CN2218844Y - Oppositely rotary local fan - Google Patents
Oppositely rotary local fan Download PDFInfo
- Publication number
- CN2218844Y CN2218844Y CN 95239041 CN95239041U CN2218844Y CN 2218844 Y CN2218844 Y CN 2218844Y CN 95239041 CN95239041 CN 95239041 CN 95239041 U CN95239041 U CN 95239041U CN 2218844 Y CN2218844 Y CN 2218844Y
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Abstract
The utility model relates to an oppositely rotary local fan which is used for ventilation and dust prevention in the digging of underground projects such as non-gas mine, tunnels personal protection, etc., comprising a flow collector, a two stage machine shell, a two stage motor, two stage impellers, a constriction barrel, a front rectifying cover and a back rectifying cover. Airfoil-shaped blades are evenly used for the two stage impellers; the two stage impellers are respectively driven by one motor; the rotation directions of the two stage impeller are opposite with each other. The motor is hung by a machine shell via the support of a supporting bar. An anti-burning protecting temperature relay is inlaid in the motor; the complete machine of the oppositely rotary local fan is in separation type structure. The utility model has the advantages of simple structure, light weight, convenient operation, convenient installation, convenient maintenance, high efficiency, energy saving, anti-burning performance, single stage running, and double stage running.
Description
The utility model is an a kind of mining convection rotary type secondary fan, is applicable to that the tunneling ventilation of underground engineerings such as non-fiery mine such as metallurgy, coloured, chemical industry, building materials and tunnel, people's air defense is dustproof.
Secondary fan is the requisite supplementary equipment of excavation, and general mining partial ventilating fan is made up of a drive motor, 1-2 grades of movable vanes, 1-3 grades of fixed guide vanes and casing etc.Complex structure, efficient is low, weight is big, noise is high and motor easily to burn be present ubiquitous problems of domestic all kinds of secondary fans." well lane engineering construction handbook (Coal Industry Press, December in 1979 the 1st edition) introduced the convection rotary type secondary fan that a kind of model is JFD-50-11 (Wuhan Safety and Environmental Protection Research Institute's manufacturing) for the 8th piece 8-33, compare with axial flow secondary fan, this secondary fan has adopted the design of secondary convection rotary type, overcome the problem that axial flow secondary fan exists to a certain extent, but still exist that efficient is not high enough, power consumpiton is big, I, II level impeller are load unbalanced, the shortcoming that motor easily burns, and be monolithic construction, use inconvenience is installed.
The purpose of this utility model just provides a kind of efficient height, energy-conservation, anti-ly burns, convection rotary type secondary fan easy to use, and it can overcome the above-mentioned problems in the prior art.
The utility model convection rotary type secondary fan comprises slip ring, two-stage casing, shrink cylinder, two-stage electric motor, both stage impellers, and wherein second level impeller is installed in the back of first order impeller, and each turns to opposite each other by a motor driving; The blade of first order impeller, second level impeller is all two distortion wing blade structures; first order motor, second level motor are lifted on first order casing by they sup-port respectively; on the casing of the second level; complete machine is a split-type structural, and is separable each other: bury the anti-heat protection temperature relay that burns on three windings of first order motor, second level motor underground.
Chord lengths such as above-mentioned second level impeller employing two distortion airfoil blade and during with load design such as first order impeller maintenance, best results.For improving stream condition, forward and backward cowling is designed to the streamlined curved surface of glass fibre reinforced plastics, be directly installed on the afterbody of first order motor, second level motor respectively, constitute organic whole with anterior slip ring, rear portion shrink cylinder, this mode of structure has shortened the length of complete machine.
Above-mentioned design of the present utility model has the following advantages:
1, impeller adopts two distortion airfoil blades, and the design of load such as I and II impeller has improved efficient, has improved reverse performance.
2, motor by they sup-port on casing, motor can whole load and unload, has overcome dunnage of the prior art and has welded, the shortcoming that motor stator can not dismounting, both simplified structure, alleviated weight, reduced flowing resistance, and be convenient to processing again, install and maintenance.
3, adopt split-type structural, be convenient to single-stage operation and down-hole haulage.
4, bury the anti-heat protection temperature relay that burns in the motor underground, can effectively prevent the burnout failure that motor causes because of transship, make moist, individual event operation etc.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Accompanying drawing is the utility model convection rotary type secondary fan structural representation, comprises that slip ring 1, first order casing 11, second level casing 10, shrink cylinder 7,1 and 11,11 and 10,10 connect by flange 2 with 7; First order motor 12, second level motor 9 are respectively supported respectively by six roots of sensation strut 6 and are lifted on first order casing 11, the second level casing 10,12, bury the BW1 type temperature relay that sell in market in 9 underground: first order impeller 4 adopts two distortion airfoil blades, the number of blade is 9, the two distortion of chord lengths such as second level impeller 5 employings airfoil blade, the number of blade is 8, impeller 4,5 is driven by first order motor 12, second level motor 9 respectively, switched in opposite and two impellers are for waiting load design each other, and hub ratio is 0.54.Front fairing 13, back cowling 8 are the streamlined curved design of glass fibre reinforced plastics, are directly installed on the afterbody of first order motor 12, second level motor 9 respectively.Suspension ring 3 are welded on the casing, so that lifting.
Table 1 is the important technological parameters of the utility model embodiment DJSNO38 type and DJSNO50 type convection rotary type secondary fan
Table 1
| Model | Power of motor (KW) | Rotating speed (r/min) | Hub ratio | Impeller diameter (mm) | Complete machine weight (kg) | Air quantity (m 3/s) | Blast (Pa) | Total pressure efficiency (%) |
| DJSNO·3.8 | 2×1.1 | 2800 | 0.48 | 380 | 75 | 1.0～2.1 | 1400-750 | 85 |
| DJSNO·5.0 | 2×4.0 | 2840 | 0.54 | 500 | 160 | 2.7～4.4 | 2400-970 | 86 |
Claims (3)
1; a kind of convection rotary type secondary fan; contain slip ring; the two-stage casing; two-stage electric motor; both stage impellers; shrink cylinder; front fairing; back cowling; wherein the second level impeller in the both stage impellers is contained in the back of first order impeller; respectively by the first order motor in the two-stage electric motor; second level motor driving; turn to opposite each other; it is characterized in that; described first order impeller (4); the blade shape of second level impeller (5) is two distortion airfoils; first order motor (12); second level motor (9) is supported the first order casing (11) that is lifted in the two-stage casing respectively by strut (6); on the second level casing (10); first order casing (11); second level casing (10) connects by flange (2); separable each other, first order motor (12); be embedded with the anti-heat protection temperature relay that burns on three windings of second level motor (9).
2, convection rotary type as claimed in claim 1 secondary fan is characterized in that, chord length airfoil blades such as described second level impeller (5) employing, and with load design such as first order impeller.
3, convection rotary type as claimed in claim 1 secondary fan is characterized in that, described front fairing (13), and back cowling (8) is the streamlined curved surface of glass fibre reinforced plastics, is directly installed on the afterbody of first order motor (12), second level motor (9) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239041 CN2218844Y (en) | 1995-01-13 | 1995-01-13 | Oppositely rotary local fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239041 CN2218844Y (en) | 1995-01-13 | 1995-01-13 | Oppositely rotary local fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2218844Y true CN2218844Y (en) | 1996-01-31 |
Family
ID=33880916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95239041 Expired - Fee Related CN2218844Y (en) | 1995-01-13 | 1995-01-13 | Oppositely rotary local fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2218844Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104519A (en) * | 2012-12-13 | 2013-05-15 | 昆山俊润通风降温设备有限公司 | Negative-pressure fan |
-
1995
- 1995-01-13 CN CN 95239041 patent/CN2218844Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104519A (en) * | 2012-12-13 | 2013-05-15 | 昆山俊润通风降温设备有限公司 | Negative-pressure fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |