DE102009030396A1 - Recirculation air classifier with vibration-decoupling of classifier head and housing - Google Patents

Abstract

The circulating air elutriator (1) has an outer housing (2) with fine material cone and fine material discharge. An inner housing (3) with coarse material cone and coarse material discharge, and is arranged between the vane ring. A material feeder (7) and a ventilator (5) are provided with the inner housing. An elutriator head (4) has a supporting frame and head plate.

Description

The Invention relates to the structural design of the classifier head and the housing of a circulating wind sifter to a vibration isolation between reach both units.

State of the art

A circulating wind sifter of the generic type is from the DE 22 04 161 known. It consists of an outer housing with fine material cone and fine material discharge and an inner housing with coarse material cone and coarse material discharge. On the sifter the drives and bearing units of fan and additional fan are arranged. The latter protrudes into the inner housing together with the spreading plate. Between the inner housing and Grobgutkonus a vane ring is arranged. The classifying air is circulated by means of the fan between the inner housing and the outer housing.

Recirculating air classifiers can also be equipped with a deflecting sight instead of the additional fan, like the 1 of the DE 197 43 491 A1 shows.

By default In this classifier sifter head and housing are over connected to a flange. This flange connection is located between Top plate and outer casing. This can cause it to transfer of vibrations caused by the rotating components come the case.

Furthermore are checking or repair work on the fan or classifying wheel consuming, since first the screws of the flange connection must be solved before the sifter head of Housing can be solved and fan and Classifying wheel are accessible.

task

task The invention is to make a forced air wind sifter so that the sifter head with the rotating components vibration technology of Housing is decoupled. This usually has used rigid flange connection through a flexible connection be replaced, so that the viewing head slight movements in horizontal and vertical direction without the movement to transfer to the housing. At the same time must ensure the tightness of the machine.

solution

The Task is accomplished by a recirculating air classifier with the characteristics of Claim 1 solved. Advantageous embodiments and further developments of the invention are in the subclaims specified.

Description of the invention

Of the The classifier head consists of a support frame and the top plate. Of the Support frame forms the central component of the classifier head. Laterally are attached two circle segments which complete the top plate. The support frame consists of a U-profile to the required To achieve rigidity of the component. On the support frame are the Actuators and bearing unit for fan and indexing wheel arranged. The housing is designed as a self-supporting construction. in the Operation is the sifter head by its own weight on the housing on.

Of the Support frame of the sifter head ends in claws. At the housing are also arranged opposite claws. in the Operation is the classifier head via transition elements fixed vertically to the claws. In between is a vibration-damping Interposed arranged. In a horizontal position are sifter head and Housing fixed by pins. The tightness between the sifter head and the housing is through a labyrinth component realized with soft gaskets.

One Another advantage of the invention is the disassembly of the sifter head, without loosening a large number of screw connections. By simply lifting the sifter head, fan, Classifying wheel and spreading disc inspected for inspection or repair become.

The Construction with claws and transition elements allowed the adjustment of the gap between the classifying wheel and the inner housing during initial assembly in the radial and axial directions.

On the support frame are laterally from the storage unit for the Classifier wheel shaft and the fan shaft drives for Classifier wheel and fan arranged. The support frame together with Cover plates and motor plates form the belt gear guard.

Further Particular features and advantages of the invention will become apparent the following description of an embodiment based the drawings.

It demonstrate:

1 : Recirculating air sifter with sifter head lifted from the housing

2 : Transition and sealing system

3 : Slit design of classifying wheel and inner housing

4 : Sifter head with belt gear guard

The 1 shows the circulating wind sifter ( 1 ) with the housing ( 2 ) lifted sifter head ( 4 ). The circulating wind sifter ( 1 ) consists of an outer housing ( 2 ) with fine material cone and fines discharge and an inner housing ( 3 ) with coarse material cone and coarse material discharge, wherein between inner housing ( 3 ) and Grobgutkonus a vane ring is arranged. The classifier head ( 4 ) consists of the drives for fan ( 5 ) and indexing wheel ( 6 ) and storage unit of fan and the classifying wheel with spreading plate. Classifying wheel ( 6 ) and spreading discs (not shown) protrude into the inner housing ( 3 ) into it. The material feeder ( 7 ) takes place via a designed as a hollow shaft shaft of the classifying wheel. The classifying air is filtered by the fan ( 5 ) between inner housing ( 3 ) and outer housing ( 2 ) in circulation.

The classifier head ( 4 ) carries the rotating components fan ( 5 ), Classifying wheel ( 6 ) and the with the Sichtrad ( 6 ) associated spreading plate ( 8th ). This condition is only by lifting the sifter head ( 4 ), without loosening screw connections In this position, all critical rotating components can be inspected for control purposes or repair work. In operation, the classifier head ( 4 ) by its own weight on the housing ( 2 ), which is designed as a self-supporting construction on.

The classifier head ( 4 ) consists of the U-shaped support frame ( 9 ), which accommodates the components drives, bearing unit, material supply and the top plate ( 10 ). The supporting frame ( 9 ) ends laterally in the claws ( 11 ). The housing ( 2 ) opposite, also on both sides claws ( 12 ) out.

On the claws ( 11 ) and ( 12 ) are the adjustable transition elements ( 13 ) and ( 14 ) and between them is a vibration-damping intermediate layer ( 15 ), which transfers the weight of the classifier head into the claws of the housing.

Pencils ( 16 ) prevent the sifter head from shifting horizontally.

at The transition elements are steel plates. The vibration damping liner is made of rubber or other materials with damping properties.

The 2 shows the transition and sealing system between the classifier head ( 4 ) and housing ( 2 ).

The transition element ( 13 ) is with the claw ( 12 ) of the housing by screws ( 17 ) in generous screw holes ( 18 ) connected in a horizontal position adjustable. The transition element ( 14 ) firmly carries the pins ( 16 ) and in loose pad the vibration damping liner ( 15 ). The transition element ( 14 ) is with the claws ( 11 ) of the classifier head ( 4 ) with screws ( 19 ) in generous screw holes ( 20 ) connected in horizontal and vertical position adjustable.

The tightness between the classifier head ( 4 ) and housing ( 2 ) is replaced by a ring-shaped, soft labyrinth component ( 24 ) reached. The support ring ( 25 ) has a double function, it reinforces the housing wall ( 26 ) and annularly takes the soft seal ( 27 ) on. The penetration depth through the sifter head ( 4 ) circumferential stiffening shelves ( 28 ) ensures a sufficient sealing effect with simultaneous height adjustment of the classifier head ( 4 ). Likewise, the housing wall penetrates ( 26 ) with sealing and balancing effect in the seal ( 29 ) and forms the labyrinth. The sifter can be sealed so dust-tight even without flange only by the weight of the sifter head.

Through the labyrinth component ( 27 ) in combination with the soft seals ( 27 . 29 ) and the design of the connection between the claws ( 11 . 12 ) of classifier head ( 4 ) and housing ( 2 ) a vibration decoupling between the two components is achieved.

3 shows the gap between the classifying wheel ( 6 ) and labyrinth ring ( 30 ) of the inner housing ( 3 ), which at the initial assembly by the horizontal adjustment possibility of the transition elements ( 11 . 12 ) can be radially aligned. For the axial alignment of the gap can be adjusted by means of the adjusting screws ( 21 ) the position of the rotating components of the classifier head to the gap surface of the inner housing ( 3 ), the adjustment is made via the gap adjustment between claw ( 11 ) and transition element ( 14 ) of the classifier head ( 5 ).

The adjustment is with resting sifter head ( 4 ) through holes ( 22 ) in the claws ( 12 ) of the housing possible. The gap ( 23 ) between the transition elements ( 13 . 14 ) can be used as a reference for the gap position.

The supporting frame ( 9 ) with the integrated top plate is designed as a welded construction in bending and plug-in technology. The location of the items during assembly is determined by a plug-in technique, are formed in the sheet metal part pin and pin receiving contours. A distortion-free and cost-reduced welded joint is thus possible.

The 4 shows how the Rie works amount of gear protection. On the sifter head are the drives ( 31 . 32 ) and the belt gears for driving the shafts of fan ( 5 ) and classifier wheel ( 6 ) arranged. The lateral area of the support frame forms the lateral belt transmission protection. The base plate ( 33 ) of the material inlet, the stiffening plates ( 34 . 35 ) and the motor plates ( 36 . 37 ) make up the upper belt transmission protection. The frontal belt gear protection is designed by the cover plates ( 38 . 39 ), with the engine plates ( 36 . 37 ) are connected.

The The invention is not on the above-described and in the drawing illustrated embodiment limited.

1

Convection wind sifter

2

Housing / external housing

3

inner housing

4

classifier head

5

fan

6

classifying wheel

7

material supply

8th

spreading plate

9

supporting frame

10

circular segments

11

claws of the classifier head

12

claws of the housing

13

Transition elements the housing

14

Transition elements of the classifier head

15

antivibration liner

16

pencils

17

screw

18

screw holes

19

screw

20

generous screw holes

21

adjustment

22

drilling

23

column

24

labyrinth component

25

support ring

26

housing wall

27

poetry

28

stiffening Borde

29

poetry

30

labyrinth ring

31

drive fan

32

drive classifier

33

baseplate material inlet

34

gusset

35

gusset

36

Motorplatte

37

Motorplatte

38

Cover plate

39

Cover plate

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 2204161 [0002]
• DE 19743491 A1 [0003]

Claims (11)

Recirculating wind sifter ( 1 ) consisting of: - outer housing ( 2 ) with fine material cone and fine discharge - inner housing ( 3 ) with coarse material cone and coarse material discharge and between them arranged Leitschaufelkranz - material supply ( 7 ) - fan ( 5 ) above the inner housing ( 3 ) - classifying wheel ( 6 ) and scattering plates ( 8th ) in the inner housing coaxial and below the fan ( 5 ) - drives and bearing units characterized in that - the sifter head ( 4 ) consisting of a support frame and a top plate - as well as fan ( 5 ) and indexing wheel ( 6 ) and their drives and bearings form a unit and - that the sifter head ( 4 ) and the housing ( 2 ) are decoupled vibration technology Recirculating wind sifter ( 1 ) according to claim 1, characterized in that the classifier head ( 4 ) and the housing ( 2 ) over claws ( 11 . 12 ) with transition elements ( 13 . 14 ) and vibration damping intermediate layer ( 15 ) are decoupled vibration technology Recirculating wind sifter ( 1 ) according to claim 1 or 2, characterized in that the vibration damping intermediate layer ( 15 ) consists of rubber Recirculating wind sifter ( 1 ) according to claim 1, characterized in that the vertical fixation of the classifier head ( 4 ) and housing ( 2 ) via the transition elements ( 13 . 14 ) he follows Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the horizontal fixation of the classifier head ( 4 ) and housing ( 2 ) via pins ( 16 ) he follows Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the classifier housing is designed self-supporting Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the classifier head ( 4 ) by its own weight on the housing ( 2 ) rests Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the classifier head ( 4 ) and housing ( 2 ) are sealed via a labyrinth component made of soft seal. Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the gap between the classifying wheel and the labyrinth ring ( 30 ) of the inner housing ( 3 ) via the transition elements ( 11 . 12 ) can be adjusted Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the support frame is designed as a U-profile Recirculating wind sifter ( 1 ) according to one or more of the preceding claims, characterized in that the supporting frame ( 9 ) together with the motor plates ( 36 . 37 ), the cover plates ( 38 . 39 ) and the base plate ( 33 ) represent the belt transmission protection.