CN204186434U - Steam turbine steam feed pump front-mounted pump bearing arrangement - Google Patents
Steam turbine steam feed pump front-mounted pump bearing arrangement Download PDFInfo
- Publication number
- CN204186434U CN204186434U CN201420592828.6U CN201420592828U CN204186434U CN 204186434 U CN204186434 U CN 204186434U CN 201420592828 U CN201420592828 U CN 201420592828U CN 204186434 U CN204186434 U CN 204186434U
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- bearing
- pump
- mounted pump
- bearing arrangement
- free end
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of steam turbine steam feed pump front-mounted pump bearing arrangement, relate to power generation technical field, comprise a front-mounted pump body, this front-mounted pump body has drive end and free end, it is characterized in that: be provided with one at described free end and only bear the single-row roller bearing that radial force does not bear axial force, at described drive end, the angular contact ball bearing that two are born axial force is installed.The utility model, under the prerequisite not changing any parts of front-mounted pump and water pump structure, is only optimized in front-mounted pump bearings at both ends type selecting; Meanwhile, because of the change of bearing designation, produce water pump spindle to change in location, and suitably adjust, just can realize bearing arrangement optimization, after being optimized by bearing, front-mounted pump temperature is just controlled effectively, and has practicability comparatively strong, the advantage of Be very effective.
Description
Technical field
The utility model relates to power generation technical field, is specifically related to a kind of steam turbine steam feed pump front-mounted pump bearing arrangement.
Background technique
At present, most domestic 600MW steam turbine steam feed pump front-mounted pump model HZB253-640, by Shanghai Electric Power, building and repair plant produces.This pump be horizontal, single-stage, double suction vertically pass in and out, single volute pump.Driven by motor, carry out power transimission by the stacked coupling of flexibility.Driving end is single-row roller bearing, and free end is angular contact ball bearing, provides lubrication by oil ring.This pump operation existing problems are that free end bearing temperature is high, have generality.
Fig. 1 is the structure before front-mounted pump improves, and its free end arranges 2 angular contact ball bearings 2, and driving end is single-row roller bearing 1, is furnished with oil thrower in outside, and water quench is arranged at bottom, grease chamber.Front-mounted pump operating conditions is so the lubricants capacity entering inboard bearing is less, and the medium temperature in front-mounted pump reaches 180 DEG C, front-mounted pump expanded by heating in operation, its middle pump body acts on by lateral pin, vertical pin, along outlet flow split left and right even inflation, affect clutch work.Two angular contact ball bearing sides installed by pump shaft is dead point, expands to being equipped with single-row roller bearing side.Motor cooling air can only be cooled to single-row roller bearing, cannot be cooled to 2 angular contact ball bearings bearing end thrust.
The high solution adopted in power plant of the same type at present of front-mounted pump temperature has:
1) increase a lubricant oil petrol station, by oil pump, lubricant oil is transported to front-mounted pump bearing, carry out pressure cooling; Investment is large, system complex.Can ensure that bearing temperature meets the demands.
2) in front-mounted pump bearings at both ends, add a small coils cooler, force cooling by cooling water, reduce bearing temperature; Because two end axles bearing space is little, the cooler area of increase is restricted, and cooling effect is poor.Front-mounted pump bearing temperature is high, cannot reduce at all.
3) change front-mounted pump two end axles bearing, add external cooler on bearing support top, effect is also not satisfactory.
Model utility content
It is simple that technical problem to be solved in the utility model is to provide a kind of structure, the steam turbine steam feed pump front-mounted pump bearing arrangement that practicability is stronger.
Technical problem to be solved in the utility model realizes by the following technical solutions:
A kind of steam turbine steam feed pump front-mounted pump bearing arrangement, comprise a front-mounted pump body, this front-mounted pump body has drive end and free end, it is characterized in that: be provided with one at described free end and only bear the single-row roller bearing that radial force does not bear axial force, at described drive end, the angular contact ball bearing that two are born axial force is installed, because this pump structure is symmetrical, front-mounted pump pump shaft, two end axles bearing and other parts do not need to change, and just can implement the optimization of front-mounted pump bearing arrangement;
Two-row ball bearing is arranged in driving end, mainly has 2 considerations:
1, driving end external refrigeration condition is better than free end, and the cooling air from motor air cooling device can carry out pressure cooling to bearing support outside.
2, the medium temperature in front-mounted pump reaches 180 DEG C, front-mounted pump expanded by heating in operation, and its middle pump body acts on, along outlet flow split left and right even inflation by lateral pin, vertical pin.Two angular contact ball bearing sides installed by pump shaft is dead point, expands to being equipped with single-row roller bearing side.
The beneficial effects of the utility model are: the utility model, under the prerequisite not changing any parts of front-mounted pump and water pump structure, is only optimized in front-mounted pump bearings at both ends type selecting; Meanwhile, because of the change of bearing designation, produce water pump spindle to change in location, and suitably adjust, just can realize bearing arrangement optimization, after being optimized by bearing, front-mounted pump temperature is just controlled effectively, and has practicability comparatively strong, the advantage of Be very effective.
Accompanying drawing explanation
Fig. 1 is front-mounted pump transformation pre-structure figure;
Fig. 2 is structural drawing after the transformation of the utility model front-mounted pump.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
As shown in Figure 2, a kind of steam turbine steam feed pump front-mounted pump bearing arrangement, comprise a front-mounted pump body 3, this front-mounted pump body 3 has drive end and free end, be provided with one at free end and only bear the single-row roller bearing 1 that radial force does not bear axial force, at drive end, the angular contact ball bearing 2 that two are born axial force is installed, because this pump structure is symmetrical, front-mounted pump pump shaft, two end axles bearing and other parts do not need to change, and just can implement the optimization of front-mounted pump bearing arrangement;
Two-row ball bearing is arranged in driving end, mainly has 2 considerations:
1, driving end external refrigeration condition is better than free end, and the cooling air from motor air cooling device can carry out pressure cooling to bearing support outside.
2, the medium temperature in front-mounted pump reaches 180 DEG C, front-mounted pump expanded by heating in operation, and its middle pump body acts on, along outlet flow split left and right even inflation by lateral pin, vertical pin.Two angular contact ball bearing sides installed by pump shaft is dead point, expands to being equipped with single-row roller bearing side.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. a steam turbine steam feed pump front-mounted pump bearing arrangement, comprise a front-mounted pump body, this front-mounted pump body has drive end and free end, it is characterized in that: be provided with one at described free end and only bear the single-row roller bearing that radial force does not bear axial force, at described drive end, the angular contact ball bearing that two are born axial force is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592828.6U CN204186434U (en) | 2014-10-14 | 2014-10-14 | Steam turbine steam feed pump front-mounted pump bearing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592828.6U CN204186434U (en) | 2014-10-14 | 2014-10-14 | Steam turbine steam feed pump front-mounted pump bearing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204186434U true CN204186434U (en) | 2015-03-04 |
Family
ID=52618444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420592828.6U Expired - Fee Related CN204186434U (en) | 2014-10-14 | 2014-10-14 | Steam turbine steam feed pump front-mounted pump bearing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204186434U (en) |
-
2014
- 2014-10-14 CN CN201420592828.6U patent/CN204186434U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 Termination date: 20151014 |
|
| EXPY | Termination of patent right or utility model |