CN201694899U - Impeller for large-power inverted umbrella-shaped surface aerator - Google Patents

Abstract

The utility model relates to an impeller for a large-power inverted umbrella-shaped surface aerator. The impeller comprises a rotating shaft which is coaxially and rotatably connected with a power output shaft and at least two of work blades which are connected with the rotating shaft, wherein a rib plate which is used for supporting the blades is fixedly connected between the rotating shaft and the blades, the board surface of each blade is straight and parallel with the shaft core wire of the rotating shaft, and the axial size of the root of each blade is larger than the axial size of the outer end of each blade and is less than the axial size of the middle of each blade. Compared with the conventional blade, the blade on the impeller has larger superficial area, greatly improves the impeller transporting capability, the waste water mixing capability, the waste water feeding capability and the oxygenating capability, and has reasonable size and good generality.

Description

High-power inversed umbrella type surface aeration machine impeller

Technical field

The utility model relates to a kind of surface aeration machine impeller, specifically the impeller that uses on powerful inversed umbrella type surface aeration machine exactly.

Background technology

The inversed umbrella type surface aeration machine is an equipment commonly used in the sewage purification, comprises impeller, step-down gear, lifting device and motor etc.Wherein, the blade of impeller extending radially outwardly along the rotating shaft in mid-way.During work, the actuating unit impeller is around the rotation of axle core, and under the powerful prograding of impeller, water is the water curtain shape and throws away from the impeller edge, form hydraulic jump, wrap up in into a large amount of air,, bring in constant renewal in liquid level because sewage circulates up and down, the sewage big area is contacted with air, airborne oxygen is dissolved in rapidly in the sewage, finish the oxygenation to sewage, the while impeller also promotes drainage flow and thorough mixing sewage prevents sludge settling.

But the blade of prior art is usually located at the inner axial dimension maximum of rotating shaft place, and it is more little to extend its axial dimension more outward, and just the plate face of blade is narrow more, and is reliable with the intensity that guarantees blade, fractureed when being unlikely to rotate; But so just limited the surface-area of blade, the area that blade is contacted with sewage is less, and impeller is given sewage oxygenation and the ability of combined sewage and the scarce capacity of plug-flow so.Perhaps in order to guarantee that its work capacity just must wholely increase impeller size, but the oxidation ditch general size is narrower, that is to say that such impeller versatility is poor.

Summary of the invention

The purpose of this utility model just provides the high-power inversed umbrella type surface aeration machine impeller of a kind of excellent working performance and highly versatile.

The scheme that adopts is exactly: a kind of high-power inversed umbrella type surface aeration machine impeller, comprise and constitute the rotating shaft that coaxial rotation is connected with power output shaft and be connected at least two working-blades in the rotating shaft, be connected with the gusset that is used for support blade between rotating shaft and the blade, the plate face of blade is straight and be parallel to the shaft core line of rotating shaft, root of blade along the size of axial length direction greater than the axial dimension of its outer end less than the axial dimension of middle portion.

As shown from the above technical solution: the blade middle portion plate face of impeller of the present utility model is the wideest, the inner slightly narrow strength of joint that guarantees itself and rotating shaft simultaneously, so just under the prerequisite that does not increase blade length, increased the area of whole blade, increased effective contact area of itself and sewage simultaneously, impeller is carried, combined sewage and improve for the ability of sewage oxygenation greatly, the diameter of impeller is reasonable simultaneously, not only satisfy the use needs of the oxidation ditch of more different sizes, improve the versatility of impeller, strengthened the strength of joint of blade and rotating shaft simultaneously, improve the work-ing life of impeller, municipal sewage plant or industrial sewage treatment plant that such impeller is specially adapted to big yield use.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1.

Embodiment

A kind of high-power inversed umbrella type surface aeration machine impeller as shown in Figure 1 and Figure 2 comprises rotating shaft 1 and the impeller 2 that is connected in the rotating shaft 1, and rotating shaft 1 is a tubular shaft, can reduce its quality like this under the prerequisite of the mechanical property that does not reduce rotating shaft 1, saves material.The upper end of rotating shaft 1 is connected with flange 4, and is connected with power output shaft by flange 4, power output shaft rotation and driving rotating shaft 1 coaxially rotates.The plate face of blade 2 of the present utility model is roughly parallel with the length direction or the title shaft core line direction of rotating shaft 1, and blade 2 has two at least, and preferably 7 or 8, serviceability is the most reliable like this, does not also increase the materials and the manufacturing cost of blade 2 simultaneously; The plate face of blade 2 is straight and be parallel to rotating shaft 1 radially, and the corner dimension of 2 of adjacent blades equates that also can be described as the axle core centrosymmetry of blade 2 about rotating shaft 1, as shown in Figure 2, it is steady to be beneficial to wheel rotation.

Improvement of the present utility model is: the plate face centre of blade 2 is wide, two ends are slightly narrow, specifically be exactly as shown in Figure 1, one end plate face width degree of the close rotating shaft 1 of blade 2 or claim that axial dimension is littler than the axial dimension at blade 2 middle parts, just the axial dimension away from the end of rotating shaft 1 is big than blade 2 outer ends, in other words be exactly the section axial size maximum of blade 2 between inside and outside two ends, take second place in the inner, the outer end minimum.So than the existing blade 2 of equal length, the wideest narrow more blade 2 of plate face that stretches out more then of inner segment just, blade 2 of the present utility model is because wide middle, so the plate face area of whole blade 2 enlarges markedly, so the working area of blade 2, promptly increase with the contact area of sewage, such impeller is given all corresponding raising of ability of ability, combined sewage and the plug-flow of sewage oxygenation, and the complete machine serviceability improves greatly.Because the length of blade 2 just radial dimension does not increase, the risk that blade is fractureed does not obviously increase.

Therefore such impeller serviceability height is particularly suitable for using on powerful aerator, carries out high rotating speed, the aeration operation of big flow.

Blade 2 plate face areas are bigger, so in order further to reduce its risk because of fractureed by resistance, be necessary the affixed gusset 3 that is used to strengthen the structural strength of blade 2 between rotating shaft 1 and blade 2, the plate face of gusset 3 tilts up or down along the radially setting of rotating shaft 1 or according to use occasion, but radially to be provided with the most general along rotating shaft 1; Gusset 3 can be fixed in the position of rotating shaft 1 and blade 2 connection sections, stretches out then to be connected with blade 2; Also can only be connected between the blade 2.Gusset 3 of the present utility model is a disc, is fixed in the upper end of rotating shaft 1, corresponding hole is set on the gusset 3 just can be fixed on easily between rotating shaft 1 and the flange 4, and need not other fixation.Correspondingly the upper end of blade 2 just is fixed on the lower face of gusset 3, the equal in length of the length of gusset 3 and blade 2, just blade 2 outer ends are concordant with gusset 3 outer ends, so neither waste the material of gusset 3, guarantee that again whole blade 3 is all supported, and the gusset 3 of this global shape not only is convenient to processing and assembling, and overall construction intensity is good, long service life.

In order further to increase the area of blade 2, do not increase the length of blade 2 simultaneously, the plate face of blade 2 can extend on the upper face of gusset 3; Also can be described as blade 2 and comprise part that is positioned on gusset 3 lower faces and the part that is positioned on gusset 3 upper faces, wherein, the part of lower face is similar to hypotenuse right-angled trapezium down, and the position is minimum but protrude downwards its hypotenuse middle part; The part that is positioned on gusset 3 upper faces of blade 2 is similar to right-angle triangle, and an one square edge 21 is connected with gusset 3, and another square edge 22 is vertical with gusset 3 outer rims and overlap with the outside square edge of aforesaid right-angled trapezium; So not only can increase the ability of stirring and combined sewage, and because near gusset 3, so it is also reliable and stable to be positioned at blade 2 structural strengths of gusset 3 upper faces, but because gusset 3 has constituted separation to the upper and lower sewage of its plate face, the mixed effect of the 2 pairs of sewage of blade on gusset 3 upper faces is limited, so it is too big also to need not area along the blade 2 of gusset 3 upper face settings, rule of thumb 2 need of blade extend upward small portion in the outer end of gusset 3 and get final product, so neither increase manufacturing cost, play the purpose that strengthens the impeller serviceability again.Because the utility model is mainly used on the powerful inversed umbrella type surface aeration machine, so the diameter of impeller and weight are bigger usually, therefore the utility model is symmetrically welded 3 or 4 hangers 5 on the upper face of gusset 3, weight handling equipment can connect hanger 5 easily with rope and then impeller sling like this, so that transportation and installing.

Upper and lower relation described in the literary composition is with the situation shown in Fig. 1, also is simultaneously that the situation of impeller working order is that example illustrates, is not the qualification to blade wheel structure itself.

Claims (5)

1. high-power inversed umbrella type surface aeration machine impeller, comprise and constitute the rotating shaft (1) that coaxial rotation is connected with power output shaft and be connected at least two working-blades (2) in the rotating shaft (1), be connected with the gusset (3) that is used for support blade (2) between rotating shaft (1) and the blade (2), it is characterized in that: the plate face of described blade (2) is straight and be parallel to the shaft core line of rotating shaft (1), blade (2) root along the size of axial length direction greater than the axial dimension of its outer end less than the axial dimension of middle portion.

2. high-power inversed umbrella type surface aeration machine impeller according to claim 1, it is characterized in that: described blade (2) is symmetrical arranged along the periphery of rotating shaft (1), described gusset (3) is disc and the upper end that is fixed in rotating shaft (1), and the plate face of gusset (3) is vertical with the shaft core line of rotating shaft (1).

3. high-power inversed umbrella type surface aeration machine impeller according to claim 2, it is characterized in that: described blade (2) has 7, the radial dimension of its length and gusset (3) coincide, the axial dimension of its root coincide with the length of rotating shaft (1), and blade (2) comprises the part that is positioned on gusset (3) lower face and is positioned at the part of gusset (3) upper face edge.

4. high-power inversed umbrella type surface aeration machine impeller according to claim 3 is characterized in that: described rotating shaft (1) is a tubular shaft, and the central position of the upper face of gusset (3) is affixed to be used for power output shaft flange connecting (4).

5. high-power inversed umbrella type surface aeration machine impeller according to claim 4 is characterized in that: be welded with on the upper face of described gusset (3) and be used for hanger (5) that impeller is sling.

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