CN2217128Y - Centrifugal draught fan rolling gear - Google Patents
Centrifugal draught fan rolling gear Download PDFInfo
- Publication number
- CN2217128Y CN2217128Y CN 94229627 CN94229627U CN2217128Y CN 2217128 Y CN2217128 Y CN 2217128Y CN 94229627 CN94229627 CN 94229627 CN 94229627 U CN94229627 U CN 94229627U CN 2217128 Y CN2217128 Y CN 2217128Y
- Authority
- CN
- China
- Prior art keywords
- tooth
- external tooth
- gear ring
- draught fan
- internal tooth
- 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.)
- Expired - Fee Related
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- General Details Of Gearings (AREA)
Abstract
The utility model relates to a rolling gear of a large centrifugal draught fan. A tooth type clutch is provided with a speed reducer 1; the output shaft 2 of the tooth type clutch is fixedly connected with an internal tooth 3 and a shaft sleeve 4; an external tooth 5 is matched with the shaft sleeve 4 in an axial and sliding mode. A gear ring of the external tooth 5 is engaged with a gear ring of the internal tooth 3. The internal tooth 6 is fixedly connected with a main shaft of a draught fan 7; the gear ring of the internal tooth 6 can be engaged with the gear ring of the external tooth 5; a groove 17 is arranged on the external tooth. An actuating mechanism is provided with a power cylinder 12; a piston rod 13 of the power cylinder 12 is connected with a sliding shaft 14. A shifting fork 11 is connected with the sliding shaft 14; one other end of the shifting fork 11 is positioned in the groove 17 of the external tooth 5; the actuating mechanism is controlled by an electromagnetic reversing valve 15 and a loop of the electromagnetic reversing valve 15.
Description
The utility model is relevant with the barring gear of large centrifugal induced draught fan.
Centrifugal type draught fan in the large-scale power generating equipment unit does not all design barring gear.When the power generating equipment unit stopped, thermal distortion easily took place owing to lose rotating speed in the induced draught fan main shaft.Main shaft after the distortion is not suitable for start-up control Design of device parameter, often can not restart for a long time.In addition, it is very inconvenient to keep in repair because can not any rotation angle degree blower fan when maintenance.
The purpose of this utility model provides a kind of simple in structure, and is easy to operate, reliable in function, the centrifugal type draught fan barring gear of safety.
The utility model is by tooth clutch, and actuator and control circuit are formed.Tooth clutch has speed reducer 1, is fixed with internal tooth 3 and axle sleeve 4 on its output shaft 2.External tooth 5 and axle sleeve axial sliding fit, the gear ring engagement of the gear ring of external tooth 5 and internal tooth 3.Internal tooth 6 is connected with induced draught fan main shaft 7, and its gear ring can mesh with the gear ring of external tooth 5, and groove 17 is arranged on the external tooth 5.
The dynamic cylinder 12 of actuator, its piston rod 13 is connected with sliding axle 14.Shift fork 11 is installed on the sliding axle 14, and its upper end is positioned at the groove 17 of external tooth 5.Actuator is by solenoid directional control valve 15 and circuit controls thereof.
On the pressing plate 8 of the present utility model spring fixing pin 16 is arranged, there is blind hole 10 external tooth 5 end face corresponding parts.Spring 9 one ends are enclosed within on the fixing pin 16, and an end is positioned at blind hole 10.There is the axis of guide 18 shift fork 11 both sides.Shift fork 11 is between two position limit switches 19, and position limit switch 19 inserts the electromagnetic switch valve controling circuit.
When the utility model needs jiggering when blower fan, at first start the motor of speed reducer 1, the rotating speed of speed reducer output shaft 2 is 1.5r/min, drives internal tooth 3 and rotates, and drive external tooth 5 rotations.Press the control knob of solenoid directional control valve 15 this moment, source of the gas (or hydraulic oil) enters the right chamber of ram (cylinder or oil cylinder) 12 immediately by pipeline, promoting piston rod 13 and sliding axle 14 is moved to the left, shift fork 11 also is moved to the left driving external tooth 5 and is moved to the left, with internal tooth 6 engagements, realize blower fan main shaft 7 jiggerings.As long as keep the solenoid directional control valve 15 and the energising of ram 12 to ventilate by (or logical oil), can carry out the jiggering of blower fan main shaft for a long time.When blower fan main shaft does not need jiggering, at first press and stop the jiggering button, solenoid directional control valve 15 outages, change the moving direction of ram 12, piston rod 13 and sliding axle 14 are moved to the left, and shift fork 11 also moves right, external tooth 5 breaks away from engagement with internal tooth 6, realizes that promptly blower fan main shaft 7 jiggerings stop.Press speed reducer 1 motor stop button at last, this moment, whole jiggering remained static.
The utility model is simple in structure, and make, install, debug easily, reliable in function, easy to operate.Can realize control and remote-controlled operation automatically.The zero-bit jiggering of blower fan main shaft can be realized, blower fan when maintenance main shaft jiggering at any angle can be realized.Can realize the long-time jiggering after blower fan is shut down, prevent the hot shaping of blower fan main shaft after shutdown.
Fig. 1 is the utility model overall construction drawing.
Fig. 2 is the A-A sectional view of Fig. 1.
Following is embodiment of the present utility model:
On cycloidal planetary gear speed reducer 1 output shaft 2 axle sleeve 24 and internal tooth 3 are housed.Sliding shaft sleeve 4 and pressing plate 8 are equipped with by hold-down bolt 23 in axle 2 ends.Duplex external tooth 5 is housed on the axle sleeve 4.The right gear ring of external tooth 5 and the engagement of the gear ring of internal tooth 3.The internal diameter of external tooth 5 and axle sleeve 4 are slidingly matched.Internal tooth 6 usefulness screws are connected on the blower fan main shaft 7.The gear ring of internal tooth 6 can mesh with the left gear ring of external tooth 5.Fixing pin 16 is arranged on the pressing plate 8, and there is blind hole 10 external tooth 6 left sides, and spring 9 one ends are enclosed within on the fixing pin 16, and an end is positioned at blind hole 10.
Sliding axle 14 is loaded in the copper sheathing 25 on the pedestal 20.Sliding axle 14 is connected with the piston rod 13 of cylinder 15.Shift fork 11 is loaded on the sliding axle 14 by key.Shift fork garden arc-shaped upper ends is positioned at the groove 17 of external tooth 5.The axis of guide 18 is equipped with in the shift fork both sides.Shift fork 11 lower ends are between two position limit switches 19.Position limit switch inserts in the control circuit of solenoid valve 15.
Claims (2)
1, the centrifugal induced draught fan barring gear, it is characterized in that by tooth clutch, actuator and control circuit are formed, tooth clutch has speed reducer (1), be fixed with internal tooth (3) and axle sleeve (4) on its output shaft (2), external tooth (5) and axle sleeve (4) axial sliding fit, the gear ring engagement of the gear ring of external tooth (5) and internal tooth (3), internal tooth (6) is connected with induced draught fan main shaft (7), its gear ring can mesh with the gear ring of external tooth (5), groove (17) is arranged on the external tooth (5), the dynamic cylinder of actuator (12), its piston rod (13) is connected with sliding axle (14), and shift fork 11 is connected with sliding axle (14), the one end is positioned at the groove (17) of external tooth (5), and actuator is by solenoid directional control valve (15) and circuit controls thereof.
2, centrifugal induced draught fan barring gear according to claim 1, it is characterized in that pressing plate (8) is connected in axle sleeve (4) end face, spring fixing pin (16) is arranged on it, there is blind hole (10) external tooth (5) end face corresponding part, spring (9) one ends are enclosed within on the fixing pin (16), and an end is positioned at blind hole (10), and there is the axis of guide (18) the shift fork both sides, shift fork (11) is positioned between the position limit switch (19), and position limit switch (19) inserts the electromagnetic switch valve controling circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229627 CN2217128Y (en) | 1994-09-26 | 1994-09-26 | Centrifugal draught fan rolling gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229627 CN2217128Y (en) | 1994-09-26 | 1994-09-26 | Centrifugal draught fan rolling gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2217128Y true CN2217128Y (en) | 1996-01-10 |
Family
ID=33841912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94229627 Expired - Fee Related CN2217128Y (en) | 1994-09-26 | 1994-09-26 | Centrifugal draught fan rolling gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2217128Y (en) |
-
1994
- 1994-09-26 CN CN 94229627 patent/CN2217128Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |