CN202531785U - Double-input high-speed gearbox for steam turbine - Google Patents
Double-input high-speed gearbox for steam turbine Download PDFInfo
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- CN202531785U CN202531785U CN2012200909542U CN201220090954U CN202531785U CN 202531785 U CN202531785 U CN 202531785U CN 2012200909542 U CN2012200909542 U CN 2012200909542U CN 201220090954 U CN201220090954 U CN 201220090954U CN 202531785 U CN202531785 U CN 202531785U
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- input shaft
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Abstract
The utility model relates to a double-input high-speed gearbox for a steam turbine, which is used for a 1.5MW solar double-cylinder condensing steam turbine. The double-input high-speed gearbox for the steam turbine comprises high and low speed input shafts; a rotating speed of a high speed input shaft I at a high-pressure end is 36000rpm; the rotating speed of a high speed input shaft II at a low-pressure end is 7500rpm; the high speed input shaft I is directly connected with a high-pressure impeller; a cantilever of a high-pressure impeller of the steam turbine is supported on the high speed input shaft I; and the high speed input shaft II is connected with a low-pressure cylinder of the steam turbine through a coupler. According to the double-input high-speed gearbox for the steam turbine, the diameter of a big gear is greatly reduced, the oil throwing power consumption of the gear is reduced and the transmission efficiency of the gearbox is increased; cooling cavities are respectively arranged for a supporting bearing at the end of the high-pressure impeller and a box body, so that the influence of high-temperature steam on the bearing alloy is effectively reduced; an axial clearance of a high-pressure rotating shaft is not influenced by a low-pressure rotating shaft, thereby being beneficial to the assembling clearance adjustment and property promotion of the high-pressure impeller; and except being applied to a solar heating generating system, the double-input high-speed gearbox is applied to the fields of industrial waste heat generation or heat and electricity co-supply, gas steam combined generation, and the like.
Description
Technical field
The utility model relates to the steam turbine field, is specifically related to the speed-change gear box device of a kind of two high rotating speed input, low speed output, and said device is used for the MW level steam turbine developed as solar light-heat power-generation thermal technology conversion equipment.
Background technique
Solar energy is as clean energy resource, has distinct advantages such as inexhaustible, pollution-free, cheapness, enormous and latent market arranged, and will progressively in energy consumption structure, occupy significant share, becomes one of the main energy sources in the whole world.
Solar heat power generation system is made up of three parts usually: solar thermal collection system, accumulation of heat and heat-exchange system, hot merit converting system.Above-mentioned three big systems work simultaneously, accomplish by the conversion of luminous energy to electric energy.Yet, because this system's steam parameter was lower in the past, and, be difficult to satisfy the system requirements of solar heat power generation system because traditional single rotating speed, small capacity, the turbine efficiency of low parameter, starting time are long.
According to country " renewable energy sources development " 12 " planning "; It is that installation in 2015 reaches 1,000,000 kilowatts that the solar energy thermal-power-generating target is drafted; Reach 3,000,000 kilowatts to the year two thousand twenty installation, only market scale of equipment just can reach 15,000,000,000 yuan, and the Equipment Market scale can reach 45,000,000,000 yuan in 10 years.Therefore market prospects are wide.
For this reason, a kind of novel steam turbine that is applicable to solar heat power generation system of market in urgent need.Be applicable to that the successful development of the novel steam turbine of solar heat power generation system will drive the development of domestic and international solar energy thermal-power-generating cause.But at present, such steam turbine also is in development at home, and this type of double input, high-revolving gearbox still are in blank at home.
The model utility content
For overcoming the problems referred to above; The utility model provides a kind of double input high gear gearbox; Particularly; The utility model provides a kind of MW level steam turbine with double input high gear gearbox, is the speed-change gear box device of two high rotating speeds inputs, low speed output, and said MW level steam turbine is to be used for being directed against solar light-heat power-generation thermal technology conversion equipment and the steam turbine developed with double input high gear gearbox.
For achieving the above object, the steam turbine of the utility model is following with the technological scheme of double input high gear gearbox:
A kind of twin-tub steam turbine is with double input high gear gearbox; Be used for the MW level steam turbine; Comprise: gear housing, high speed input shaft, low speed input shaft, output shaft and barring gear is characterized in that: said high speed input shaft has the high speed input shaft of two different rotating speeds, high voltage terminal high speed input shaft I and low voltage terminal high speed input shaft II; The rotating speed of said high voltage terminal high speed input shaft I is more than 36000rpm, and the rotating speed of said low voltage terminal high speed input shaft II is more than 7500rpm.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: said high voltage terminal high speed input shaft I and turbine high-pressure power impeller direct connection, turbine high-pressure impeller cantilever support is on high voltage terminal high speed input shaft;
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: said low voltage terminal high speed input shaft II and turbine low pressure cylinder connect through crown gear coupling.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: the axial region of said high voltage terminal high speed input shaft I is provided with thrust disc, and output shaft end is provided with thrust-bearing, the distribution of each axial force and handling as follows:
The axial force of said high voltage terminal high speed input shaft I passes to output shaft through thrust disc, passes to gear housing through the output shaft end thrust-bearing;
Said low pressure (LP) cylinder high speed input shaft II is provided with thrust-bearing separately, bears the axial force of steam turbine thrust and gear transmission.
Thus, the axial clearance that has guaranteed the high pressure rotating shaft does not receive the influence of low pressure rotating shaft, helps the adjustment of fit up gap and the performance boost and the operation steady in a long-term of high-pressure impeller.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: high voltage terminal centre distance 392mm, low voltage terminal centre distance 506mm, velocity ratio are respectively high voltage terminal 12.087 and low voltage terminal 2.5.
Thus, compact centre distance has reduced the pitch circle linear velocity of gear, has reduced the oily power consumption of getting rid of of gear, has improved the transmission efficiency of gear housing.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: the tank wall of the nearly high-pressure cylinder of said gear housing is provided with the oil cooling cavity, and the cooling cavity is arranged on the gear housing inboard, glossy lubricating oil circulation cooling bearing seat.
Thus, guaranteed the uniformity consistency of gear housing tank wall temperature; Utilize lubricant oil effectively to reduce the influence of high-temperature steam to this place's bearing metal.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: said steam turbine high-pressure cylinder side cover is an integrated type, is welded as a whole with gear housing.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: said high voltage terminal high speed input shaft I, low voltage terminal high speed input shaft II and output shaft bearing span are 240mm.
Thus, both reduced the load of bearing, improved, reduced the power consumption of each bearing shell again, improved the total efficiency of gear-box owing to instantaneous nonsynchronous short-time overload that causes.
According to the described steam turbine double input of the utility model high gear gearbox, it is characterized in that: said output shaft rotating speed is 3000rpm.
With double input high gear gearbox, except that being used for solar heat power generation system, also can be used for fields such as industrial afterheat power generation or cogeneration, gas vapor cogeneration according to the described steam turbine of the utility model,
According to a kind of steam turbine double input of the utility model high gear gearbox, advantage is following:
1) this gear-box design of gears under the situation of proof strength, has been chosen rational centre distance and velocity ratio, and compact centre distance has reduced the pitch circle linear velocity of gear, has reduced the oily power consumption of getting rid of of gear, has improved the gear-box transmission efficiency.
2) under the situation of the rotor characteristics that does not influence the high speed input shaft; Reasonably strengthened bearing span, reduced the load of bearing, thereby improved because instantaneous nonsynchronous short-time overload that causes; Reduce the power consumption of each bearing shell again, improved the total efficiency of gear-box.
3) high-pressure impeller end spring bearing and casing respectively are provided with cooling chamber, utilize lubricant oil effectively to reduce the influence of high-temperature steam to this place's bearing metal.
4) axial force of high voltage terminal input shaft passes to output shaft through thrust disc; The axial force of low pressure rotating shaft is carried by thrust-bearing separately; The axial clearance that has guaranteed the high pressure rotating shaft does not receive the influence of low pressure rotating shaft; Help the adjustment of fit up gap and the performance boost of high-pressure impeller, operation steady in a long-term.
Comprise the choosing of double input rotating ratio, synchronously, balance of axial force is handled, the casing cooling with imports bearing lubrication etc., compact structure, stable at a high speed.
Description of drawings
Fig. 1 is that the MW level steam turbine of the utility model is with double input high gear gearbox schematic representation.
Among the figure, 1 is gear housing, and 2 is the high pressure rotating shaft, and 3 is high-pressure impeller; 4 are the high voltage terminal watt sliding bearing that can incline, and 5 is the oil cooling cavity, and 6 are the output sliding bearing, and 7 is output shaft; 8 is gearwheel, and 9 are low voltage terminal input thrust-journal plain bearing, and 10 is the low pressure rotating shaft, and 11 is electric barring equipment.
Embodiment
Below, with reference to accompanying drawing, the MW level steam turbine that specifies the utility model with embodiment is with double input high gear gearbox.
Embodiment 1
A kind of MW level steam turbine comprises with double input high gear gearbox: gear housing, high speed input shaft and output shaft.Said high speed input shaft has the high speed input shaft axle of two different rotating speeds, and the rotating speed of high voltage terminal high speed input shaft I is more than 30000rpm, and the rotating speed of low voltage terminal high speed input shaft I is more than 7500rpm, and the output shaft rotating speed is 3000rpm.
In the present embodiment, said high speed input shaft I and steam turbine direct connection, turbine high-pressure impeller cantilever support is on the high speed input shaft.Said high speed input shaft II and turbine low pressure cylinder connect through coupling.The axial region of high speed input shaft I is provided with thrust disc, and output shaft end is provided with thrust-bearing.
The distribution of each axial force and handling as follows:
The axial force of said high voltage terminal high speed input shaft I passes to output shaft through thrust disc, passes to gear housing through the output shaft end thrust-bearing; Said low pressure (LP) cylinder high speed input shaft II is provided with thrust-bearing separately, bears steam turbine thrust and gear meshing power.
Thus, the axial clearance that has guaranteed the high pressure rotating shaft does not receive the influence of low pressure rotating shaft, helps the adjustment of fit up gap and the performance boost and the operation steady in a long-term of high-pressure impeller.
In the present embodiment, high voltage terminal centre distance 392mm, low voltage terminal centre distance 506mm, velocity ratio are respectively high voltage terminal 12.087 and low voltage terminal 2.5.Thus, compact centre distance has reduced the pitch circle linear velocity of gear, has reduced the oily power consumption of getting rid of of gear, has improved the transmission efficiency of gear housing.
In addition, the tank wall of the nearly high-pressure cylinder of said gear housing is provided with the oil cooling cavity.Thus, guaranteed the uniformity consistency of gear housing tank wall temperature; Utilize lubricant oil effectively to reduce the influence of high-temperature steam to this place's bearing metal.
In addition, said steam turbine high-pressure cylinder side cover is an integrated type, is welded as a whole with gear housing.Said high voltage terminal high speed input shaft I, low voltage terminal high speed input shaft II and output shaft bearing span are 240mm.
Practical implementation is following:
400 ℃～500 ℃ high pressure steam drives high-pressure impeller 3 and drives high pressure rotating shaft 2 high speed rotating, and high pressure rotating shaft 2 drives output shaft 7 and low pressure rotating shaft 10 rotations.High pressure steam is through after the high-pressure impeller acting, through steam again hot-fluid to steam turbine, to drive low pressure rotating shaft 10.Rotating speed and the high pressure rotating shaft of regulating the low pressure rotating shaft through the regulating the qi flowing in the channels door are synchronous, and at this moment, high pressure rotating shaft 2 drives output shaft 7 rotations simultaneously with low pressure rotating shaft 10, and reaches the generator working speed, drives generator for electricity generation.
High pressure rotating shaft 2 is by high voltage terminal 4 supports of watt sliding bearing of can inclining; Axial force passes to output shaft 7 by the thrust disc in the high pressure rotating shaft; Low pressure rotating shaft 10 is supported by low voltage terminal input thrust-journal plain bearing 9, and axial force is carried by sliding bearing 9, does not pass to output shaft 7; Output shaft 7 is supported by output sliding bearing 6, and carries the axial force that high voltage terminal passes over.
According to the steam turbine double input high gear gearbox of the utility model, advantage is following:
1) this gear-box design of gears under the situation of proof strength, has been chosen rational centre distance and velocity ratio, and compact centre distance has reduced the pitch circle linear velocity of gear, has reduced the oily power consumption of getting rid of of gear, has improved the gear-box transmission efficiency.
2) under the situation of the rotor characteristics that does not influence the high speed input shaft; Reasonably strengthened bearing span, reduced the load of bearing, thereby improved because instantaneous nonsynchronous short-time overload that causes; Reduce the power consumption of each bearing shell again, improved the total efficiency of gear-box.
3) high-pressure impeller end spring bearing and casing respectively are provided with cooling chamber, utilize lubricant oil effectively to reduce the influence of high-temperature steam to this place's bearing metal.
4) axial force of high voltage terminal input shaft passes to output shaft through thrust disc; The axial force of low pressure rotating shaft is carried by thrust-bearing separately; The axial clearance that has guaranteed the high pressure rotating shaft does not receive the influence of low pressure rotating shaft; Help the adjustment of fit up gap and the performance boost of high-pressure impeller, operation steady in a long-term.
Claims (9)
1. a twin-tub steam turbine is with double input high gear gearbox; Be used for the MW level steam turbine; Comprise: gear housing, high speed input shaft, low speed input shaft, output shaft and barring gear is characterized in that: said high speed input shaft has the high speed input shaft of two different rotating speeds, high voltage terminal high speed input shaft I and low voltage terminal high speed input shaft II; The rotating speed of said high voltage terminal high speed input shaft I is more than 36000rpm, and the rotating speed of said low voltage terminal high speed input shaft II is more than 7500rpm.
2. steam turbine as claimed in claim 1 is characterized in that with double input high gear gearbox: said high voltage terminal high speed input shaft I and turbine high-pressure power impeller direct connection, turbine high-pressure impeller cantilever support is on high voltage terminal high speed input shaft.
3. steam turbine double input high gear gearbox as claimed in claim 1 is characterized in that: said low voltage terminal high speed input shaft II and turbine low pressure cylinder connect through crown gear coupling.
4. steam turbine double input high gear gearbox as claimed in claim 1 is characterized in that: the axial region of said high voltage terminal high speed input shaft I is provided with thrust disc, and output shaft end is provided with thrust-bearing, the distribution of each axial force and handling as follows:
The axial force of said high voltage terminal high speed input shaft I passes to output shaft through thrust disc, passes to gear housing through the output shaft end thrust-bearing;
Said low pressure (LP) cylinder high speed input shaft II is provided with thrust-bearing separately, bears the axial force of steam turbine thrust and gear transmission.
5. steam turbine double input high gear gearbox as claimed in claim 1 is characterized in that: high voltage terminal centre distance 392mm, low voltage terminal centre distance 506mm, velocity ratio are respectively high voltage terminal 12.087 and low voltage terminal 2.5.
6. steam turbine double input high gear gearbox as claimed in claim 1, it is characterized in that: the tank wall of the nearly high-pressure cylinder of said gear housing is provided with the oil cooling cavity, and the cooling cavity is arranged on the gear housing inboard, glossy lubricating oil circulation cooling bearing seat.
7. steam turbine double input high gear gearbox as claimed in claim 1, it is characterized in that: said steam turbine high-pressure cylinder side cover is an integrated type, is welded as a whole with gear housing.
8. steam turbine as claimed in claim 1 is characterized in that with double input high gear gearbox: said high voltage terminal high speed input shaft I, low voltage terminal high speed input shaft II and output shaft bearing span are 240mm.
9. steam turbine as claimed in claim 1 is characterized in that with double input high gear gearbox: said output shaft rotating speed is 3000rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200909542U CN202531785U (en) | 2012-03-12 | 2012-03-12 | Double-input high-speed gearbox for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200909542U CN202531785U (en) | 2012-03-12 | 2012-03-12 | Double-input high-speed gearbox for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202531785U true CN202531785U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200909542U Withdrawn - After Issue CN202531785U (en) | 2012-03-12 | 2012-03-12 | Double-input high-speed gearbox for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202531785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619961A (en) * | 2012-03-12 | 2012-08-01 | 江苏金通灵流体机械科技股份有限公司 | Double-input high-speed gear transmission box used for steam turbine |
-
2012
- 2012-03-12 CN CN2012200909542U patent/CN202531785U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619961A (en) * | 2012-03-12 | 2012-08-01 | 江苏金通灵流体机械科技股份有限公司 | Double-input high-speed gear transmission box used for steam turbine |
| CN102619961B (en) * | 2012-03-12 | 2013-06-05 | 江苏金通灵流体机械科技股份有限公司 | Double-input high-speed gear transmission box used for steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121114 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |