CN2455366Y

CN2455366Y - Impeller pulverizer

Info

Publication number: CN2455366Y
Application number: CN 00265014
Authority: CN
Inventors: 潘维亚
Original assignee: GANSU LEINUO HEAT-EXCHANGE EQUIPMENT Co Ltd
Current assignee: GANSU LEINUO HEAT-EXCHANGE EQUIPMENT Co Ltd
Priority date: 2000-12-10
Filing date: 2000-12-10
Publication date: 2001-10-24
Anticipated expiration: 2010-12-10

Abstract

The utility model relates to a pulverizer, which is used for making powder materials, particularly a pulverizer used for producing superfine powder. The utility model comprises a material inlet pipe, a material returning pipe and a material outlet pipe which are arranged on a pulverizing cavity, the pulverizing cavity, an impeller which is arranged in the pulverizing cavity, a drive shaft which is arranged on the impeller, and a power device which can drive the rotation of the impeller. Blades are uniformly arranged on two surface of the impeller. The rotation direction of each blade is same. A concave diversion groove is arranged on each blade. A concave opening of the diversion groove points to the cut direction of the rotation of the impeller.

Description

A kind of vane type reducing mechanism

The utility model relates to a kind of reducing mechanism that is used to produce dusty material, particularly a kind of reducing mechanism that is used for the production superfines.With regard to broken working mechanism of the present utility model, it be utilize the impeller blade when rotating in mill chamber turbulization, material is pulverized.The utility model comprises mill chamber, is positioned at the impeller of mill chamber, is positioned at the driving shaft on the impeller, be positioned at feed pipe, feed back pipe and discharge nozzle on the mill chamber, and the power set of drives impeller rotation, the two sides on impeller is provided with blade, and each blade rotation direction is identical.

China utility model patent ZL96215209.9 discloses the reducing mechanism that a kind of name is called " two-sided impeller coal pulverizer ".The feature of this patent is on the armature spindle that is positioned at the metal mill chamber impeller to be set, and fixes 4 to 8 blades on the wheel hub both sides of impeller, and from the Figure of description of this patent disclosure as seen, the cross section of blade is a rectangle, that is to say that each blade is a plane blade.This patent in use is negative pressure in the impeller two sides, thereby pulverized material is leaked out from impeller spindle, and this patent also has advantages such as efficient is high, good crushing effect.China utility model patent ZL96215249.8 disclosed " apparatus with characters of high performance coal saving and combustion aid for industrial boilers " and Chinese invention patent application 96108744.7 disclosed " impeller coal pulverizer with dual suction and dual pulverization structure " are basic identical with the technical characterictic of ZL96215209.9 patent.But a common deficiency of this class device is that blade wear is quite serious in the broken operation of conducting powder, when particularly pulverizing the higher material of hardness with this class device.And the position that heavy wear takes place is the tangential side of the rotation of blade.Owing to blade can lose efficacy in very short time internal cause wearing and tearing, this has influenced the application of existing apparatus.Adopting hard, high-abrasive material in general is a kind of scheme of dealing with problems as blade material.

The purpose of this utility model provides a kind ofly can have high crush efficiency, and good crushing effect can reduce the reducing mechanism of blade wear simultaneously.

The purpose of this utility model is passed through the transformation of the blade of existing two-sided vane type reducing mechanism is realized, its concrete way is to change existing plane blade into have guiding gutter profiled blade, be the guiding gutter that spill is set on each blade of existing two-sided impeller reducing mechanism more exactly, and the spill opening of guiding gutter point to the tangential of wheel rotation.

On each blade of the present utility model a plurality of guiding gutters can be set, but the inventor is recommended in a guiding gutter is set on each blade.

In embodiment of the present utility model, its impeller diameter: width of blade: the guiding gutter degree of depth is to have effect preferably at 100: 15～25: 3～6 o'clock.For making device of the present utility model can adapt to the pulverizing of multiple material, particularly be applicable to the hard material of pulverizing as the carborundum class in addition, in mill chamber of the present utility model, can be lined with wear-resisting corundum material.

During device busy of the present utility model because the special shape that blade has, when its when rotating, can assemble metastable one deck gas blanket at the inner surface of spill guiding gutter.Pulverized material particle can be separated with blade surface during the broken operation of this gas blanket conducting powder, perhaps when clashing into blade, plays on the material particle certain cushioning effect, and work as the material particle at blade surface, particularly when the guiding gutter inner surface of blade was done relative motion, this gas blanket can play certain effect of " lubricating ".So just reduced to be alleviated the wearing and tearing of blade in comminution process greatly greatly by the effect of comminuting matter to blade surface.

Description of drawings

Fig. 1 is the overall structure schematic diagram of an embodiment of the utility model.Fig. 2 is the impeller front view.Fig. 3 is a B-B echelon sectional view among Fig. 2.Fig. 4 be among Fig. 1 A-A to cutaway view.

Among the figure: 1 is impeller drive shaft, and 2 is hopper, and 3 is mill chamber, 4 is feed pipe, and 5 is main shaft bearing, and 6 is impeller, 7 for being lining in the corundum in the mill chamber, 8 is the feed back pipe, and 9 is discharging opening, and 10 is drive motors, 11 is the device switch board, 12 is blade, and 13 for being located at the guiding gutter on the blade, and 14 is the guiding gutter female parts.

Below the utility model is carried out detailed explanation with accompanying drawing in conjunction with the embodiments

Show as Fig. 1, be provided with impeller 6 in the mill chamber 3 of the present utility model, be connected with driving shaft 1 by the key cooperation on impeller 6, be provided with feed pipe 4 and feed back pipe 8 at the middle part of mill chamber 3, be provided with discharge nozzle 9 at the mill chamber top, motor 10 drives impeller 3 are rotated.Whole device is controlled by switch board 11.Can connect screening plant on the discharge nozzle 9 of the present utility model.

Show as Fig. 2, be fixed with blade 12 on the two sides of impeller, referring to Fig. 3, blade 12 is crooked shape, and the rotation direction of each blade is identical, the direction of rotation when its crooked projection points to impeller work.

Show as Fig. 3, on the fixing blade 12 in the two sides of impeller 3, have guiding gutter 13, and each blade is provided with a guiding gutter.From Fig. 4 as seen, the cross section of blade guiding gutter 13 is an opening rectangle, and the opening of its recess points to the direction of rotation of impeller.

In an embodiment of the present utility model, the diameter of blade is 300 millimeters, and the guiding gutter width on its individual blade is about 50 millimeters, and the water conservancy diversion groove depth is about 5 millimeters.The utility model the people think, when impeller diameter: width of blade: when the guiding gutter degree of depth is 100: 15～25: 3～6 these scopes, the effect of better effect is arranged.

According to existing theoretical reaching actual service test of the present utility model is shown, when device busy of the present utility model, its pivoting leaf sector-meeting produces strong turbulent flow in mill chamber, since in the mill chamber by the turbulent flow between comminuting matter, make the material particle that collision shear action at a high speed take place each other, therefore the utlity model has quite high crush efficiency.During the broken operation of conducting powder, be discharged into the screening plant on top under the effect of material through pulverizing by discharge nozzle 9, through the screening of screening plant oarse-grained material come back to through feed back pipe 8 and carry out fragmentation in the mill chamber at rotating vane.Simultaneously because the special shape that blade 12 has, when its when rotating, can assemble metastable one deck gas blanket at the inner surface of spill guiding gutter 13.Pulverized material particle can be separated with blade surface during the broken operation of this gas blanket conducting powder, perhaps when clashing into blade, plays on the material particle certain cushioning effect, and work as the material particle at blade surface, particularly when the guiding gutter inner surface of blade was done relative motion, this gas blanket can play certain effect of " lubricating ".So just reduced to be alleviated the wearing and tearing of blade in comminution process greatly greatly by the effect of comminuting matter to blade surface.The results showed that when adopting the utility model that carborundum is pulverized, prolong more than 50% the service life that the blade of the no guiding gutter that the same material of comparable usefulness in the service life of its blade is made is pulverized same material.

Claims

1, a kind of vane type reducing mechanism, comprise mill chamber, be positioned at the impeller of mill chamber, be positioned at the driving shaft on the impeller, be positioned at feed pipe, feed back pipe and discharge nozzle on the mill chamber, and the power set of drives impeller rotation, two sides on impeller is provided with blade, and each blade rotation direction is identical, it is characterized in that impeller is provided with the guiding gutter of spill, and the spill opening of guiding gutter points to the tangential of wheel rotation.

2, vane type reducing mechanism according to claim 1 is characterized in that being provided with a guiding gutter on every blade.

3, vane type reducing mechanism according to claim 2 is characterized in that the impeller diameter of guiding gutter: width of blade: the guiding gutter degree of depth equals 100: 15～and 25: 3～6.

4, according to claim 1 or 2 or 3 described vane type reducing mechanisms, it is characterized in that in mill chamber, being lined with wear-resisting corundum material.