CN2262619Y

CN2262619Y - Mixed flow ventilator

Info

Publication number: CN2262619Y
Application number: CN 95240360
Authority: CN
Inventors: 曹广清; 曹广明; 范永强; 陆美琴
Original assignee: NANTONG JINGHAI HEATING VENTILATING EQUIPMENT PLANT
Current assignee: NANTONG JINGHAI HEATING VENTILATING EQUIPMENT PLANT
Priority date: 1995-08-16
Filing date: 1995-08-16
Publication date: 1997-09-17
Anticipated expiration: 2005-08-16

Abstract

The utility model relates to a mixed flow ventilator composed of an impeller, a machine casing, an inlet air collection device, an outlet flow guiding sheet, an air guiding cylinder, an air cylinder, a motor, etc. The utility model is energy-saving high-efficiency ventilating machinery. The utility model is characterized in that the impeller is connected to a hub through many twisting wing-shaped blades having the characteristic of meridian acceleration; the cross section of each blade forms a streamline shape and has favorable aerodynamic performance; as favorable air flow of an inlet and an outlet is connected with a pipe network, the air flow distribution is good, and the air pressure is stable. Compared with a metal mixed flow ventilator, the mixed flow ventilator has the advantages of small specific weight, low noise, power consumption saving, corrosion resistance and long service life.

Description

Mixed flow fan

Mixed flow fan belongs to a kind of ventilating machinary.

Existing axial fan air quantity is big, but blast is low.Centrifugal fan blast height, but air quantity is little, instability.The metallic plate punching that existing metallic mixed flow fan blade is a uniform thickness is shaped, weldering is extremely on wheel hub, unadjustable angle and air quantity, blade and air friction coefficient are big, add factors such as sound wave resonance, so noise is up to more than 98 decibels, so the metal flow-mixing blower fan is than great, the noise height, not corrosion-resistant, power consumption is big.

The utility model provides a kind of new design proposal of mixed flow fan, purpose be realize ventilator have higher blast, big air quantity, in light weight, noise is low, the requirement of power consumptive province.

The concrete technological scheme of mixed flow fan is to realize like this, mixed flow fan is made up of impeller, casing, import wind collecting unit, outlet guide plate, air conducting tube, air duct and motor etc., it is characterized in that impeller is that fusiform twisted blade is contained on the wheel hub by the cross section with meridian acceleration characteristics, wheel hub is contained on the motor reel, cowling is contained in the outside of motor shaft end wheel hub, cowling, impeller and wheel hub can freely rotate with motor reel, and the inlet side is the integral inlet wind collecting unit of being made up of wind collecting unit shell, sound-absorbing web plate etc.Motor periphery, outlet port is fixed with air conducting tube, with the coaxial outermost surface of air conducting tube be air duct, the guide plate that fixed in space between air conducting tube and air duct has favorable current to reverse, casing is partly formed by two, preceding (right side) is the wind collecting unit shell, back (left side) is an air duct, is connected into garden tubular integral body with flange between air duct and import wind collecting unit shell.The air-flow that the impeller rotation is agitated guides it to flow out along air duct inwall tangent direction from the space between air conducting tube and the air duct by the guide plate that favorable current flows to.The sound-absorbing web plate two ends of import wind collecting unit inboard are horn mouth, and the centre is the waist shape of garden arc transition, to obtain bigger air quantity and blast.Be covered with closeer sound-absorbing aperture on the sound-absorbing web plate, filling glass wool in the interlayer between sound-absorbing web plate and shell is to strengthen the absorbing sound and lowering noise effect.In order to lower the resistance of blade to air-flow as far as possible, the profile of fan blade is wing by the distortion of meridian acceleration curve, 15 ° to 45 ° of twist angles, cross section is a streamline, and the two sides of blade is a high strength glass fiber reinforced plastic, filling rigid foam in the interlayer, make its light weight, good rigidly.The glass fibre reinforced plastics of blade and guide plate is with minute surface mold pressing casting, and is surperficial like mirror-smooth, minimum to resistance of air.For adapting to the variation needs of airflow pressure, 0 ° to 90 ° of the established angle of blade and guide plate is adjustable.

Owing on structure and technology, guaranteed the technical performance of this blower fan, and had positive effect.Complete machine is except that motor, and all the other members all adopt the high strength glass steel composite material, light weight, smooth, friction factor is little, energy consumption is low, has aerodynamic performance preferably, noise low (68～82db), can realize adjustable to airflow pressure, using effect is comparatively satisfied.

Mixed flow fan is further described for embodiment below in conjunction with accompanying drawing 1.

Fig. 1 is the mixed flow fan plan view, among the figure: 1, be air duct, 2, be the outlet guide plate, 3, be motor, 4, be air conducting tube, 5, be impeller hub, 6, be cross section wind loop triangular in shape, this encloses guide functions, stops air-flow to become turbulent flow at damned dihedral, and 7, be fan blade, 8, be motor reel, 9, be glass wool, 10, be cowling, 11, be support, 12, be the import wind collecting unit, 13, be wind collecting unit sound-absorbing web plate, being covered with on it has the sound-absorbing aperture, and 14, for import wind collecting unit shell.In these parts, air guide sleeve 10, wheel hub 5, blade 7 rotate with motor reel 8, and remaining part all maintains static.Air flow direction when direction shown in the arrow among Fig. 1 is the mixed flow fan running.

Claims

1, mixed flow fan is by impeller, casing, the import wind collecting unit, the outlet guide plate, air conducting tube, composition such as air duct and motor, it waits to levy is that impeller is that fusiform twisted blade is contained on the wheel hub by the cross section with meridian acceleration characteristics, wheel hub is contained on the motor reel, cowling is contained in the outside of motor shaft end wheel hub, the inlet side is the integral inlet wind collecting unit of being made up of wind collecting unit shell and sound-absorbing web plate, motor periphery, outlet port is fixed with air conducting tube, with the coaxial outermost of air conducting tube be air duct, the guide plate that the fixed in space between air conducting tube and air duct has favorable current to reverse.

2, it is characterized in that according to the described mixed flow fan of claim 1 the sound-absorbing web plate two ends of import wind collecting unit inboard are horn mouth, the centre is the waist shape of the lonely transition in garden, filling glass wool in the aperture that on the sound-absorbing web plate, is covered with comparatively dense, the interlayer between sound-absorbing web plate and shell.

3, according to the described mixed flow fan of claim 1, it is characterized in that casing partly forms by two, preceding (right side) is the wind collecting unit shell, afterwards (left side) is air duct, connects into garden tubular integral body with flange between wind collecting unit shell and air duct.

4,, it is characterized in that two surfaces of blade are high strength glass fiber reinforced plastic, filling rigid foam in the interlayer according to the described mixed flow fan of claim 1.

5,, it is characterized in that the blade twist angle is 15 ° to 45 ° according to the described mixed flow fan of claim 1.

6,, it is characterized in that 0 ° to 90 ° of the established angle of blade and guide plate is adjustable according to the described mixed flow fan of claim 1.