CN204082582U - Centrifugal blower - Google Patents
Centrifugal blower Download PDFInfo
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- CN204082582U CN204082582U CN201420499191.6U CN201420499191U CN204082582U CN 204082582 U CN204082582 U CN 204082582U CN 201420499191 U CN201420499191 U CN 201420499191U CN 204082582 U CN204082582 U CN 204082582U
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- pipeline section
- bearing housing
- centrifugal blower
- outlet tube
- air outlet
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Abstract
The utility model discloses a kind of centrifugal blower, comprise wind wheel and bearing housing, also comprise and connect the air outlet tube of wind wheel and the negative-pressure guide device of bearing housing, air channel is provided with in this negative-pressure guide device, the one end in this air channel is communicated with air outlet tube, the other end in air channel and the chamber of bearing housing, the high velocity air in air outlet tube forms negative pressure through air channel in bearing housing.The centrifugal blower that the utility model provides, can take away the heat in bearing housing on the one hand, thus reduces the temperature of bearing housing inside, extends the working life of its bearing; On the other hand, in the process of air circulation, certain negative pressure can be formed inside and outside bearing housing, by the effect of negative pressure, greatly can improve the leakage scenarios of bearing housing shaft seal lubricating end surface oil.
Description
Technical field
The utility model relates to centrifugal device technical field of structures, particularly relates to a kind of centrifugal blower.
Background technique
High-speed centrifugal fan is widely used in all trades and professions of China's industrial field, 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 protection.
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 the reason of each equipment manufacturer in process equipment and manufacturing technology, and the defect etc. of unit in charge of construction installation precision aspect at the scene, often easily there is the phenomenons such as the seepage of Bearing Temperature and shaft seal lubricating end surface 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 cost of production of enterprise, shortens the working life of equipment, causes unnecessary waste, but also pollute the environment.
Model utility content
Main purpose of the present utility model is to provide a kind of centrifugal blower, is intended to the Seepage solving shaft seal lubricating end surface oil.
For achieving the above object, the utility model provides a kind of centrifugal blower, comprise wind wheel and bearing housing, also comprise and connect the air outlet tube of described wind wheel and the negative-pressure guide device of described bearing housing, air channel is provided with in this negative-pressure guide device, the one end in this air channel is communicated with described air outlet tube, and the other end in described air channel and the chamber of described bearing housing, the high velocity air in described air outlet tube forms negative pressure by described air channel in described bearing housing.
Preferably, described negative-pressure guide device comprise be communicated with described air outlet tube the first pipeline section, with the second pipeline section of the chamber of described bearing housing and the 3rd pipeline section being communicated with 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 air outlet tube is its upper-end surface, and the angle that the upper-end surface of described first pipeline section and its axis are formed is 20 to 40 to spend.
Preferably, one end that described first pipeline section connects described 3rd pipeline section is provided with moves back plug for what be connected with described 3rd pipeline section.
Preferably, described second pipeline section is provided with the valve for controlling its inner air channel switch.
Preferably, described valve is ball valve.
Preferably, described second pipeline section comprises the bend loss of the straight length that is communicated with described 3rd pipeline section and 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 are threaded.
Preferably, one end of described 3rd pipeline section of described straight length connection is provided with and moves back plug for what be connected with described 3rd pipeline section.
Preferably, described centrifugal blower also comprises fixing card, and the joint of the joint of described first pipeline section and described 3rd pipeline section and described second pipeline section and described 3rd pipeline section all uses described fixing kayser tight.
The centrifugal blower that the utility model 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 reduce the temperature of bearing housing inside, extend the working life of its bearing.On the other hand, in the process of air circulation, certain negative pressure can be formed inside and outside bearing housing, by the effect of negative pressure, greatly can improve the leakage scenarios of bearing housing shaft seal lubricating end surface oil.In addition, by arranging negative-pressure guide device, not only greatly can improve the working life of centrifugal blower, and the user cost of centrifugal blower can be saved, meanwhile, because improve the working life of centrifugal blower, the pollution because obsolete equipment causes therefore also can be reduced, effective environmental protect, reaches not only energy-conservation but also effect of environmental protection.In addition, the centrifugal blower that the present embodiment proposes, has the advantage that principle is simple and reliable, intention is novel, technique is advanced and with low cost, is easy to transform on original centrifugal blower, simultaneously safe and reliable, can obtain considerable economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model centrifugal blower preferred embodiment;
The details structure for amplifying schematic diagram that Fig. 2 is the A place shown in Fig. 1;
Fig. 3 is for the B shown in Fig. 2 is to partial structurtes view;
Fig. 4 is the partial duty principle schematic of the utility model centrifugal blower middle (center) bearing case;
Fig. 5 is the structural representation of negative-pressure guide device in the utility model centrifugal blower preferred embodiment;
Fig. 6 is the structural representation of the first pipeline section in the utility model centrifugal blower preferred embodiment;
Fig. 7 is the structural representation of straight length in the utility model centrifugal blower preferred embodiment;
Fig. 8 is the structural representation of bend loss in the utility model centrifugal blower preferred embodiment.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
It should be noted that, in description of the present utility model, term " transverse direction ", " longitudinal direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, be not indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
Referring to figs. 1 through the structural representation that Fig. 3, Fig. 1 are the utility model centrifugal blower preferred embodiment; The details structure for amplifying schematic diagram that Fig. 2 is the A place shown in Fig. 1; Fig. 3 is for the B shown in Fig. 2 is to partial structurtes view.In Fig. 1, direction shown in arrow represents air circulation direction.
In this preferred embodiment, centrifugal blower comprises wind wheel 40 and bearing housing 20, main shaft 205 is arranged on bearing housing 20 and is rotationally connected with bearing housing 20, the two ends of main shaft 205 are fixedly connected with wind wheel 40 with motor 50 respectively, centrifugal blower also comprises the air outlet tube 10 and the negative-pressure guide device 30 of bearing housing 20 that connect wind wheel 40, air channel is provided with in this negative-pressure guide device 30, the one end in this air channel is communicated with air outlet tube 10, the other end in air channel and the chamber of bearing housing 20, the high velocity air in air outlet tube 10 forms negative pressure by air channel in bearing housing 20.
Represent air circulation 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, and 204 is seal gland, and 205 is main shaft.Centrifugal blower working procedure is as follows: motor 50 works and drives main shaft 205 to rotate, and then drive the wind wheel 40 be fixedly connected with main shaft 205 to rotate, the intake grill of air through the left side (left side refers to the direction shown in Fig. 1) of centrifugal blower herein enters, blow out through air outlet tube 10, bearing housing 20 is provided with bearing 203, bearing 203 is sheathed on main shaft 205, and bearing housing 20 pairs of bearings 203 play a part to support and lubrication, meanwhile, bearing housing 20 bears the axis and radial force that centrifugal blower operationally produces.P1 is the chamber internal air pressure of bearing housing 20, and P2 is barometric pressure.In the working procedure of centrifugal blower, because wind wheel 40 rotates, air enters through the intake grill of wind wheel 40, air outlet tube 10 through wind wheel 40 flows out, and because being provided with air channel in negative-pressure guide device 30, therefore, air outlet tube 10 is communicated with the chamber of bearing housing 20, therefore the air can taken away in the air circulation process at air outlet tube 10 place in the chamber of bearing housing 20, simultaneously, the cool air of outside then to be held concurrently temperature measuring hole by the air hole 206(of bearing housing 20 both sides), and the micro-gap (two gaps are the right side one shown in Fig. 1 and right two arrows respectively) between seal gland 204 and main shaft 205 enters in the chamber of bearing housing 20, form airflow circulating, thus negative pressure is formed in bearing housing 20.When wind wheel 40 is in running state, when negative-pressure guide device 30 is not opened, P1 is greater than P2; When negative-pressure guide device 30 is opened, P1 is 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 be taken away on the one hand, thus reduce the temperature of bearing housing 20 inside, extend the working life of its bearing.On the other hand, in the process of air circulation, bearing housing 20 is inside and outside can form certain negative pressure, by the effect of negative pressure, greatly can improve the leakage scenarios of bearing housing 20 shaft seal lubricating end surface oil.In addition, by arranging negative-pressure guide device 30, not only greatly can improve the working life of centrifugal blower, and the user cost of centrifugal blower can be saved, meanwhile, because improve the working life of centrifugal blower, the pollution because obsolete equipment causes therefore also can be reduced, effective environmental protect, reaches not only energy-conservation but also effect of environmental protection.In addition, the centrifugal blower that the present embodiment proposes, has the advantage that principle is simple and reliable, intention is novel, technique is advanced and with low cost, is easy to transform on original centrifugal blower, simultaneously safe and reliable, can obtain considerable economic benefit and social benefit.
Particularly, in the present embodiment, in conjunction with reference Fig. 5 to Fig. 8, negative-pressure guide device 30 comprise be communicated with air outlet tube 10 the first pipeline section 31, with the second pipeline section 32 of the chamber of bearing housing 20 and the 3rd pipeline section 33 being communicated with 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 also can adopt rigid pipe or the flexible pipe of one whole, as long as realize the chamber of air outlet tube 10 and bearing housing 20.
In the present embodiment, preferably the first pipeline section 31 and the second pipeline section 32 are rigid pipe, are because be now convenient to be tightly connected with air outlet tube 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 all tightly connected with air outlet tube 10 and bearing housing 20 respectively by the mode of welding.Use electric drill on air outlet tube 10, bore the oval hole (with reference to Fig. 3) of a diameter 10mm, then one end of the first pipeline section 31 is welded with air outlet tube 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, because wind wheel 40 operationally can produce vibrations, the effect that flexible pipe plays buffering between the first pipeline section 31 and the second pipeline section 32 is set, reduces the vibrations operationally of this centrifugal blower, thus improve the working 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 air outlet tube 10 is its upper-end surface, and the angle that the upper-end surface of the first pipeline section 31 and its axis are formed is 20 to 40 to spend.In the present embodiment, the angle that the upper-end surface of the first pipeline section 31 and its axis are formed is 30 degree.
When the angle that upper-end surface and its axis of the first pipeline section 31 are formed is excessive, can make can not form negative pressure in the chamber of bearing housing 20, and the angle that the upper-end surface of the first pipeline section 31 and its axis are formed too small time, negative pressure is excessive, easily the lubricant oil in bearing housing 20 is taken away, therefore, the angle that the upper-end surface of the first pipeline section 31 and its axis are formed need arrange suitable guarantee both can form negative pressure in bearing housing 20, can not take the lubricant 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 inner air channel switch.Valve 34 also can control the size in its inner air channel on the second pipeline section 32, thus the vacuum magnitude of adjustment bearing housing 20.
In the present embodiment, by arranging valve 34, both ensureing that the lubricant oil in bearing housing 20 can not be pumped, also can play effect of cooling leak-stopping simultaneously.
Further, in the present embodiment, valve 34 is ball valve.Ball valve has the advantage that mobility is good, switch is easy to adjust, cost is low and easy to maintenance.
Particularly, in the present embodiment, in conjunction with reference to Fig. 5, Fig. 7 and Fig. 8, the second pipeline section 32 comprises the straight length 321 that is communicated with the 3rd pipeline section 33 and the bend loss 322 with the chamber of bearing housing 20, and the two ends of valve 34 connect straight length 321 and bend loss 322 respectively.The bend pipe of bend loss 322 for having 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.
Particularly, in conjunction with reference Fig. 7 and Fig. 8, straight length 321 and bend loss 322 are with valve 34 and are threaded.Be threaded and there is installation and removal advantage simply and easily.
In the present embodiment, be provided with the screw thread that about 10mm is long at the two ends of bend loss 322.One end of straight length 321 is provided with the long screw thread of 10mm.
Further, in conjunction with reference to Fig. 6 and Fig. 7, in the present embodiment, one end that the first pipeline section 31 connects the 3rd pipeline section 33 is provided with moves back plug for what be connected with the 3rd pipeline section 33.One end that straight length 321 connects the 3rd pipeline section 33 is provided with moves back plug for what be connected with the 3rd pipeline section 33.
In the present embodiment, the length of the first pipeline section 31 moving back plug is about 20mm, and the overall length of the first pipeline section 31 is 300 ~ 400mm.The length of straight length 321 moving back plug is about 10mm.Straight length 321 overall length is 200 ~ 300mm.
Further, this centrifugal blower also comprises fixing card (not shown), and the joint of the first pipeline section 31 and the 3rd pipeline section 33 and the joint of the second pipeline section 32 and the 3rd pipeline section 33 all use fixing kayser tight.In the present embodiment, by arranging the sealing of fixing card raising first pipeline section 31 and the joint of the 3rd pipeline section 33 and the joint of the second pipeline section 32 and the 3rd pipeline section 33, thus improve the structural reliability of this centrifugal blower.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a centrifugal blower, comprise wind wheel and bearing housing, it is characterized in that, also comprise and connect the air outlet tube of described wind wheel and the negative-pressure guide device of described bearing housing, air channel is provided with in this negative-pressure guide device, the one end in this air channel is communicated with described air outlet tube, and the other end in described air channel and the chamber of described bearing housing, the high velocity air in described air outlet tube forms negative pressure by described air channel in described bearing housing.
2. centrifugal blower as claimed in claim 1, it is characterized in that, described negative-pressure guide device comprise be communicated with described air outlet tube the first pipeline section, with the second pipeline section of the chamber of described bearing housing and the 3rd pipeline section being communicated with 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.
3. centrifugal blower as claimed in claim 2, it is characterized in that, described first pipeline section is steel pipe, and the end face that described first pipeline section is connected with described air outlet tube is its upper-end surface, and the angle that the upper-end surface of described first pipeline section and its axis are formed is 20 to 40 to spend.
4. centrifugal blower as claimed in claim 2, is characterized in that, one end that described first pipeline section connects described 3rd pipeline section is provided with moves back plug for what be connected with described 3rd pipeline section.
5. as the centrifugal blower in claim 2 to 4 as described in any one, it is characterized in that, described second pipeline section is provided with the valve for controlling its inner air channel switch.
6. centrifugal blower as claimed in claim 5, it is characterized in that, described valve is ball valve.
7. centrifugal blower as claimed in claim 5, is characterized in that, described second pipeline section comprises the bend loss of the straight length that is communicated with described 3rd pipeline section and the chamber with described bearing housing, and the two ends of described valve connect described straight length and bend loss respectively.
8. centrifugal blower as claimed in claim 7, it is characterized in that, described straight length and described bend loss are with described valve and are threaded.
9. centrifugal blower as claimed in claim 7, is characterized in that, one end of described 3rd pipeline section of described straight length connection is provided with moves back plug for what be connected with described 3rd pipeline section.
10. centrifugal blower as claimed in claim 9, is characterized in that, also comprise fixing card, the joint of the joint of described first pipeline section and described 3rd pipeline section and described second pipeline section and described 3rd pipeline section all uses described fixing kayser tight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420499191.6U CN204082582U (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420499191.6U CN204082582U (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
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| Publication Number | Publication Date |
|---|---|
| CN204082582U true CN204082582U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420499191.6U Active CN204082582U (en) | 2014-09-01 | 2014-09-01 | Centrifugal blower |
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| CN (1) | CN204082582U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196737A (en) * | 2014-09-01 | 2014-12-10 | 中国一冶集团有限公司 | Centrifugal fan |
| CN106402012A (en) * | 2016-09-30 | 2017-02-15 | 大唐桂冠合山发电有限公司 | Vertically split type bearing box of centrifugal fan |
| CN111457510A (en) * | 2020-04-02 | 2020-07-28 | 武汉市研华智造环保科技有限公司 | Humidification device on cooling fan |
-
2014
- 2014-09-01 CN CN201420499191.6U patent/CN204082582U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196737A (en) * | 2014-09-01 | 2014-12-10 | 中国一冶集团有限公司 | Centrifugal fan |
| CN106402012A (en) * | 2016-09-30 | 2017-02-15 | 大唐桂冠合山发电有限公司 | Vertically split type bearing box of centrifugal fan |
| CN111457510A (en) * | 2020-04-02 | 2020-07-28 | 武汉市研华智造环保科技有限公司 | Humidification device on cooling fan |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |