind flow direction.
In fig. 1, because the outer diameter of the outlet air duct 5 is smaller than the outer diameter of the fan housing 1, the wind in the fan housing 1 can generate an axial wind pressure effect on the end of the outlet air duct 5 abutting against one end of the fan housing 1. When the fan is in a running state, wind generated by fan conversion can continuously generate a wind pressure effect on the outlet air duct 5, and under the continuous wind pressure effect, the outlet air duct 5 can axially move along the wind flow direction, so that the sealing shroud is blown away, and the fan is stopped.
Fig. 2 is the utility model discloses a fan export seals shroud fixing device's schematic structure diagram. As shown in fig. 2, a fixing device for a sealing shroud at an outlet of a fan includes a steel belt 3 adapted to an outer periphery of the sealing shroud, wherein the fixing device further includes a limiting member 6 installed on an outlet air duct 5 of the fan, the limiting member 6 is located at a front side of the steel belt 3 along an air flow direction (an arrow indicates a direction in the drawing), and when the fan is in an operating state, the sealing shroud is pressed by air and abuts against the limiting member 6.
Specifically, the periphery of the joint of the fan casing 1 and the outlet air duct 5 is sequentially provided with a sealing surrounding belt and a steel belt 3 from inside to outside, and the steel belt 3 is circumferentially attached to the sealing surrounding belt, so that the sealing effect of the sealing surrounding belt is ensured. When the fan is in a running state, the front side surfaces of the sealing surrounding belt and the steel belt 3 in the wind flow direction are abutted against the limiting part 6. Under the running state of the fan, because the outlet air duct is subjected to partial pressure action and moves axially, the sealing surrounding belt can drive the steel belt 3 to move towards the front side of the air flow direction along the axial direction, the movement of the sealing surrounding belt and the steel belt 3 can be effectively blocked through the limiting part 6 fixed on the outlet air duct 5, and the sealing effect of the sealing surrounding belt on the fan shell 1 and the outlet air duct 5 is ensured.
It should be noted that the limiting member 6 is installed on the outlet air duct 5 by a fixed connection manner, such as welding, bolting, etc., and any connection manner that can realize stable installation of the limiting member 6 can be applied to the embodiment of the present invention.
As shown in fig. 1 and fig. 2, the sealing surrounding belt in the embodiment of the present invention includes a wide surrounding belt 2 and a narrow surrounding belt 4, the narrow surrounding belt 4 is disposed at one end of the outlet air duct 5 connected to the fan housing 1, and the narrow surrounding belt 4, the wide surrounding belt 2 and the steel belt 3 are sequentially arranged from inside to outside along the radial direction of the outlet air duct 5.
Preferably, the narrow surrounding belt 4 is wrapped at one end head portion of the air duct outlet 5 connected with the fan casing 1, one side edge of the narrow surrounding belt 4 is abutted to the top end of the fan casing 1, and the other side edge is abutted to the limiting part 6 when the fan is in an operating state.
Specifically, describing in the orientation of the illustrated structure, the limiting member 6 divides the outlet duct 5 into two parts, including a head part located on the left side of the limiting member 6 and a tail part located on the right side of the limiting member 6. Narrow shroud 4 sets up in the head of export wind channel 5, and the thickness of this narrow shroud 4 is export wind channel 5 external diameter length and fan casing 1 export external diameter length difference's half, guarantees that 2 inboards of wide shroud and fan casing 1 and the smooth laminating in the narrow shroud 4 outside. In the embodiment of the utility model provides an in, the external diameter length in export wind channel 5 is 2000 mm.
Preferably, the limiting part 6 is an annular limiting baffle, and the steel belt 3, the wide surrounding belt 2 and the narrow surrounding belt 4 are abutted to the annular limiting baffle in the running state of the fan.
Be annular limit baffle with locating part 6 design, can guarantee that the fan when the running state, the circular side of steel band 3, wide shroud 2 and narrow shroud 4 is even with locating part 6 butt, avoids non-annular locating part 6 to produce inhomogeneous pressure effect, the sealed effect of influence sealed shroud to the outside of steel band 3, wide shroud 2 and narrow shroud 4.
Preferably, the annular limit baffle is fixedly mounted on the outlet duct 5 in a welded manner. In consideration of the convenience of operation and the stability of the operation of the movable blade adjustable axial flow fan, the annular limiting baffle is preferably fixed on the outlet air duct in a welding manner, so that the stability of the operation of the movable blade adjustable axial flow fan is ensured.
Preferably, the annular limiting baffle is made of angle steel, the vertical face of the annular limiting baffle made of the angle steel is smooth, the annular limiting baffle can be tightly attached to the side faces of the steel belt 3, the wide surrounding belt 2 and the narrow surrounding belt 4, the air leakage problem is avoided, and the sealing effect is improved.
Preferably, the contact surface of the angle steel and the outlet air duct 5 is evenly slit. The angle steel can be bent into a circular arc in a mode of uniformly cutting the angle steel, so that the angle steel is attached to the periphery of the outlet air duct 5. In practical application, the contact surface of the angle steel and the outlet air duct 5 can be uniformly slit at an interval of 200mm, and the width of a slit formed by the slit can be 5 mm.
Preferably, the clearance between the contact surface of the annular limiting baffle and the outlet air duct 5 is less than or equal to 1 mm. When the clearance between annular limit baffle and the export wind channel 5 is greater than 1mm, the problem of leaking can appear, influences the availability factor of fan, controls the clearance between annular limit baffle and the export wind channel 5 within 1mm, then can effectually avoid the problem of leaking out to appear, guarantees the availability factor of fan.
Preferably, the steel band 3 and the limiting member 6 are of an integral structure, and the sealing shroud is installed in a semi-closed cavity formed by the steel band 3 and the limiting member 6.
Specifically, in the structural diagram of the fixing device shown in fig. 2, the steel strip 3 and the limiting member 6 are in a separated structure when the fan is in a non-operating state, that is, the steel strip 3 and the limiting member 6 are not connected. As an alternative to the embodiment of fig. 2, the steel strip 3 and the limiting member 6 may be an integral structure, that is, the state between the steel strip 3 and the limiting member 6 is not changed in the fan operating state and the non-operating state, and both are in the l-type connection state. The wide and narrow shrouds 2 and 4 are mounted in a semi-closed chamber of "" type. The fixing means in this alternative may achieve the same blocking effect as the fixing means shown in fig. 2.
Preferably, the fan in the embodiment of the present invention may be a primary axial flow fan with adjustable moving blades, and the specific parameters of the fan are as follows in table 1:
table 1:
it should be noted that, the fan in the embodiment of the above utility model can be the adjustable axial compressor primary fan of movable blade that is used for power boiler, also can be for the adjustable axial fan of movable blade that is used for the mine. The embodiment of the utility model provides a fixing device simple structure, the good reliability, convenient operation has stronger portability and scalability.
The embodiment of the utility model provides a fan export seals shroud fixing device, to the adjustable axial fan of movable vane of prior art when the operation, sealed shroud receives the problem that wind pressure effect axial displacement is easily blown open, the fixing device who can be used to fan export seals shroud is proposed, this fixing device is including steel band 3 that is applicable to sealed shroud periphery and the locating part 6 of installing on the export wind channel 5 of fan, this locating part 6 is located the front side along the wind current direction of steel band 3, when fan running state, sealed shroud receives wind pressure effect and locating part 6 butt. The limiting piece 6 is arranged on the front side of the outlet air duct 5 of the fan along the wind flow direction, so that the sealing surrounding belt can be axially fixed, and the sealing surrounding belt is prevented from axially moving towards the front side of the wind flow direction under the action of wind pressure of wind flow. The utility model discloses fixing device, sealed shroud can receive the dual fixed action of 3 radial forces of steel band and 6 axial forces of locating part simultaneously, when guaranteeing the adjustable axial fan normal operating of movable vane, will lead to the factor thoroughly elimination that the sealed shroud of fan export easily blows off the hourglass wind.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a fan export seals shroud fixing device, is including being applicable to steel band (3) of sealed shroud periphery, its characterized in that, fixing device is still including installing locating part (6) on the export wind channel (5) of fan, locating part (6) are located the front side along the wind current direction of steel band (3) during the fan running state, sealed shroud receive the wind pressure effect with locating part (6) butt.
2. The fixing device according to claim 1, wherein the sealing surrounding belt comprises a wide surrounding belt (2) and a narrow surrounding belt (4), the narrow surrounding belt (4) is arranged at one end of the outlet air duct (5) connected with the fan casing (1), and the narrow surrounding belt (4), the wide surrounding belt (2) and the steel belt (3) are sequentially arranged from inside to outside along the radial direction of the outlet air duct (5).
3. The fixing device according to claim 2, characterized in that the limiting member (6) is an annular limiting baffle, and the steel belt (3), the wide shroud (2) and the narrow shroud (4) abut against the annular limiting baffle in the operating state of the fan.
4. The fixing device according to claim 2, wherein the narrow surrounding belt (4) is wrapped around an end of the outlet air duct (5) connected to the fan casing (1), one side of the narrow surrounding belt (4) abuts against a top end of the fan casing (1), and the other side abuts against the limiting member (6) when the fan is in an operating state.
5. A fixing device according to claim 3, characterized in that the annular limit stop is fixedly mounted on the outlet duct (5) by welding.
6. A fixing device according to claim 3, characterized in that the annular limit baffle is made of angle steel, and the contact surface of the angle steel and the outlet duct (5) is evenly slit with a gap of 200 mm.
7. A fixing device according to claim 6, characterized in that the width of the gap formed by the cutting of the angle steel and the contact surface of the outlet duct (5) is 5 mm.
8. A fixing device according to claim 6, characterized in that the gap between the contact surface of the annular limiting baffle with the outlet duct (5) and the outlet duct (5) is less than or equal to 1 mm.
9. The fixing device according to claim 1, wherein the steel belt (3) and the limiting member (6) are of an integral structure, and the sealing shroud is installed in a semi-closed cavity formed by the steel belt (3) and the limiting member (6).
10. The fixing device of claim 1, wherein the fan is a primary axial flow fan with adjustable moving blades, the rotating speed of the fan is 1470r/min, and the diameter of the impeller is 1470r/min
The number of blades of each stage is 24, and the diameter and the stroke of the hydraulic cylinder are
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120473045.6U CN214837326U (en) | 2021-03-04 | 2021-03-04 | Fan outlet sealing surrounding belt fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120473045.6U CN214837326U (en) | 2021-03-04 | 2021-03-04 | Fan outlet sealing surrounding belt fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837326U true CN214837326U (en) | 2021-11-23 |
Family
ID=78884703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120473045.6U Active CN214837326U (en) | 2021-03-04 | 2021-03-04 | Fan outlet sealing surrounding belt fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837326U (en) |
-
2021
- 2021-03-04 CN CN202120473045.6U patent/CN214837326U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2662039C (en) | Turbine shroud gas path duct interface | |
| JP5227114B2 (en) | Labyrinth compression seal and turbine incorporating it | |
| JP5879084B2 (en) | Turbomachine seal assembly | |
| US20070273104A1 (en) | Abradable labyrinth tooth seal | |
| KR19990045144A (en) | High Pressure Rotor Brush Seals | |
| CN111720175B (en) | Impeller machinery movable vane top seal structure | |
| CN103512046A (en) | Transition duct for a gas turbine | |
| JP2015535565A (en) | Turbine shroud mounting and sealing configuration | |
| CN103998722A (en) | Axial flow compressor tip clearance control by axial shift of rotor | |
| US8608424B2 (en) | Contoured honeycomb seal for a turbomachine | |
| US20120128472A1 (en) | Turbomachine nozzle segment having an integrated diaphragm | |
| CN214837326U (en) | Fan outlet sealing surrounding belt fixing device | |
| CN107100677A (en) | A kind of nozzle ring assemblies of fixed blade and adjustable vane combination | |
| CN212671868U (en) | Impeller machinery movable vane top seal structure | |
| CN111441827B (en) | Closed centripetal turbine wheel cover-casing cavity structure for inhibiting leakage loss | |
| CA2975693A1 (en) | Turbine shroud segment | |
| JP2015121217A (en) | Axially faced seal system | |
| EP2672065B1 (en) | Turbine shroud | |
| JP3958728B2 (en) | Gas turbine combustor structure | |
| WO2019013178A1 (en) | Turbo machine | |
| JP2011089508A (en) | Turbine exhaust structure | |
| JP2017116184A (en) | gas turbine | |
| CN114198340B (en) | SCR dilution fan that can start fast | |
| CN209800031U (en) | Labyrinth seal system and aeroengine | |
| CN216642578U (en) | Axial compressor casing and axial compressor using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |