CN207701461U - Variable speed Silence Process axial flow blower coupling structure - Google Patents
Variable speed Silence Process axial flow blower coupling structure Download PDFInfo
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- CN207701461U CN207701461U CN201721727839.0U CN201721727839U CN207701461U CN 207701461 U CN207701461 U CN 207701461U CN 201721727839 U CN201721727839 U CN 201721727839U CN 207701461 U CN207701461 U CN 207701461U
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- key pin
- main shaft
- variable speed
- coupling structure
- axial flow
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Abstract
The utility model provides a kind of variable speed Silence Process axial flow blower coupling structure, and the variable speed Silence Process axial flow blower coupling structure includes：It is inserted into key pin in the multiple key pin holes and the insertion key pin hole that are arranged on the combination circumference of draught fan impeller hub centre hole and main shaft.The utility model can solve the deficiency of the interference fit connecting modes such as connecting mode and rectangular section key of current generally use, improve the security reliability of fan operation, avoid the rehabilitation expense because of the air-introduced machine repairing maintenance expenses and impeller, main shaft brought more.
Description
Technical field
The utility model be about variable speed Silence Process axial flow blower technology, can especially with regard to a kind of variable speed stator blade
Adjust axial flow blower coupling structure.
Background technology
Air-introduced machine is heat power plant boiler major pant item equipment, and the reliability of operation conditions directly affects generating set
Safe operation.Thermal power plant's air-introduced machine mostly uses greatly motor driving at present, with the development of technology, draws by small turbine driving
Wind turbine technology is also gradually used widely.
Existing supercritical unit uses the Silence Process axial id fan of small turbine drive, draught fan impeller wheel hub and main shaft
Between torque transmitted by interference fit type, while wheel hub being fixed on main shaft by impeller gland and axle sleeve.Because of wind turbine leaf
Grinding wheel press cap bolt looseness, impeller hub are easy to happen opposite sliding with main shaft, and the fracture of impeller gland bolt may result in and cause
Fan vibration faults frequent occurs.
Opposite sliding occurs from impeller hub and main shaft, from the point of view of the analysis of impeller gland bolt crack conditions, due to impeller wheel
Connection structure design is unreasonable between hub and main shaft, and cooperation clamp force design is less than normal, causes to occur between draught fan impeller wheel hub and main shaft
Opposite sliding, and the opposite operation odjective cause slided is caused usually to have：
Air-introduced machine frequent variable speed operation causes between impeller hub and main shaft torsion ceaselessly change to cause abrasion loosening；
Flue gas by between frequency and draught fan impeller intrinsic frequency there are covibration, wind when wind turbine passes through interval of resonance daily
Machine vibration increases, and causes to loosen and wear between impeller hub and main shaft；
Impeller is dismantled because fan trouble overhauls, during impeller demolition, is often worn out again between impeller hub and main shaft.Together
When, it usually requires to be processed by shot blasting impeller hub center and main shaft before impeller installation, so as to cause between centre bore and main shaft
Interference volume is gradually reduced, sometimes even so that become clearance fit between impeller center hole and main shaft, and exacerbate impeller center hole with
It is worn between main shaft.
Therefore, the Silence Process axial flow blower because between impeller hub centre bore and main shaft connection structure design it is unreasonable, no
It is suitble to frequent variable speed operating condition.
To solve the above-mentioned problems, the prior art by impeller center hole and main shaft according to Interference Fit Design, profit when installation
With the thermal expansion and contraction principle of material, makes the expansion of hub centre hole to generate installation gap, formed both when being cooled to room temperature
Interference fit, realizes the transmission of torque.But there are following disadvantages for the technology：
Wind turbine such as conveys high-temperature medium in Special use occasion and uses such connecting mode, and key is the choosing of interference volume
It takes.Interference volume is excessive to bring difficulty to installation and dismounting, and easily causes the two mating surface and generate plasticity change because of excessive compression
Shape；And too small can deposit causes to coordinate because of the factors such as the effect of centrifugal force and unlike material coefficient of thermal expansion difference at runtime
It loosens, causes fan vibration abnormal, or even threaten the safe operation of wind turbine.
The maximum tangential stress σ t that impeller is born when fan operation are in inner radius, and the tangential stress σ t at any radius are total
Corresponding radial stress σ r are greater than, the rotor of elastic conjunction is in the running due to the effect of the factors such as quality centrifugal force, wheel
Hub bore diameter and main shaft outer diameter increase and to some extent, and this variation would be possible to that original interference volume is caused to disappear, at this time
Radial stress σ ri=0, hole and the mutual extruding force of axis are zero, loosen each other, cause to produce between impeller and axis in operational process
Raw relative motion, influences the safe operation of wind turbine.
Wind turbine Disintegration overhaul needs to carry out sanding and polishing to the main shaft of corrosion before returning dress, by multiple sanding and polishing
Afterwards, the main shaft diameter of axle can reduce, and reduce so as to cause the interference volume of rear-wheel hub aperture and main shaft outer diameter and even disappear, so as to cause wind
The relative motion that impeller and main shaft are generated in machine operation, influences the safe operation of wind turbine.
To solve the above-mentioned problems, the prior art proposes the side that impeller hub passes through rectangular section key connecting with main shaft
Formula, main shaft transmit torque to impeller by rectangular section key, to drive draught fan impeller to rotate.It must be especially when the Technology design
Pay attention to selected and main shaft, bond strength the check of hub material.Hub material or main shaft, bond strength selection is improper can all cause wind
Safety accident occurs in machine operation.In addition to this, due to being provided with rectangular section keyway on wheel hub and main shaft, to a certain extent
Reduce the intensity of wheel hub and main shaft.The right angle position of especially keyway belongs to area of stress concentration, is easiest to produce in fan operation
It gives birth to stress concentration and cracks.The output of the especially wind turbine of Steam Turbine Driven, wind turbine is adjusted mainly by the rotating speed of steam turbine
The frequent variation of section, turbine speed is easier that the keyway area of stress concentration of main shaft and wheel hub is caused to generate alternate stress, to
Promote the cracking frequency higher of main shaft and wheel hub, security reliability poor.
Utility model content
The utility model provides a kind of variable speed Silence Process axial flow blower coupling structure, avoid because impeller hub with
The opposite sliding problem that interference volume between main shaft is insufficient and occurs.
To achieve the goals above, the utility model embodiment provides a kind of variable speed Silence Process axial flow blower connection
Structure, the variable speed Silence Process axial flow blower coupling structure include：It is arranged in draught fan impeller hub centre hole and main shaft
In conjunction with multiple key pin holes on circumference and the key pin in the insertion key pin hole.
In one embodiment, the number in the key pin hole is three.
In one embodiment, the circular arc of the combination circumference is divided equally in the key pin hole.
The corresponding key pin hole portion in draught fan impeller hub centre hole is divided into through-hole, the corresponding key pin bore portion of the main shaft
Depth be 40mm.
In one embodiment, the shape of key pin hole cross section is round, ellipse or rectangle.
In one embodiment, the outer diameter of the main shaft is 190.03mm, and the aperture of wheel hub is 189.99mm.
The utility model can solve the connections sides such as interference fit connecting mode and the rectangular section key of current generally use
The deficiency of formula improves the security reliability of fan operation, avoids because of the air-introduced machine repairing maintenance expense brought and impeller, master more
The rehabilitation expense of axis.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the variable speed Silence Process axial flow blower coupling structure of the utility model embodiment；
Fig. 2 is the schematic diagram of the key pin bore portion of the draught fan impeller wheel hub of the utility model embodiment；
Fig. 3 A are the diagrammatic cross-section of the key pin bore portion of the main shaft of the utility model embodiment；
Fig. 3 B are the schematic cross-section of the key pin bore portion of the main shaft of the utility model embodiment.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram of the variable speed Silence Process axial flow blower coupling structure of the utility model embodiment, should
Variable speed Silence Process axial flow blower coupling structure includes：Combination in the centre bore 1 and main shaft 2 of draught fan impeller wheel hub 4 is set
(key pin is slotting in Fig. 1 for multiple key pin holes 3 on circumference (minimum circumference as shown in the figure) and the key pin in insert key pin hole
Enter key pin hole).In Fig. 1,5 be blade.
The number in key pin hole 1 is at least 2, can specifically be set according to actual conditions, in the utility model only with
The number in key pin hole is three and illustrates, and is not intended to limit.
Due on the combination circumference of 3 centrally disposed hole 1 of key pin hole and main shaft 2, thus centre bore 1 on main shaft 2
With key pin bore portion.In one embodiment, the corresponding key pin hole portion in draught fan impeller hub centre hole is divided into through-hole, and main shaft is corresponding
Key pin bore portion is not through-hole, and depth can be 40mm.
The shape of key pin hole cross section can be round or oval, and the application is not limited.In Fig. 1, variable speed
Silence Process axial flow blower coupling structure is divided equally cylinder key pin with main shaft circumference three using the centre bore of draught fan impeller wheel hub and is coupled
Draught fan impeller wheel hub is connected by mode by key pin with main shaft, and key pin hole is that cross section is circle, circular a diameter of
40mm。
It is executed when it is implemented, the centre bore of draught fan impeller wheel hub coordinates with main shaft fit tolerance according to H7/k6 transition, it is main
The roughness of axis is by 1.6 or 3.2 processing, and the specifications and models of key pin can be 39.9 × 40mm of φ, and material can be No. 45 steel.
In one embodiment, the outer diameter of the main shaft is 190.03mm, and the aperture of wheel hub is 189.99mm.
Fig. 2 is the schematic diagram of the key pin bore portion of the draught fan impeller wheel hub of the utility model embodiment, draught fan impeller wheel hub
The corresponding key pin bore portion 31 of centre bore is 3, and key pin bore portion 31 divides equally the circular arc portion of centre bore, i.e., per adjacent 2 keys
The corresponding angle of the circular arc of pin hole circumferentially is 120 °.
Fig. 3 A are the diagrammatic cross-section of the key pin bore portion of the main shaft of the utility model embodiment；Fig. 3 B are the utility model
The schematic cross-section of the key pin bore portion of the main shaft of embodiment.As shown in Fig. 3 A and Fig. 3 B, the depth of the key pin bore portion 32 of main shaft
Degree is 40mm, and diameter is also 40mm.
The utility model can solve the connections sides such as interference fit connecting mode and the rectangular section key of current generally use
The deficiency of formula improves the security reliability of fan operation, avoids because of the air-introduced machine repairing maintenance expense brought and impeller, master more
The rehabilitation expense of axis.
The utility model is the optimization and improvement of the connecting mode to draught fan impeller wheel hub and main shaft, draught fan impeller wheel hub and
The size of main shaft remains unchanged, after the connecting mode after the optimization, during fan operation, and main shaft and draught fan impeller wheel hub
Torque drive, which relies primarily on, is distributed in three cylinder key pins of circumference to realize, avoids because of the mistake between impeller hub and main shaft
The opposite sliding problem that the amount of being full of is insufficient and occurs, improves the security reliability of fan operation, avoids because of air-introduced machine repairing mostly band
The rehabilitation expense of the maintenance expense and impeller, main shaft come.Meanwhile it also avoiding using rectangular section key using the keyway of circular hole
Problem of stress concentration caused by slot has preferable value for applications.
Specific embodiment is applied in the utility model to be expounded the principles of the present invention and embodiment, with
The explanation of upper embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for this field
Those skilled in the art, according to the thought of the utility model, there will be changes in the specific implementation manner and application range, comprehensive
Upper described, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. a kind of variable speed Silence Process axial flow blower coupling structure, which is characterized in that the variable speed Silence Process axis stream wind
Machine coupling structure includes：Multiple key pin holes and the insertion being arranged on the combination circumference of draught fan impeller hub centre hole and main shaft
Key pin in the key pin hole.
2. variable speed Silence Process axial flow blower coupling structure according to claim 1, which is characterized in that the key pin hole
Number be three.
3. variable speed Silence Process axial flow blower coupling structure according to claim 1, which is characterized in that the key pin hole
The respectively circular arc of the combination circumference.
4. variable speed Silence Process axial flow blower coupling structure according to claim 1, which is characterized in that the wind turbine leaf
The corresponding key pin hole portion in wheel hub centre hole is divided into through-hole, and the depth of the corresponding key pin bore portion of the main shaft is 40mm.
5. variable speed Silence Process axial flow blower coupling structure according to claim 1, which is characterized in that the key pin hole
The shape of cross section is round or oval.
6. variable speed Silence Process axial flow blower coupling structure according to claim 1, which is characterized in that the main shaft
Outer diameter is 190.03mm, and the aperture of wheel hub is 189.99mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727839.0U CN207701461U (en) | 2017-12-13 | 2017-12-13 | Variable speed Silence Process axial flow blower coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727839.0U CN207701461U (en) | 2017-12-13 | 2017-12-13 | Variable speed Silence Process axial flow blower coupling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207701461U true CN207701461U (en) | 2018-08-07 |
Family
ID=63025810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721727839.0U Expired - Fee Related CN207701461U (en) | 2017-12-13 | 2017-12-13 | Variable speed Silence Process axial flow blower coupling structure |
Country Status (1)
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| CN (1) | CN207701461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417147A (en) * | 2019-05-20 | 2019-11-05 | 天津市天发重型水电设备制造有限公司 | A kind of improved rotor field spider hot jacket assembling structure |
-
2017
- 2017-12-13 CN CN201721727839.0U patent/CN207701461U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417147A (en) * | 2019-05-20 | 2019-11-05 | 天津市天发重型水电设备制造有限公司 | A kind of improved rotor field spider hot jacket assembling structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20181213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |