CN202391498U - Throw-in type turning gear of chain wheel worm and worm wheel escapement - Google Patents
Throw-in type turning gear of chain wheel worm and worm wheel escapement Download PDFInfo
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- CN202391498U CN202391498U CN2012200255223U CN201220025522U CN202391498U CN 202391498 U CN202391498 U CN 202391498U CN 2012200255223 U CN2012200255223 U CN 2012200255223U CN 201220025522 U CN201220025522 U CN 201220025522U CN 202391498 U CN202391498 U CN 202391498U
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Abstract
The utility model discloses a throw-in type turning gear of a chain wheel worm and worm wheel escapement, and relates to a turning gear of a steam turbine, which solves the problems that a bearing is very inconvenient to install and repair and the steam turbine can not continue to perform turning after the turning gear is lifted away from the upper cover of a bearing box, and the utilization ratio of the turning gear is low because the existing turning gear of the steam turbine is installed in the upper cover of the bearing box, the upper cover of the bearing box needs to be opened and the turning gear is lifted away when the bearing is installed or repaired. The throw-in type turning gear of the chain wheel worm and worm wheel escapement comprises an electric motor, a main shell, a chain, a drive chain wheel, a driven chain wheel, a worm wheel, a worm, a worm-wheel shaft, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a first gear shaft, a second gear shaft, a third gear shaft, a first connecting rod and two swinging plates, wherein the main shell is provided with the electric motor; the first gear is meshed with the second gear; the second gear is installed on the first gear shaft; the third gear shaft is rotationally connected with the two swinging plates; and the fifth gear is meshed with a rotor of the steam turbine. The throw-in type turning gear disclosed by the utility model is used for turning gear of the steam turbine.
Description
Technical field
The utility model relates to a kind of steam turbine and uses barring gear.
Background technique
When steam turbine starts,, often need at the impulsion rotor with the forward direction shaft seal steam in order to improve vacuum rapidly.Major part was trapped in cylinder upper after these steam got into cylinders, and it is inhomogeneous to cause cylinder and rotor to be heated up and down, if stationary rotor is motionless, just can be bent upwards distortion because of self upper and lower temperature difference produces.Crooked back rotor c.g. and rotating center do not coincide, and certainly will produce very big centrifugal force after the unit red switch, cause vibration, even cause the friction of sound part.Therefore, before the steam turbine red switch, will drive rotor with barring gear and do to slowly run, rotor is heated evenly, helps unit and starts smoothly.
After the halt turbines, parts such as cylinder and rotor are by hot cooling gradually, and its underpart cooling is fast; The top cooling is slow, and rotor produces bending because of upper and lower temperature difference, and degree of crook increased along with the time after shutting down; For large-size steam turbine, this thermal bending can reach very big numerical value, and need just can fade away through tens hours; Before thermal bending is reduced to regulation numerical value, be not allow to restart steam turbine.Therefore, after the shutdown, should drop into barring gear, jiggering can stir the steam flow that closes in the cylinder, is beneficial to eliminate the upper and lower temperature difference of cylinder, prevents rotor deformation, helps to eliminate the damage of the higher axle journal of temperature to bearing shell.
Existing rolling gear of turbine is installed in the bearing housing loam cake; When installing or overhaul bearing, need open the bearing housing loam cake, hang away barring gear, install and maintenance bearing complex operation; Extremely inconvenient; Simultaneously, existing barring gear hangs away the back steam turbine at the bearing housing loam cake can't continue jiggering, and the barring gear utilization rate is low.
The model utility content
The purpose of the utility model is to be installed in the bearing housing loam cake for solving existing rolling gear of turbine; Need open the bearing housing loam cake when installation or maintenance bearing; And hang away barring gear; Cause installing and the maintenance bearing extremely inconvenience and barring gear hang away the back steam turbine at the bearing housing loam cake and can't continue jiggering, the problem that the barring gear utilization rate is low, and then a kind of sprocket wheel worm and worm gear escapement throw-in type barring gear is provided.
The utility model is to address the above problem the technological scheme of taking to be: the sprocket wheel worm and worm gear escapement throw-in type barring gear of the utility model comprises motor, main casing, chain, drive sprocket, driven sprocket, worm gear, worm screw, worm-wheel shaft, first gear, second gear, the 3rd gear, the 4th gear, the 5th gear, first gear shaft, second gear shaft, the 3rd gear shaft, head rod and two wobble plates, and main casing is provided with motor, and the output shaft of motor is that twin shaft is stretched structure; The output shaft of motor is horizontally disposed with, and one of them shaft extension on the motor is equipped with drive sprocket, and drive sprocket is rotationally connected through chain and driven sprocket; Worm screw is horizontally disposed with, and driven sprocket is packed in the end of worm screw, worm gear and worm meshing; Worm gear is contained on the worm-wheel shaft; One end of worm-wheel shaft is fixed with first gear, first gear and second gear engagement, and second gear is contained on first gear shaft; First gear shaft is connected with main casing; Second gear and the 3rd gear engagement, the 3rd gear are contained in the end on second gear shaft, and head rod is connected with two wobble plates respectively; Second gear shaft passes two wobble plates and is rotationally connected with main casing and two wobble plates respectively; Be contained on second gear shaft at the 4th gear between two wobble plates, the 3rd gear shaft and two wobble plates are rotationally connected, and the 5th gear is contained on the 3rd gear shaft; The 4th gear and the 5th gear engagement, the 5th gear and turbine rotor engagement.
The beneficial effect of the utility model is: slowing down the first time of the utility model is to be accomplished by drive sprocket and driven sprocket; The 980r/min of motor is reduced to about 700r/min, slows down for the second time and accomplish, the about 700r/min of rotating speed is reduced to the about 43.7r/min of rotating speed by worm and worm wheel; Slow down for the third time and accomplish by first gear and second gear; It is about 25.8r/min that the about 43.7r/min of rotating speed is reduced to rotating speed, slow down for the third time to accomplish by second gear and the 3rd gear, and be about 18.6r/min with rotating speed for about 25.8r/min reduces to rotating speed; Slow down for the 4th time and accomplish by the 4th gear and the 5th gear; With rotating speed is the jiggering rotating speed that about 18.6r/min is reduced to 16.6r/min, utilizes the device of the utility model can make the moving rotor of steam turbine startup hour indicator do to slowly run, and rotor is heated evenly; Can avoid rotor to produce bending deflection, help unit and start smoothly because of the temperature difference; Utilize the device of the utility model can make the moving rotor of halt turbines hub disk do to slowly run, help stirring the steam flow that closes in the cylinder, eliminate the upper and lower temperature difference of cylinder, prevented rotor deformation effectively, also help to eliminate of the damage of the higher axle journal of temperature bearing shell; The device of the utility model is installed in the bearing housing side of low pressure (LP) cylinder generator end, and main driving mechanism is installed in below the steam turbine center line, and this design only need be opened the bearing housing loam cake when installing or overhaul bearing; Need not to hang away barring gear; Installation and maintenance bearing are easy and simple to handle, simultaneously, and when opening bearing housing loam cake reprocessing problem; Still can move rotor by the continuation dish, the barring gear utilization rate is high; The device of the utility model can start under hot state fast, can throw off the engagement of rotor and apparatus of the present invention after the steam turbine set red switch automatically; The barring gear of the utility model is the enable manual input both, can drop into automatically again, both the enable manual jiggering; Again can auto-barring, manually handwheel is contained on another shaft extension of motor during jiggering, can manual jiggering; During auto-barring, actuating motor is through the crawl control knob; Realize auto-barring, adaptability is good.
Description of drawings
Fig. 1 is the overall structure plan view of the utility model, and Fig. 2 is the train transmission unfolded drawing of the utility model, and Fig. 3 is the gear and the turbine rotor transmission sketch of the utility model.
Embodiment
Embodiment one: combine Fig. 1～Fig. 3 that this mode of execution is described, the sprocket wheel worm and worm gear escapement throw-in type barring gear of this mode of execution comprises motor 1, main casing 6, chain 3, drive sprocket 2, driven sprocket 14, worm gear 16, worm screw 15, worm-wheel shaft 17, first gear 22, second gear 24, the 3rd gear 25, the 4th gear 13, the 5th gear 27, first gear shaft 23, second gear shaft 12, the 3rd gear shaft 26, head rod 11 and two wobble plates 10, and main casing 6 is provided with motor 1; The output shaft of motor 1 is that twin shaft is stretched structure, and the output shaft of motor 1 is horizontally disposed with, and one of them shaft extension on the motor 1 is equipped with drive sprocket 2; Drive sprocket 2 is rotationally connected through chain 3 and driven sprocket 14; Worm screw 15 is horizontally disposed with, and driven sprocket 14 is packed in the end on the worm screw 15, worm gear 16 and worm screw 15 engagements; Worm gear 16 is contained on the worm-wheel shaft 17; One end of worm-wheel shaft 17 is fixed with first gear, 22, the first gears 22 and 24 engagements of second gear, and second gear 24 is contained on first gear shaft 23; First gear shaft 23 is connected with main casing 6; Second gear 24 and 25 engagements of the 3rd gear, the 3rd gear 25 is contained in the end on second gear shaft 12, and head rod 11 is connected with two wobble plates 10 respectively; Second gear shaft 12 passes two wobble plates 10 and is rotationally connected with main casing 6 and two wobble plates 10 respectively; Be contained on second gear shaft 12 at the 4th gear 13 between two wobble plates 10, the 3rd gear shaft 26 and two wobble plates 10 are rotationally connected, and the 5th gear 27 is contained on the 3rd gear shaft 26; The 4th gear 13 and 27 engagements of the 5th gear, the 5th gear 27 and turbine rotor engagement.
Embodiment two: combine Fig. 1 that this mode of execution is described; The barring gear of this mode of execution also comprises regulating mechanism; Described regulating mechanism comprises handle 19, first operating handle 21, second operating handle 18, connecting rod 4, second connecting rod 7 and chain link 20; One end and the chain link 20 of handle 19 are rotationally connected, and an end of the chain link 20 and first operating handle 21 is rotationally connected, and an end of an end of first operating handle 21 and second operating handle 18 is rotationally connected; One end of second operating handle 18 and an end of connecting rod 4 are rotationally connected, and the other end of connecting rod 4 is connected with second connecting rod 7.So be provided with, regulating mechanism can effectively be adjusted the engaging position of the 5th gear and turbine rotor, is convenient to manual jiggering or auto-barring, meets design requirement and actual demand.Other is identical with embodiment one.
Embodiment three: combine Fig. 1 that this mode of execution is described, the described chain 3 of this mode of execution is a round pin formula silent chain.So be provided with, meet design requirement and actual demand.Other is identical with embodiment one or two.
Embodiment four: combine Fig. 1 and Fig. 2 that this mode of execution is described, described first gear 22 of this mode of execution, second gear 24, the 3rd gear 25, the 4th gear 13 and the 5th gear 27 are involute cylindrical gear.So be provided with, meet design requirement and actual demand.Other is identical with embodiment one or two.
Embodiment five: combine Fig. 1 that this mode of execution is described; The barring gear of this mode of execution also comprises block 5; Block 5 is arranged on the main casing 6 of two wobble plate 10 tops, and block 5 is used to limit the depth of engagement of the 5th gear 27 that is connected on two wobble plates 10 and turbine rotor.So be provided with, satisfy the real work needs.Other is identical with embodiment one or two.
Claims (5)
1. sprocket wheel worm and worm gear escapement throw-in type barring gear; It is characterized in that: it comprises motor (1), main casing (6), chain (3), drive sprocket (2), driven sprocket (14), worm gear (16), worm screw (15), worm-wheel shaft (17), first gear (22), second gear (24), the 3rd gear (25), the 4th gear (13), the 5th gear (27), first gear shaft (23), second gear shaft (12), the 3rd gear shaft (26), head rod (11) and two wobble plates (10), and main casing (6) is provided with motor (1), and the output shaft of motor (1) is that twin shaft is stretched structure; The output shaft of motor (1) is horizontally disposed with; One of them shaft extension on the motor (1) is equipped with drive sprocket (2), and drive sprocket (2) is rotationally connected through chain (3) and driven sprocket (14), and worm screw (15) is horizontally disposed with; Driven sprocket (14) is packed in the end of worm screw (15); Worm gear (16) and worm screw (15) engagement, worm gear (16) is contained on the worm-wheel shaft (17), and an end of worm-wheel shaft (17) is fixed with first gear (22); First gear (22) and second gear (24) engagement; Second gear (24) is contained on first gear shaft (23), and first gear shaft (23) is connected with main casing (6), second gear (24) and the 3rd gear (25) engagement; The 3rd gear (25) is contained in the end on second gear shaft (12); Head rod (11) is connected with two wobble plates (10) respectively, and second gear shaft (12) passes two wobble plates (10) and is rotationally connected with main casing (6) and two wobble plates (10) respectively, and the 4th gear (13) that is positioned between two wobble plates (10) is contained on second gear shaft (12); The 3rd gear shaft (26) is rotationally connected with two wobble plates (10); The 5th gear (27) is contained on the 3rd gear shaft (26), the 4th gear (13) and the 5th gear (27) engagement, the 5th gear (27) and turbine rotor engagement.
2. sprocket wheel worm and worm gear escapement throw-in type barring gear according to claim 1; It is characterized in that: this barring gear also comprises regulating mechanism; Described regulating mechanism comprises handle (19), first operating handle (21), second operating handle (18), connecting rod (4), second connecting rod (7) and chain link (20); One end of handle (19) and chain link (20) are rotationally connected, and chain link (20) is rotationally connected with an end of first operating handle (21), and an end of an end of first operating handle (21) and second operating handle (18) is rotationally connected; One end of one end of second operating handle (18) and connecting rod (4) is rotationally connected, and the other end of connecting rod (4) is connected with second connecting rod (7).
3. sprocket wheel worm and worm gear escapement throw-in type barring gear according to claim 1 and 2, it is characterized in that: described chain (3) is a round pin formula silent chain.
4. sprocket wheel worm and worm gear escapement throw-in type barring gear according to claim 1 and 2, it is characterized in that: described first gear (22), second gear (24), the 3rd gear (25), the 4th gear (13) and the 5th gear (27) are involute cylindrical gear.
5. sprocket wheel worm and worm gear escapement throw-in type barring gear according to claim 1 and 2; It is characterized in that: this device also comprises block (5); Block (5) is arranged on the main casing (6) of two wobble plates (10) tops, and block (5) is used for limiting the depth of engagement of the 5th gear (27) that is connected on two wobble plates (10) and turbine rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200255223U CN202391498U (en) | 2012-01-19 | 2012-01-19 | Throw-in type turning gear of chain wheel worm and worm wheel escapement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200255223U CN202391498U (en) | 2012-01-19 | 2012-01-19 | Throw-in type turning gear of chain wheel worm and worm wheel escapement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202391498U true CN202391498U (en) | 2012-08-22 |
Family
ID=46666428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200255223U Expired - Lifetime CN202391498U (en) | 2012-01-19 | 2012-01-19 | Throw-in type turning gear of chain wheel worm and worm wheel escapement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202391498U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562188A (en) * | 2012-01-19 | 2012-07-11 | 哈尔滨汽轮机厂有限责任公司 | Throw-in type turning gear with chain wheels, worm, worm wheel and balance wheel |
| CN103835776A (en) * | 2014-03-14 | 2014-06-04 | 上海电气电站设备有限公司 | Device for machining and assembling steam turbine rotor |
-
2012
- 2012-01-19 CN CN2012200255223U patent/CN202391498U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562188A (en) * | 2012-01-19 | 2012-07-11 | 哈尔滨汽轮机厂有限责任公司 | Throw-in type turning gear with chain wheels, worm, worm wheel and balance wheel |
| CN103835776A (en) * | 2014-03-14 | 2014-06-04 | 上海电气电站设备有限公司 | Device for machining and assembling steam turbine rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |
|
| CX01 | Expiry of patent term |