CN204200693U - Induced draught fan bearing housing cooling air system - Google Patents
Induced draught fan bearing housing cooling air system Download PDFInfo
- Publication number
- CN204200693U CN204200693U CN201420569544.5U CN201420569544U CN204200693U CN 204200693 U CN204200693 U CN 204200693U CN 201420569544 U CN201420569544 U CN 201420569544U CN 204200693 U CN204200693 U CN 204200693U
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- CN
- China
- Prior art keywords
- bearing housing
- cooling
- draught fan
- cool wind
- induced draught
- 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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Abstract
A kind of induced draught fan bearing housing cooling air system, comprise the bearing housing cool wind hood be located on bearing housing, the taper cool wind hood of connection bearing case cool wind hood, connect the tapering transition cooling duct of taper cool wind hood, connect the cooling duct of tapering transition cooling duct, connect the three-way pipe of cooling duct, and the cooling blower of connecting tee pipe, taper cool wind hood is provided with some return air holes.The utility model reduces the resistance of cooling air system, adds cooling air circulation area, increases cooling air quantity, the stability contorting temperature of induced draught fan bearing.
Description
Technical field
The utility model relates to a kind of induced draught fan bearing housing cooling air system.
Background technique
Boiler draft machine bearing can produce very high-temperature in the course of the work, induced draught fan bearing housing cooling air system is needed to carry out temperature control to induced draught fan bearing, the international Lv Si port Power Generation Corporation Ltd. of Jiangsu Datang 4 660MW ultra supercritical unit are new-built unit, and four units are respectively in March, 2010 to June power generation in succession.Four boilers, 8 supercharging induced draught fans start since Installation and Debugging; because the cooling air quantity of induced draught fan bearing housing cooling air system is not enough; cooling effect is poor; occur repeatedly that (bearing temperature is up to more than 99 DEG C because induced draught fan bearing temperature is high; and temperature is uncontrollable) be forced to load down shutdown accident settlement, be therefore badly in need of thoroughly solving the high problem of induced draught fan bearing temperature.
Model utility content
The utility model provides a kind of induced draught fan bearing housing cooling air system, reduce the resistance of cooling air system, add cooling air circulation area, increase cooling air quantity, the stability contorting temperature of induced draught fan bearing.
In order to achieve the above object, the utility model provides a kind of induced draught fan bearing housing cooling air system, comprises:
Bearing housing cool wind hood, it is located on bearing housing;
Taper cool wind hood, it is cone type structure, has wide end and narrow end, and wide end is fixedly attached to described bearing housing cool wind hood by rear guide vane casing flange;
Tapering transition cooling duct, it is cone type structure, has wide end and narrow end, and wide end is fixedly connected with the narrow end of described taper cool wind hood;
Cooling duct, it is fixedly connected with the narrow end of described tapering transition cooling duct;
Three-way pipe, it is pants shapes, is fixedly connected with cooling duct;
Cooling blower, its connecting tee pipe.
The outer rim of described bearing housing cool wind hood is provided with the first circular joint, the outer rim of described taper cool wind hood is provided with the second circular joint, and described first circular joint and the second circular joint are fixed on the both sides of described rear guide vane casing flange respectively by fastening piece.
The corresponding position of the described second circular joint and rear guide vane casing flange is provided with some return air holes.
Arrange 19 return air holes, the aperture of each return air hole is Ф 38mm, and return air hole flow area is 21537 mm
2.
The wide end diameter of described tapering transition cooling duct is Φ 300, and narrow end diameter is Φ 150.
Described cooling blower selects 9-19 № 5A type cooling blower, and necessary electromotor power is 7.5kW.
The utility model reduces the resistance of cooling air system, adds cooling air circulation area, increases cooling air quantity, the stability contorting temperature of induced draught fan bearing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the enlarged diagram in A portion in Fig. 1.
Fig. 3 is the schematic cross-section of taper cool wind hood of the present utility model.
Embodiment
Following according to Fig. 1 ~ Fig. 3, illustrate preferred embodiment of the present utility model.
As depicted in figs. 1 and 2, the utility model provides a kind of induced draught fan bearing housing cooling air system, comprises:
Bearing housing cool wind hood 1, it is located on bearing housing 9;
Taper cool wind hood 4, it is cone type structure, has wide end and narrow end, and wide end is fixedly attached to described bearing housing cool wind hood 1 by rear guide vane casing flange 2;
Tapering transition cooling duct 5, it is cone type structure, has wide end and narrow end, and wide end is fixedly connected with the narrow end of described taper cool wind hood 4;
Cooling duct 6, it is fixedly connected with the narrow end of described tapering transition cooling duct 5;
Three-way pipe 7, it is pants shapes, is fixedly connected with cooling duct 6;
Cooling blower 8, its connecting tee pipe 7.
As shown in Figure 2, the outer rim of described bearing housing cool wind hood 1 is provided with the first circular joint 101, the outer rim of described taper cool wind hood 4 is provided with the second circular joint 401, and described first circular joint 101 and the second circular joint 401 are fixed on the both sides of described rear guide vane casing flange 2 respectively by fastening piece.
As shown in Figure 3, the second described circular joint 401 and the corresponding position of rear guide vane casing flange 2 are provided with some return air holes 3.
Cold wind is provided by cooling blower 8, the cold wind channel entering bearing housing 9 through three-way pipe 7, cooling duct 6, tapering transition cooling duct 5, taper cool wind hood 4 successively cools operation bearing, and the cooling air after heat exchange is then discharged by the return air hole 3 of bearing housing cool wind hood 1 successively on rear guide vane casing flange 2 and the second circular joint 401.
In the present embodiment, arrange 19 return air holes 3, the aperture of each return air hole 3 is Ф 38mm, and return air hole flow area is 21537 mm
2, return air hole diameter expands Ф 38mm to by original Ф 33mm, and return air hole hole count increases totally 19 holes extremely, 7 holes again by 12 original holes, and return air hole flow area is namely therefore by 10258mm
2be increased to 21537 mm
2.
In the present embodiment, set up tapering transition cooling duct 5, reduced the resistance of cooling air system, its wide end diameter is Φ 300, and narrow end diameter is Φ 150.
In the present embodiment, cooling blower 8 selects 9-19 № 5A type (necessary electromotor power is 7.5kW) cooling blower, increases cooling air quantity.
The utility model is applied to the international Lv Si port Power Generation Corporation Ltd. of Jiangsu Datang 4 660MW ultra supercritical unit; have passed through the large load test of summer high temperature; in 660MW load, ambient temperature 30 DEG C of situations; bearing housing temperature is by more than original 99 DEG C and temperature is uncontrollable; now be down to less than 75 DEG C and bearing temperature is highly stable; after transformation up to the present; induced draught fan not occurring again because of bearing temperature height load down shuts down disposing condition, for Lv Si port genco four unit safeties, stable, economical operation are had laid a good foundation.
Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (6)
1. an induced draught fan bearing housing cooling air system, is characterized in that, comprises:
Bearing housing cool wind hood (1), it is located on bearing housing (9);
Taper cool wind hood (4), it is cone type structure, has wide end and narrow end, and wide end is fixedly attached to described bearing housing cool wind hood (1) by rear guide vane casing flange (2);
Tapering transition cooling duct (5), it is cone type structure, has wide end and narrow end, and wide end is fixedly connected with the narrow end of described taper cool wind hood (4);
Cooling duct (6), it is fixedly connected with the narrow end of described tapering transition cooling duct (5);
Three-way pipe (7), it is pants shapes, is fixedly connected with cooling duct (6);
Cooling blower (8), its connecting tee pipe (7).
2. induced draught fan bearing housing cooling air system as claimed in claim 1, it is characterized in that, the outer rim of described bearing housing cool wind hood (1) is provided with the first circular joint (101), the outer rim of described taper cool wind hood (4) is provided with the second circular joint (401), and described first circular joint (101) and the second circular joint (401) are fixed on the both sides of described rear guide vane casing flange (2) respectively by fastening piece.
3. induced draught fan bearing housing cooling air system as claimed in claim 2, is characterized in that, the corresponding position of the described second circular joint (401) and rear guide vane casing flange (2) is provided with some return air holes (3).
4. induced draught fan bearing housing cooling air system as claimed in claim 3, it is characterized in that, arrange 19 return air holes (3), the aperture of each return air hole (3) is Ф 38mm, and return air hole (3) flow area is 21537 mm
2.
5. induced draught fan bearing housing cooling air system as claimed in claim 4, it is characterized in that, the wide end diameter of described tapering transition cooling duct (5) is Φ 300, and narrow end diameter is Φ 150.
6. induced draught fan bearing housing cooling air system as claimed in claim 5, it is characterized in that, described cooling blower (8) selects 9-19 № 5A type cooling blower, and necessary electromotor power is 7.5kW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420569544.5U CN204200693U (en) | 2014-09-30 | 2014-09-30 | Induced draught fan bearing housing cooling air system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420569544.5U CN204200693U (en) | 2014-09-30 | 2014-09-30 | Induced draught fan bearing housing cooling air system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204200693U true CN204200693U (en) | 2015-03-11 |
Family
ID=52658657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420569544.5U Expired - Fee Related CN204200693U (en) | 2014-09-30 | 2014-09-30 | Induced draught fan bearing housing cooling air system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204200693U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108058658A (en) * | 2016-11-09 | 2018-05-22 | 通用汽车环球科技运作有限责任公司 | Push-in type grommet |
| CN111974506A (en) * | 2020-09-16 | 2020-11-24 | 四川新鑫元农牧机械有限公司 | Main shaft assembly capable of rapidly cooling by utilizing wind speed airflow |
-
2014
- 2014-09-30 CN CN201420569544.5U patent/CN204200693U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108058658A (en) * | 2016-11-09 | 2018-05-22 | 通用汽车环球科技运作有限责任公司 | Push-in type grommet |
| CN111974506A (en) * | 2020-09-16 | 2020-11-24 | 四川新鑫元农牧机械有限公司 | Main shaft assembly capable of rapidly cooling by utilizing wind speed airflow |
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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: 20150311 Termination date: 20210930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |