CN2035351U - Energy-saving oxygen increasing machine - Google Patents

Abstract

The utility model discloses an energy-saving oxygen increase machine by which the methods that the blade shape and the pack element of a turbine are changed, a diversion hood is additionally arranged, etc. are adopted to increase the partial or integral boundary constraint made to water quality masses by an impeller body to make the most parts of the water quality masses entered into the impeller can traverse water surface to be mixed with air sufficiently, the oxygen increase effect is enhanced, the idle work consumption of rotation energy increased by energy is only sucked by the water quality masses when the turbine is not provided with the boundary constraint is reduced, and thus the goal of energy-saving is obtained.

Description

Energy-saving oxygen increasing machine

The utility model belongs to fishery machinery.

Oxygenating machine is mainly used in culture fishery, also is used for industrial sewage and handles.The oxygenation way in fish pond has ventilation oxygenation, vane type oxygenation and pump to spray three kinds of basic modes of oxygenation.Compare with other dual modes, the vane type oxygenation effect is good, simple in structure, is most widely used a kind of fish pond oxygen-increasing device at present.

The ZY type impeller automatic aerator of Jiangsu agricultural machinery institute, Taihu Lake, Wuxi fishing machine factory joint research and development, its outlet South East Asia and other third world countries are the most extensive at the use face of China, are more typical impeller oxygen-increasing devices, and Fig. 1 is its structural representation.(1) be that electric motor, (2) are supporting bar for the blade of impeller, (5) for support buoys, (6) for impeller hub, (4) for reduction gear housing, (3).

The power of electric motor 1 is passed to the wheel hub 3 of bottom impeller by reduction gear housing 2, the drives impeller rotation.Wheel hub is a handstand frustum, and the semi-cone angle of frustum is 50 °～60 °, and the ratio of upper and lower bottom surface radius is 3:1～4:1, inside and outside two-layer large and small blade 4 is housed on its conical surface, every layer of each 12 blade have certain included angle with cone element, and are not orthogonal to the conical surface.Whole device is fixed by supporting bar 6 with floating drum 5 and is bubbled through the water column.

During the impeller rotation, promote the contiguous water of blade and outwards spray away, and near the conical surface, cause low pressure area, the water of lower floor is attracted up along the conical surface.The globule that sprays out makes oxygen dissolution in water with the air thorough mixing.The water of acquisition dissolved oxygen is fallen the water surface and is splash spray, makes water dissolved oxygen once again.Like this, fish pond lower floor anoxybiotic water is constantly attracted to come up, and sprinkling is gone out, and falls into the water again behind the dissolved oxygen.So move in circles, behind the start certain hour, originally anoxybiotic water has just had enough dissolved oxygens of keeping animal life in the water.

The key part that plays the oxygenation effect in this device is an impeller.At present, what the home and abroad produced impeller automatic aerator has a hundreds of producer, and the structure formation of impeller is varied.But from the impeller automatic aerator performance measurement result that China in 1987 holds, oxygenation efficient is also generally lower.The oxygenation efficient mean value of ten 3KW impeller automatic aerators of participating in the experiment be 1.46(kilogram oxygen/kilowatt-hour), Schwellenwert 1.17, maximum 1.66.The A level and the B grade standard of the 3KW impeller automatic aerator oxygenation efficient of Ministry of Agriculture, Animal Husbandry and Fisheries's promulgation are respectively 1.65,1.49, and as seen, the current mean value of measuring does not still reach the B grade standard.Though this class oxygenating machine generally uses in the fish pond at home, and exported South East Asia, but consider from energy-conservation angle, still not ideal enough, its reason is that the impeller lower edge lacks the constraint of limit wall, makes the water quality group that just enters impeller just not leave impeller before reaching the water surface and then passing through the water surface, and their absorb the energy of impeller rotates own acquisition in water energy, but fail to run off the water surface and air and mix and to ooze, do not reach the purpose of oxygenation.Necessity that improvement is arranged very much.

The utility model is conceived to improve the hydrodynamic performance of impeller, increases limit wall constraint, by the appropriate design blade, at the lower edge flanging of blade, pod is set, and reduces the idle work loss of impeller, improves the oxygenation efficient of impeller, thereby reaches energy-conservation purpose.

The utility model has partly been made significant improvement to the impeller of the turbine of oxygenating machine, and the wheel hub of impeller, and wheel hub is with top comprises the transmission of whole device and the mode that installs and fixes all is harmonious substantially with aforementioned ZY type.

The utility model can be divided into two kinds of patterns.Fig. 2, Fig. 3 represent I type, II type respectively.

I type impeller is not with pod, adopts blade lower edge flanging, forms the part limit wall constraint to water quality group, is blade shape with the key distinction of ZY type impeller and installs differently that its structure formation is as follows:

On the wheel hub of taper type, there are 8～12 plate blades to become the 35 °～45 and the vertical conical surface that is installed on, blade outer end with the bus of the conical surface, knuckle is 10 °～20 ° backward, the blade lower edge is the right angle flanging forward, improving the efficient of blade, the flanging width be leaf wide 0.2～1.2.The long-width ratio of blade is 3～5, wheel speed 110～160r/min.Blade can be made with the also available highstrenghtpiston of steel plate or other matrix materials.

II type impeller band pod makes cover body form whole limit wall constraint to water quality group, and its structure formation is as follows:

The wheel hub shape is similar to the I type, and blade is done in the arc-shaped, and the outer end is knuckle no longer backward, and lower edge is flanging no longer forward also.At impeller outer, overlap a pod 7, the cone angle design of pod becomes to make the circular import sectional area of current to equal or is slightly larger than the ring exit sectional area.For reducing the entry loss of current, the import of pod is designed to tubaeform.This pod can be fixed in impeller, does to rotate synchronously with impeller, also can be fixed in the motionless position of whole device, and during the impeller rotation, it is motionless that pod keeps.The rotating speed of comparing impeller with the I type can suitably improve (1.5～5 times), and the shaft drive of two-stage tooth can change the one-level transmission into.Under same power, the size of impeller can correspondingly be dwindled.

During wheel rotation, the water that the waters in the II type impeller pod is limit by I type impeller edge folding blades, greatly part will be promoted rotation by blade, after obtaining certain pressure energy and kinetic energy, from pod or edge folding blades is suitable for reading ejects.Like this, in pod or edge folding blades is contiguous just forms low pressure area, lower layer of water is attracted up continuously and spray away.Pod or blade lower edge hemmed exist, reduced no pod or blade not during flanging impeller be consumed in the idle work that a part of water is spinned as the original place, can make the hydrodynamic efficiency of impeller improve 15～20%, thus raising oxygenation efficient.

The utility model is compared with common oxygenating machine, has following remarkable advantage:

1. hydrodynamic performance is good, and the idle work loss is few, and oxygenation efficient can improve 10～15%.If calculate to improve oxygenation efficient 10%, then every oxygenating machine can reduce 70～80 hours on times, economize on electricity 210～240 degree every year at least.

2. II type rotating speed height, the two-stage geartransmission can change the one-level transmission into.Though added pod, impeller size has been dwindled, and total materials still can reduce.If can adopt slowspeed machine (pass speed be lower than 750r/min), then can further save reduction gear housing, floating drum also can dwindle, saving of labor, material-saving, estimates that every oxygenating machine cost can reduce by 20～30% at least.

Description of drawings:

Fig. 1 .ZY type impeller automatic aerator synoptic diagram

Fig. 2 .I type blade wheel structure synoptic diagram

Fig. 3. II type blade wheel structure synoptic diagram

Claims (2)

1, an oxygenating machine is made up of drive-motor, reduction gear housing, impeller boss, blade and supporting device.Technical characterictic of the present utility model is on the wheel hub of taper type, becomes 30 °-45 with the frustum bus, perpendicular to the conical surface 8-12 plate plane blade is housed, the blade outer end is 10 °-20 ° of knuckles backward, lower edge is the right angle flanging forward, and flanging is wide to be the wide 0.2-1.2 of leaf times, and the blade long-width ratio is 3-5.

2, oxygenating machine according to claim 1, its feature also is, blade can be used as the garden arc, end of blade is not made flanging and is handled, and load onto a pod at impeller outer, the sectional area that the cone angle of pod makes the shape import of current garden equals or is slightly larger than the sectional area of ring exit, and at the flow inlet place, pod is accomplished tubaeform.

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