A two-stage oblique flow fan
A kind of oblique flow fan, oblique flow technology, applied in mechanical equipment, machine/engine, liquid fuel engine, etc., which can solve the problems of low specific speed and total pressure efficiency, etc.
Inactive Publication Date: 2019-07-09
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0015] The invention provides a two-stage oblique flow fan, which solves the problems of low specific speed and total pressure efficiency existing in the existing oblique flow fan, and fills the gap in the fan field in the manufacture of medium wind pressure and flow fans. For pipeline pressurization and air supply and exhaust
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[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0041] Such as figure 1 As shown, the present invention includes an outer casing 10, a front inner tube 20, a front guide vane 30, a front motor 40, a rear inner tube 50, a rear guide vane 60 and a rear motor 70;
[0042] The outer casing 10 is a hollow rotating body, an open air inlet is formed at the front end, and an open air outlet is formed at the rear end;
[0043] The front inner tube 20 is a hollow rotating body, and is fixed to the inner wall of the front part of the outer casing 10 by a plurality of front guide vanes 30 evenly distributed around its outer surface, and the front motor 40 is fixed to the front inner wall by a front support member 41 In the pipe 20, the front rotating shaft 42 is driven by the motor shaft, and the front end of the front rotating shaft 42 is connected to the front wheel hub 43. The front wheel hub 43 is in the sh...
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The invention relates to a two-stage diagonal fan, belongs to the diagonal fan type mechanical devices, solves the problem that existing diagonal fans are not high in specific speed and total pressureefficiency, and is applied to a bladeless fan and a pipeline fan. The two-stage diagonal fan provided by the invention comprises an outer shell, a front inner pipe, a front guide blade, a front motor, a back inner pipe, a back guide blade and a back motor, wherein the front motor, a front rotary shaft, a front wheel, a front blade and the front guide blade form a first-stage diagonal fan, and theback motor, a back rotary shaft, a back wheel, a back blade and a back guide blade form a second-stage diagonal fan. The front and back blades are crankled blades, so that the efficiency of the fan can be improved effectively; triangular sawteeth distributed along the spanwise directions of the blades are arranged on the back edges of the blades, so that the noise level of the motor can be reduced. The two-stage diagonal fan provided by the invention can further enhance the wind pressure, can be applied to a tubular structure where a centrifugal fan cannot be used, and can overcome on-way resistance of a pipeline to send out an air flow, so that defects of an axial flow fan without sufficient pressure rise can be overcome, and the two-stage diagonal fan also has obvious advantages in blast capacity compared with that of the centrifugal fan.
Description
technical field [0001] The invention belongs to mechanical devices of oblique flow fans, and is mainly applied to bladeless fans and pipeline fans. Background technique [0002] As a ventilation device, the fan is a representative mechanical device widely used to increase the gas pressure and discharge the gas. A fan usually includes a casing and an impeller inside it. The impeller is a rotating assembly consisting of multiple blades fixed on a hub. The blades work in a fluid, and most fans are driven by a motor. [0003] At present, the common ventilators on the market are mainly axial flow fans and centrifugal fans. The axial flow fans have blades that force the air to move parallel to the axis of blade rotation. It has a large air volume, but the wind pressure is insufficient; The air inlet of the fan blows air at right angles, and rotates the air outward to the outlet. It has high wind pressure, but the air volume is insufficient, and the limitation of the shape makes i...
Claims
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IPC IPC(8): F04D25/08F04D29/26F04D29/40F04D29/44F04D29/66
CPCF04D25/0606F04D25/08F04D29/26F04D29/403F04D29/441F04D29/666F05D2240/121F05D2240/122F05D2240/30F05D2240/303F05D2240/304
Inventor 智博文张师帅匡海云王钰陈俊君
Owner HUAZHONG UNIV OF SCI & TECH