CN204041506U - A kind of power plant fans anti kickback attachment - Google Patents
A kind of power plant fans anti kickback attachment Download PDFInfo
- Publication number
- CN204041506U CN204041506U CN201420415453.6U CN201420415453U CN204041506U CN 204041506 U CN204041506 U CN 204041506U CN 201420415453 U CN201420415453 U CN 201420415453U CN 204041506 U CN204041506 U CN 204041506U
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- CN
- China
- Prior art keywords
- ratchet
- power plant
- check device
- kickback attachment
- anti kickback
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- 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.)
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Abstract
The utility model provides a kind of power plant fans anti kickback attachment, for being arranged on outer gearing formula ratchet on the fan shaft between drive end axle bearing and coupling and being located at ground check pawl below ratchet.Mounting type has two kinds: when install anti-inversion organization is installed after coupling again time, can be set to being stuck on fan shaft two semicircular by ratchet, two semicircles forming ratchet are bolted; When coupling is not yet installed, anti-inversion organization is installed, can be by ratchet design one for overall, be directly socketed on fan shaft.The structure of the blower fan anti kickback attachment be made up of click is simple, manufactures, easy for installation, and use reliable, processing cost is low, to original equipment structure without the need to changing, grasps easy to operate, economical and practical.
Description
Technical field
The utility model belongs to anti-reversing technical field, particularly a kind of draught fan impeller anti kickback attachment.
Background technique
Primary air fan, provides the First air of certain pressure, certain flow, and coal dust is dry and send into burner, provides coal dust fugitive constituent to burn institute's calorific requirement.Be made up of motor, impeller, casing, inlet box, slip ring, pedestal, regulation and control system etc.
Heat power plant boiler primary air system is generally all equipped with two primary air fans, corresponding with air preheater, be arranged in boiler both sides, two Fans export the breeze doors are louver damper air door, two fan outlet air channels interconnect, composition boiler primary air system, and there is certain inleakage in off position in louver damper air door, can First air be caused to blow back into the side blower fan of stoppage in transit when blower fan single side runs, blow draught fan impeller counter-rotation, blower fan reverse speed can reach more than 100r/min, if start blower fan under such conditions to put into operation, motor can be made to cross moment start, burn motor or damage coupling, also fan shaft may be caused to twist off, blower fan is lost for subsequent use, cause equipment failure.When boiler ignition start or boiler at low load run, primary air fan all can be in one-sided operation, in order to ensure device security, prevent from not starting side draught fan impeller reversing, wooden unit folder wedge anti-rotation can also be adopted, during fan starting to fan shaft system, personnel are after receiving enabled instruction, to the timber wedge taking out anti-rotation on the spot in good time, this and " electric power safety working regulation " are not inconsistent, and there is certain personal hidden danger.
In addition, also can select electronic band-type brake, but electronic band-type brake need carry out targeted design, manufacture cost is high, and volume is large, and installing space is limited, and must have electric automatic control loop to coordinate the start and stop of blower fan, system complex, safety reliability is risky.
Model utility content
During in order to overcome boiler primary air system one-sided fan operation, reverse flowing of air flows enters to stop transport crosswind machine, blow stoppage in transit side draught fan impeller produce reversing and design draught fan impeller anti kickback attachment, have an accident to eliminate the reversing of fan starting draught fan impeller, the utility model provides a kind of structure simple, manufacture, easy for installation, use reliable, processing cost is low, to original equipment structure without the need to changing, easy to operate, economical and practical draught fan impeller anti kickback attachment, to ensure that blower fan normally starts under impeller state of rest.The utility model solves the technological scheme that its technical problem adopts, a kind of power plant fans anti kickback attachment, comprise: single-phase motion and the check device matched with single-phase motion, single-phase motion is arranged on the fan shaft between drive end axle bearing and coupling, check device is arranged on the ground below individual sport mechanism, wherein single-phase motion is socketed on fan shaft, and outer surface at least has a single-phase tooth that can be meshed with non-return mechanism, single-phase tooth is towards draught fan impeller reverses direction, in addition, the support be connected with ground can also be set, one end of non-return mechanism is connected with stand hinge, the distance of the connecting end distance non-return mechanism the other end end points of non-return mechanism is d, the connecting end of non-return mechanism is d ' apart from the minimum range on unidirectional tooth tooth limit, when non-return mechanism is positioned at primary importance, the other end of non-return mechanism inserts in the teeth groove of single-phase motion, d>d ', when non-return mechanism is positioned at the second place, the other end of non-return mechanism is away from single-phase motion.
Preferably, single-phase motion is outer gearing formula ratchet, the ratchet of ratchet is towards draught fan impeller reverses direction, check device is the check pawl engaged with ratchet, check pawl by bearing pin and support hinged, bearing pin arranges vibration damper with the bolt cap place of the bolt through bearing pin, and preferred vibration damper is spring washer.
In addition, can put platen, platen is arranged on ground, and support is fixedly connected with platen, and preferably, support can directly be welded on platen.
When installing anti-inversion organization after installing coupling again, can be set to being stuck on fan shaft two semicircular by ratchet, two semicircles forming ratchet are bolted.
When coupling is not yet installed, anti-inversion organization is installed, can be by ratchet design one for overall, be directly socketed on fan shaft.
The beneficial effects of the utility model are, structure is simple, manufacture, easy for installation, and use reliable, processing cost is low, to original equipment structure without the need to changing, easy to operate, economical and practical.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, primary air fan impeller anti kickback attachment described in the utility model is specifically described.
Fig. 1 is the utility model mounting point schematic diagram;
Fig. 2 is the structural representation of the utility model click
Fig. 3 is the design diagram of the utility model ratchet;
Fig. 4 is the design diagram of the utility model ratchet;
Fig. 5 is the design diagram of the utility model platen;
Fig. 6 is the design diagram of the utility model bearing pin;
Fig. 7 is the design diagram of the utility model support;
Fig. 8 is the structural representation of the utility model ratchet length.
Attached number in the figure illustrates: 1-anti kickback attachment, 2-fan shaft, 3-coupling, 4-drive end axle bearing, 5-fan body, 6-motor, 7-non-driven-end bearing seat, 101-outer gearing formula ratchet, 102-check pawl, 103-support, 104-bearing pin, 105-platen, 106-spring washer, 107-hex head bolt, the single-phase tooth of 108-, the connecting end of d-non-return mechanism is apart from the distance of non-return mechanism the other end end points, and the connecting end of d '-non-return mechanism is apart from the minimum range on unidirectional tooth tooth limit.
Embodiment
As depicted in figs. 1 and 2, the structure of the power plant fans anti kickback attachment that the utility model provides is: be the check pawl impeller shaft between blower fan thrust box and coupling installing ratchet and adapt with it, check pawl is arranged on the platen immediately below ratchet, mounting bracket on platen, ratchet is fixed by the bearing pin on support.Ratchet can be placed in anti-inverted position when the situation that blower fan is out of service, when fan starting, due to the rotation of fan shaft, check pawl be pushed aside automatically, away from ratchet.Wherein, ratchet 101 uses 45 steel, thickness: 30mm; Hex head bolt 107 is M10 hexagon socket head cap screw, and grade is 8.8, band spring washer; Ratchet screw pairing processing, centre deviation is less than 0.02mm; Ratchet 102 uses 45 steel, thickness: 30mm; Support 103 uses 45 steel, thickness: 15mm; Bearing pin 104 uses 45 steel, wears the thin nut 4 of M16; The material of platen 105 is Q235.
The click mounting type arranged for anti-reversing and structure can be:
Embodiment 1, the installation of the anti-reversing ratchet of formula of cutting open:
After coupling is not installed, 1. will cut formula ratchet connecting bolt open to lay down, namely ratchet is split up into two semicircular, two the semicircle ratchets separated to being stuck on impeller shaft, ratchet ratchet, towards impeller reverses direction, installs connecting bolt, clamping bolt, ratchet split surface is combined closely, and gapless exists;
2. ratchet is connected with bearing pin bolt, is assembled into an entirety, then according to ratchet position, ratchet and ratchet are placed on engaging position, then by ratchet support and platen firm welding.Platen can be fixed according to the basic actual conditions of blower fan.
Embodiment 2, the installation of the anti-reversing ratchet of integrated type:
Before coupling is not installed, ratchet is uniformly heated to about 95 DEG C, is overlapped the appropriate location installing to impeller shaft fast, after then allowing it naturally cool to ambient temperature, can follow-up installment work be carried out.The installation of ratchet is with embodiment 1.
Anti kickback attachment application area: this device can be applicable to gas fan, the induced draught fan of power plant and may cause (as motor) on the rotating equipment of reversing.This device can with blower fan structure simultaneously Integral design, more can improve the Safety performance of blower fan.In addition, this device can the motor reel supporting with the rotating equipment reversed when preventing from starting be installed (or designing on motor).
Anti kickback attachment operation notice: ratchet must can be placed in anti-inverted position when blower fan is out of service, forbids, in the situation of impeller High Rotation Speed or reversing, ratchet is placed in anti-inverted position.
The above is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model, any technician being familiar with this patent is not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned prompting can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of the utility model scheme.
Claims (9)
1. a power plant fans anti kickback attachment, it is characterized in that, comprise: single-phase motion and the check device matched with described single-phase motion, described single-phase motion is arranged on the fan shaft (2) between drive end axle bearing (4) and coupling (3), and described check device is arranged on the ground below described single-phase motion.
2. power plant fans anti kickback attachment according to claim 1, it is characterized in that, described single-phase motion is socketed on described fan shaft (2), the outer surface of described single-phase motion at least has a single-phase tooth (108) that can be meshed with described check device, and described single-phase tooth (108) is towards draught fan impeller reverses direction.
3. power plant fans anti kickback attachment according to claim 2, it is characterized in that, also comprise the support (103) be connected with ground, one end of described check device and described support (103) chain connection, the connecting end of described check device is d apart from the distance of described check device the other end end points, the connecting end of described check device is d ' apart from the minimum range on described single-phase tooth (108) tooth limit
When described check device is positioned at primary importance, the other end of described check device inserts in the teeth groove of described single-phase motion, and d ' described in described d>;
When described check device is positioned at the second place, the other end of described non-return is away from described single-phase motion.
4. power plant fans anti kickback attachment according to claim 3, it is characterized in that, described single-phase motion is outer gearing formula ratchet (101), the ratchet of described ratchet (101) is towards draught fan impeller reverses direction, and described check device is the check pawl (102) engaged with described ratchet (101).
5. power plant fans anti kickback attachment according to claim 4, it is characterized in that, described check pawl (102) is hinged by bearing pin (104) and described support (103), and described bearing pin (104) arranges vibration damper with the bolt cap place of the bolt through described bearing pin (104).
6. power plant fans anti kickback attachment according to claim 5, is characterized in that, described vibration damper is spring washer (106).
7. power plant fans anti kickback attachment according to claim 3, is characterized in that, also comprise the platen (105) being arranged at ground, described support (103) is fixedly connected with described platen (105).
8. power plant fans anti kickback attachment according to claim 4, it is characterized in that, described ratchet (101) is that two semicircles forming described ratchet (101) are bolted to the two semicircular be stuck on described fan shaft (2).
9. power plant fans anti kickback attachment according to claim 4, is characterized in that, described ratchet (101) is overall structure, is socketed on described fan shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415453.6U CN204041506U (en) | 2014-07-25 | 2014-07-25 | A kind of power plant fans anti kickback attachment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415453.6U CN204041506U (en) | 2014-07-25 | 2014-07-25 | A kind of power plant fans anti kickback attachment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204041506U true CN204041506U (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420415453.6U Expired - Fee Related CN204041506U (en) | 2014-07-25 | 2014-07-25 | A kind of power plant fans anti kickback attachment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204041506U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762778A (en) * | 2016-12-06 | 2017-05-31 | 攀钢集团攀枝花钢钒有限公司 | For single supply air system of double pressure fan |
| CN109605760A (en) * | 2018-11-12 | 2019-04-12 | 芜湖市星东塑胶模具制品有限公司 | A kind of silencer pressing device |
-
2014
- 2014-07-25 CN CN201420415453.6U patent/CN204041506U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762778A (en) * | 2016-12-06 | 2017-05-31 | 攀钢集团攀枝花钢钒有限公司 | For single supply air system of double pressure fan |
| CN109605760A (en) * | 2018-11-12 | 2019-04-12 | 芜湖市星东塑胶模具制品有限公司 | A kind of silencer pressing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20150725 |
|
| EXPY | Termination of patent right or utility model |