CN104196737B - Centrifugal blower - Google Patents
Centrifugal blower Download PDFInfo
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- CN104196737B CN104196737B CN201410441659.0A CN201410441659A CN104196737B CN 104196737 B CN104196737 B CN 104196737B CN 201410441659 A CN201410441659 A CN 201410441659A CN 104196737 B CN104196737 B CN 104196737B
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- pipeline section
- bearing housing
- centrifugal blower
- discharge pipe
- air channel
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Abstract
The invention discloses a kind of centrifugal blower, including wind wheel and bearing housing, also include the negative-pressure guide device of discharge pipe and the bearing housing connecting wind wheel, it is provided with air channel in this negative-pressure guide device, the one end in this air channel connects with discharge pipe, the other end in air channel and the chamber of bearing housing, the high velocity air in discharge pipe forms negative pressure through air channel in bearing housing. Centrifugal blower provided by the invention, can taking away the heat in bearing housing on the one hand, thus reducing the temperature within bearing housing, extending the service life of its bearing; On the other hand, in the process of air's circulation, certain negative pressure can be formed inside and outside bearing housing, by the effect of negative pressure, it is possible to significantly improve the leakage scenarios of bearing housing axle end-blocking face lubricating oil.
Description
Technical field
The present invention relates to centrifugal device technical field of structures, particularly relate to a kind of centrifugal blower.
Background technology
High-speed centrifugal fan is widely used in all trades and professions of China's industrial circle, particularly uses more in the industry such as metallurgy, electric power, petrochemical industry, mine. The safe and efficient use of high-speed centrifugal fan is not only directly connected to technological innovation and the upgrading of product, and is related to environmental conservation.
The large centrifugal fan overwhelming majority of the industrial use of China is home equipment. Find in actual use, the imperfection considered due to designer or each equipment manufacturer reason in process equipment and manufacturing technology, and the defect etc. of unit in charge of construction's installation accuracy aspect at the scene, tend to occur the phenomenon such as seepage of Bearing Temperature and axle end-blocking face lubricating oil. Oil seepage is a commonplace phenomenon, is never well solved for a long time. The long-term seepage of fluid not only increases the production cost of enterprise, shortens the service life of equipment, causes unnecessary waste, but also pollute the environment.
Summary of the invention
Present invention is primarily targeted at a kind of centrifugal blower of offer, it is intended to solve the Seepage of axle end-blocking face lubricating oil.
For achieving the above object, the present invention provides a kind of centrifugal blower, including wind wheel and bearing housing, also include the negative-pressure guide device of discharge pipe and the described bearing housing connecting described wind wheel, it is provided with air channel in this negative-pressure guide device, the one end in this air channel connects with described discharge pipe, and the chamber of the other end in described air channel and described bearing housing, the high velocity air in described discharge pipe forms negative pressure by described air channel in described bearing housing.
Preferably, described negative-pressure guide device includes the second pipeline section of the chamber of the first pipeline section and the described bearing housing connected with described discharge pipe and connects the 3rd pipeline section of the first pipeline section and the second pipeline section, wherein, described 3rd pipeline section is flexible pipe, and described first pipeline section and the second pipeline section are rigid pipe.
Preferably, described first pipeline section is steel pipe, and the end face that described first pipeline section is connected with described discharge pipe is its upper surface, and the angle that the upper surface of described first pipeline section and its axis are formed is 20 to 40 degree.
Preferably, one end that described first pipeline section connects described 3rd pipeline section is provided with for moving back plug with described 3rd pipeline section is connected.
Preferably, described second pipeline section is provided with the valve for controlling its internal air channel switch.
Preferably, described valve is ball valve.
Preferably, described second pipeline section includes the straight length that connects with described 3rd pipeline section and the bend loss of the chamber with described bearing housing, and the two ends of described valve connect described straight length and bend loss respectively.
Preferably, described straight length and described bend loss are with described valve and threaded.
Preferably, described straight length connects one end of described 3rd pipeline section and is provided with for moving back plug with described 3rd pipeline section is connected.
Preferably, described centrifugal blower also includes fixing card, and described first pipeline section all uses described fixing card locking with the junction of described 3rd pipeline section and described second pipeline section with the junction of described 3rd pipeline section.
The centrifugal blower that the present invention proposes, by arranging negative-pressure guide device, utilizes principle of negative pressure, by the mode of negative-pressure guide, force the air circulation in bearing housing, the heat in bearing housing can be taken away on the one hand, thus reducing the temperature within bearing housing, extend the service life of its bearing. On the other hand, in the process of air's circulation, certain negative pressure can be formed inside and outside bearing housing, by the effect of negative pressure, it is possible to significantly improve the leakage scenarios of bearing housing axle end-blocking face lubricating oil. Additionally, by arranging negative-pressure guide device, it is possible not only to be greatly improved the service life of centrifugal blower, and the use cost of centrifugal blower can be saved, meanwhile, because improve the service life of centrifugal blower, the pollution because obsolete equipment causes therefore also can be reduced, effectively improve environment, reach energy-saving and environment-friendly effect. It addition, the centrifugal blower that the present embodiment proposes, there is the advantage that principle is simple and reliable, intention is novel, technique is advanced and with low cost, it is easy to transform on original centrifugal blower, simultaneously safe and reliable, it is possible to obtain considerable economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of centrifugal blower preferred embodiment of the present invention;
Fig. 2 is the details structure for amplifying schematic diagram at the A place shown in Fig. 1;
Fig. 3 is the B shown in Fig. 2 to partial structurtes view;
Fig. 4 is the partial duty principle schematic of centrifugal blower middle (center) bearing case of the present invention;
Fig. 5 is the structural representation of negative-pressure guide device in centrifugal blower preferred embodiment of the present invention;
Fig. 6 is the structural representation of the first pipeline section in centrifugal blower preferred embodiment of the present invention;
Fig. 7 is the structural representation of straight length in centrifugal blower preferred embodiment of the present invention;
Fig. 8 is the structural representation of bend loss in centrifugal blower preferred embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
It should be noted that, in describing the invention, term " transverse direction ", " longitudinal direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, be not instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention. Additionally, term " first ", " second " etc. are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
Referring to figs. 1 through the structural representation that Fig. 3, Fig. 1 are centrifugal blower preferred embodiment of the present invention; Fig. 2 is the details structure for amplifying schematic diagram at the A place shown in Fig. 1; Fig. 3 is the B shown in Fig. 2 to partial structurtes view. In Fig. 1, direction shown in arrow represents air circulating direction.
In this preferred embodiment, centrifugal blower includes wind wheel 40 and bearing housing 20, main shaft 205 is arranged on bearing housing 20 and bearing housing 20 is rotationally connected, the two ends of main shaft 205 are fixing with wind wheel 40 with motor 50 respectively to be connected, centrifugal blower also includes the negative-pressure guide device 30 of the discharge pipe 10 and bearing housing 20 connecting wind wheel 40, it is provided with air channel in this negative-pressure guide device 30, the one end in this air channel connects with discharge pipe 10, the chamber of the other end in air channel and bearing housing 20, the high velocity air in discharge pipe 10 forms negative pressure by air channel in bearing housing 20.
Representing air circulating direction with reference to direction shown in arrow in Fig. 1 and Fig. 4, Fig. 4, in Fig. 4,201 is end cap, and 202 is bearing, and 203 is sealing member, and 204 is seal gland, and 205 is main shaft. centrifugal blower work process is as follows: motor 50 work drives main shaft 205 to rotate, and then drive rotates with the fixing wind wheel 40 being connected of main shaft 205, the air inlet in the left side (left side refers to the direction shown in Fig. 1 herein) of air blower fan by centrifugation enters, blow out through discharge pipe 10, being provided with bearing 203 on bearing housing 20, bearing 203 is sheathed on main shaft 205, and bearing 203 is acted the effect supporting and lubricating by bearing housing 20, meanwhile, bearing housing 20 bears the axial and radial force that centrifugal blower operationally produces. P1 is the chamber internal gas pressure of bearing housing 20, and P2 is atmospheric pressure. in the work process of centrifugal blower, because wind wheel 40 rotates, air enters through the air inlet of wind wheel 40, flow out through the discharge pipe 10 of wind wheel 40, and because being provided with air channel in negative-pressure guide device 30, therefore, discharge pipe 10 connects with the chamber of bearing housing 20, therefore the air circulation process at discharge pipe 10 place can be taken away the air in the chamber of bearing housing 20, simultaneously, the cold air of outside is then held concurrently thermometer hole by the air-vent 206(of bearing housing 20 both sides), and minim gap between seal gland 204 and main shaft 205 (two gaps are the right side one shown in Fig. 1 and right two arrows respectively) enters in the chamber of bearing housing 20, form circulation of air flow, thus forming negative pressure in bearing housing 20. when wind wheel 40 is when running status, when negative-pressure guide device 30 is not switched on, P1 is more than P2, when negative-pressure guide device 30 is opened, P1, less than P2, forms negative pressure.
The centrifugal blower that the present embodiment proposes, by arranging negative-pressure guide device 30, utilize principle of negative pressure, by the mode of negative-pressure guide, force the air circulation in bearing housing 20, the heat in bearing housing 20 can being taken away on the one hand, thus reducing the temperature within bearing housing 20, extending the service life of its bearing. On the other hand, in the process of air's circulation, bearing housing 20 is inside and outside can form certain negative pressure, by the effect of negative pressure, it is possible to significantly improve the leakage scenarios of bearing housing 20 axle end-blocking face lubricating oil. Additionally, by arranging negative-pressure guide device 30, it is possible not only to be greatly improved the service life of centrifugal blower, and the use cost of centrifugal blower can be saved, meanwhile, because improve the service life of centrifugal blower, the pollution because obsolete equipment causes therefore also can be reduced, effectively improve environment, reach energy-saving and environment-friendly effect. It addition, the centrifugal blower that the present embodiment proposes, there is the advantage that principle is simple and reliable, intention is novel, technique is advanced and with low cost, it is easy to transform on original centrifugal blower, simultaneously safe and reliable, it is possible to obtain considerable economic benefit and social benefit.
Specifically, in the present embodiment, in conjunction with reference to Fig. 5 to Fig. 8, negative-pressure guide device 30 includes the second pipeline section 32 of the chamber of the first pipeline section 31 and bearing housing 20 connected with discharge pipe 10 and connects the 3rd pipeline section 33 of the first pipeline section 31 and the second pipeline section 32, wherein, 3rd pipeline section 33 is flexible pipe, and the first pipeline section 31 and the second pipeline section 32 are rigid pipe. Certainly, in other variant embodiment, negative-pressure guide device 30 may be used without rigid pipe or the flexible pipe of whole, as long as realizing the chamber of discharge pipe 10 and bearing housing 20.
In the present embodiment, it is preferable that the first pipeline section 31 and the second pipeline section 32 are rigid pipe, it is because now being easy to be tightly connected with discharge pipe 10 and bearing housing 20, thus improve the functional reliability of centrifugal blower. In the present embodiment, the first pipeline section 31 and the second pipeline section 32 are tightly connected with discharge pipe 10 and bearing housing 20 respectively each through the mode welded. Use electric drill to bore the oval hole (with reference to Fig. 3) of a diameter 10mm on discharge pipe 10, then one end of the first pipeline section 31 is welded with discharge pipe 10. Second pipeline section 32 is welded on the tank filler sleeve of bearing housing 20.
Arranging the 3rd pipeline section 33 is flexible pipe, it is because wind wheel 40 and operationally can produce vibrations, flexible pipe being set between the first pipeline section 31 and the second pipeline section 32, plays the effect of buffering, reducing the vibrations operationally of this centrifugal blower, thus improve the job stability of this centrifugal blower.
Further, in conjunction with reference to Fig. 5 and Fig. 6, the first pipeline section 31 is steel pipe, and the end face that the first pipeline section 31 is connected with discharge pipe 10 is its upper surface, and the angle that the upper surface of the first pipeline section 31 and its axis are formed is 20 to 40 degree. In the present embodiment, the angle that the upper surface of the first pipeline section 31 is formed with its axis is 30 degree.
When the upper surface of the first pipeline section 31 is excessive with the angle that its axis is formed, can make can not be formed in the chamber of bearing housing 20 negative pressure, and angle that the upper surface of the first pipeline section 31 and its axis are formed too small time, negative pressure is excessive, easily the lubricating oil in bearing housing 20 is taken away, therefore, the angle that the upper surface of the first pipeline section 31 and its axis are formed need to arrange suitable guarantee both can form negative pressure in bearing housing 20, will not take the lubricating oil in bearing housing 20 away simultaneously.
Further, with reference to Fig. 5, the second pipeline section 32 is provided with the valve 34 for controlling its internal air channel switch. Valve 34 also can control the size in its internal air channel on the second pipeline section 32, thus adjusting the vacuum magnitude of bearing housing 20.
In the present embodiment, by arranging valve 34, both ensure that the lubricating oil in bearing housing 20 will not be pumped, may also function as effect of cooling leak-stopping simultaneously.
Further, in the present embodiment, valve 34 is ball valve. Ball valve has that activeness is good, it is easy to adjust to switch, advantage that cost is low and easy to maintenance.
Specifically, in the present embodiment, in conjunction with reference to Fig. 5, Fig. 7 and Fig. 8, the second pipeline section 32 includes the straight length 321 that connects with the 3rd pipeline section 33 and the bend loss 322 of the chamber with bearing housing 20, and the two ends of valve 34 connect straight length 321 and bend loss 322 respectively. Bend loss 322 is have the bend pipe of 90 degree. Straight length 321 and bend loss 322 are steel pipe. In the present embodiment, the first pipeline section 31, straight length 321 and bend loss 322 are DN(nominal diameter) steel pipe of 20mm, the 3rd pipeline section 33 is the plastic flexible pipe of the inner liner metal silk of DN20mm, and valve 34 is the stainless steel ball valve of DN20.
Specifically, in conjunction with reference to Fig. 7 and Fig. 8, straight length 321 and bend loss 322 are with valve 34 threadeds. Threaded have the advantage installed with easy removal.
In the present embodiment, it is provided with the screw thread of about 10mm length at the two ends of bend loss 322. One end of straight length 321 is provided with the screw thread of 10mm length.
Further, in conjunction with reference to Fig. 6 and Fig. 7, in the present embodiment, the first pipeline section 31 connects one end of the 3rd pipeline section 33 and is provided with for moving back plug with the 3rd pipeline section 33 is connected. Straight length 321 connects one end of the 3rd pipeline section 33 and is provided with for moving back plug with the 3rd pipeline section 33 is connected.
In the present embodiment, the length that the first pipeline section 31 moves back plug is about 20mm, and the overall length of the first pipeline section 31 is 300 ~ 400mm. The length moving back plug on straight length 321 is about 10mm. Straight length 321 overall length is 200 ~ 300mm.
Further, this centrifugal blower also includes fixing card (not shown), and the junction of the first pipeline section 31 and the 3rd pipeline section 33 and the junction of the second pipeline section 32 and the 3rd pipeline section 33 all use fixing card locking. In the present embodiment, improve the junction of the first pipeline section 31 and the 3rd pipeline section 33 and the sealing of the junction of the second pipeline section 32 and the 3rd pipeline section 33 by arranging fixing card, thus improve the structural reliability of this centrifugal blower.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention and accompanying drawing content to make, or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (6)
1. a centrifugal blower, including wind wheel and bearing housing, it is characterized in that, also include the negative-pressure guide device of discharge pipe and the described bearing housing connecting described wind wheel, it is provided with air channel in this negative-pressure guide device, the one end in this air channel connects with described discharge pipe, the chamber of the other end in described air channel and described bearing housing, and the high velocity air in described discharge pipe forms negative pressure by described air channel in described bearing housing;
Described negative-pressure guide device includes the second pipeline section of the chamber of the first pipeline section and the described bearing housing connected with described discharge pipe and connects the 3rd pipeline section of the first pipeline section and the second pipeline section, wherein, described 3rd pipeline section is flexible pipe, and described first pipeline section and the second pipeline section are rigid pipe; Described second pipeline section is positioned at the top of bearing housing;
The end face that described first pipeline section is connected with described discharge pipe is its upper surface, and the angle that the upper surface of described first pipeline section and its axis are formed is 20 to 40 degree; Described second pipeline section is provided with the valve for controlling its internal air channel switch; Described valve is ball valve.
2. centrifugal blower as claimed in claim 1, it is characterised in that one end that described first pipeline section connects described 3rd pipeline section is provided with for moving back plug with described 3rd pipeline section is connected.
3. centrifugal blower as claimed in claim 1, it is characterised in that described second pipeline section includes the straight length that connects with described 3rd pipeline section and the bend loss of the chamber with described bearing housing, and the two ends of described valve connect described straight length and bend loss respectively.
4. centrifugal blower as claimed in claim 3, it is characterised in that described straight length and described bend loss are with described valve threadeds.
5. centrifugal blower as claimed in claim 3, it is characterised in that described straight length connects one end of described 3rd pipeline section and is provided with for moving back plug with described 3rd pipeline section is connected.
6. centrifugal blower as claimed in claim 5, it is characterised in that also including fixing card, described first pipeline section all uses described fixing card locking with the junction of described 3rd pipeline section and described second pipeline section with the junction of described 3rd pipeline section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441659.0A CN104196737B (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441659.0A CN104196737B (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
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| CN104196737A CN104196737A (en) | 2014-12-10 |
| CN104196737B true CN104196737B (en) | 2016-06-15 |
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| CN201410441659.0A Active CN104196737B (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108150455A (en) * | 2018-01-31 | 2018-06-12 | 长安益阳发电有限公司 | A kind of heat power plant boiler air-introduced machine and cooling means |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179941A (en) * | 1991-12-27 | 1993-07-20 | Mitsubishi Electric Corp | Motor driven pump for secondary air supply of catalytic converter for vehicle |
| CN202867352U (en) * | 2012-07-20 | 2013-04-10 | 湖北省风机厂有限公司 | Air cooling device for bearing of large centrifugal fan |
| CN202867354U (en) * | 2012-09-28 | 2013-04-10 | 合肥振邦鼓风机有限责任公司 | Novel air-cooled high-pressure blower |
| CN204082582U (en) * | 2014-09-01 | 2015-01-07 | 中国一冶集团有限公司 | Centrifugal blower |
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