CN2796336Y - Negative pressure fan - Google Patents
Negative pressure fan Download PDFInfo
- Publication number
- CN2796336Y CN2796336Y CN 200520090276 CN200520090276U CN2796336Y CN 2796336 Y CN2796336 Y CN 2796336Y CN 200520090276 CN200520090276 CN 200520090276 CN 200520090276 U CN200520090276 U CN 200520090276U CN 2796336 Y CN2796336 Y CN 2796336Y
- Authority
- CN
- China
- Prior art keywords
- fan
- negative pressure
- blade wheel
- bearing
- belt pulley
- 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
The utility model discloses a negative pressure fan comprising a fan shell body, a vacuum nozzle, a fan blade wheel, a fan shaft and a belt pulley. The negative pressure fan is characterized in that the fan shaft is installed at the front part of the fan shell body through one bearing with the bearing. The front end of the fan shaft is provided with the belt pulley, and the back end of the fan shaft is provided with the fan blade wheel. An intermediate pipe is sheathed and installed on the fan shaft between the bearings. A carrier ring is installed between the bearing of one side approaching the fan blade wheel and the fan blade wheel, and the vacuum nozzle is fixed at the back end of the fan shell body. Compared with the existing fan, the negative pressure that the blade wheel of the utility model generates is as high as 800 millimeter water column when the blade wheel rotates in normal high speed. Seed adhesion in a seeding machine can be adequately ensured. The negative pressure fan can adapt the work capacity of more than nine-row double seeding monomer and has better application foreground.
Description
(1) technical field
The utility model relates to a kind of negative-pressure air fan, particularly relates to the negative-pressure air fan that a kind of pneumatic seeder seeding is used.
(2) background technology
Negative-pressure air fan is the critical component that the seeding unit absorbed seed of pneumatic seeder is used, and the air communication of its generation is crossed air intake duct makes the air flue of air-suction chamber produce negative pressure.When the suction hole of seed plate changes the aspiration road over to, aperture one side is a negative pressure, opposite side then just has been in kind of the district of filling of seed chamber, seed promptly is being attracted under the pressure differential effect on the seed plate hole, seed rotates with seed plate, when seed forwards the aspiration road to when terminal, negative pressure finishes, and seed falls in the kind bed that plough leaves by deadweight.Therefore existing negative-pressure air fan can not guarantee the adhesive force of seed in the seeding unit because the negative pressure value that produces is lower, and can not adapt to the work capacity of the above two bar seeding monomers of nine row.
(3) summary of the invention
The purpose of this utility model is to provide a kind of negative pressure value height, can fully guarantee the negative-pressure air fan of seed adhesive force in the seeding unit.
The technical scheme that adopts is:
A kind of negative-pressure air fan comprises Fan casing, vacuum noz(zle), draught fan impeller, blower fan axle, belt pulley.The blower fan axle is installed in front portion in the Fan casing by pair of bearings, the two ends of blower fan axle are equiped with belt pulley and draught fan impeller respectively, pipe between being set with on the blower fan axle between two bearings is fixed on the rear end of Blower Housing near being equiped with packing ring, vacuum noz(zle) between the bearing of draught fan impeller one side and the draught fan impeller.
The utility model is compared with existing blower fan, its impeller is when normal high speed rotating, and the negative pressure value of generation can fully guarantee seed adhesive force in the seeding unit up to 800 millimeters high water columns, and blower fan can adapt to the work capacity that surpasses the above two bar seeding monomers of nine row, has application promise in clinical practice.
(4) description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
(5) embodiment
See also Fig. 1, a kind of negative-pressure air fan of the present utility model comprises Blower Housing 1, vacuum noz(zle) 2, draught fan impeller 3, blower fan axle 4, belt pulley 5.Fan casing 1 is fastened by forward and backward housing and forms, and is fixed by bolt 6, and blower fan axle 4 is installed in the front portion of Blower Housing 1 by two bearings 7,8.The front end of blower fan axle 4 is equipped with belt pulley 5 by key 17, the rear end of blower fan axle 4 is equipped with draught fan impeller 3 with key 18, belt pulley 5 gives backstop by the back-up ring 8 that is installed in draught fan impeller 3 front ends, in case belt pulley 5 is loosening, back-up ring 9 is fixed on the front end of blower fan axle 4 by bolt 10, two bearings 7, manage 11 between being equipped with on the blower fan axle 4 between 8, the rear that is positioned at bearing 8 on the impeller shaft 4 is equipped with circlip 12, be equiped with packing ring 13 between bearing 8 and the draught fan impeller 3, the rear end of draught fan impeller 3 is equipped with locking plate 14, moving to prevent the draught fan impeller string, locking plate 14 usefulness nuts 16 are fixed on the rear end of blower fan axle 4, and vacuum noz(zle) 2 is fixed on the back casing of Blower Housing 1 by bolt 15.
Claims (1)
1, a kind of negative-pressure air fan comprises Blower Housing (1), vacuum noz(zle) (2), draught fan impeller (3), blower fan axle (4), belt pulley (5); It is characterized in that described blower fan axle (4) is installed in the front portion of Blower Housing (1) by bearing (7) and bearing (8), the front end of blower fan axle (4) is equiped with belt pulley (5), the rear end of blower fan axle (4) is equiped with draught fan impeller (3), pipe between being set with on the blower fan axle (4) between bearing (7) and the bearing (8), be equiped with packing ring (13) between the bearing of close draught fan impeller (3) one sides and the draught fan impeller (3), vacuum noz(zle) (2) is fixed on the rear end of Blower Housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520090276 CN2796336Y (en) | 2005-04-13 | 2005-04-13 | Negative pressure fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520090276 CN2796336Y (en) | 2005-04-13 | 2005-04-13 | Negative pressure fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2796336Y true CN2796336Y (en) | 2006-07-19 |
Family
ID=36867577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520090276 Expired - Fee Related CN2796336Y (en) | 2005-04-13 | 2005-04-13 | Negative pressure fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2796336Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104525A (en) * | 2012-12-13 | 2013-05-15 | 昆山俊润通风降温设备有限公司 | Negative-pressure fan |
| CN107736112A (en) * | 2017-12-01 | 2018-02-27 | 南京农业大学 | A kind of mechanical strength combined type vegetables precise seeder |
| CN112913391A (en) * | 2021-04-16 | 2021-06-08 | 吉林省农业机械研究院 | Seeding device |
-
2005
- 2005-04-13 CN CN 200520090276 patent/CN2796336Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104525A (en) * | 2012-12-13 | 2013-05-15 | 昆山俊润通风降温设备有限公司 | Negative-pressure fan |
| CN107736112A (en) * | 2017-12-01 | 2018-02-27 | 南京农业大学 | A kind of mechanical strength combined type vegetables precise seeder |
| CN107736112B (en) * | 2017-12-01 | 2023-12-08 | 南京农业大学 | Mechanical and pneumatic combined vegetable precision seed sowing device |
| CN112913391A (en) * | 2021-04-16 | 2021-06-08 | 吉林省农业机械研究院 | Seeding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 |