EP3305423A1 - Expansion shaft screening machine with optimised transport performance - Google Patents

Abstract

A Spannwellensiebmaschine with a primary energized by means of a drive oscillating support frame (10) to which by means of elastic transmission elements swinging a swing frame is coupled, which is secondarily energized by the transmission elements of the support frame (10) and vibrated, wherein on the support frame (10) and on the oscillating axes cross member (11, 21) are arranged, wherein on one of the support frame (10) arranged cross member (11) in each case one arranged on the swing frame cross member (21) follows and between two cross members (11, 21) in each case a flexible screen covering (30) is arranged and on the cross beams (11, 21) releasably secured, wherein the vibration excitation of the swing frame via the transmission elements takes place in such a way, and wherein the vibration of the swing frame is linear or elliptical, wherein the main direction of the vibration of the swing frame at an angle between 0 ° and 90 ° r is the level of the swing frame, in particular at an angle greater than 0 ° and up to 90 °.

Description

The invention relates to a Spannwellensiebmaschine with a primary energized by means of a drive oscillating support frame to which by means of elastic transmission elements swinging a swing frame is coupled, which is secondarily energized by the transmission elements of the support frame and vibrated, wherein on the support frame and on the Oscillating frame cross member are arranged, wherein in each case one arranged on the support frame cross member follows a arranged on the swing frame cross member and between two cross members each arranged a flexible screen cover and is releasably secured to the cross members.

Such Spannwellensiebmaschinen are known. A disadvantage of the known Spannwellensiebmaschinen is that they must be employed to guarantee the transport of the material to be screened from the inlet side of the Spannwellensiebmaschine the drain side at a large angle to the horizontal and thereby have a considerable height.

The object of the invention is to overcome these disadvantages and to provide a Spannwellensiebmaschine, which provides improved transport of the screenings from the inlet side of the Spannwellensiebmaschine the drain side.

This object is achieved by a Spannwellensiebmaschine according to claim 1. Advantageous developments of the invention are specified in the subclaims.

Particularly advantageous in the Spannwellenslebmaschine with a primary energized by means of a drive oscillating support frame to which by means of elastic transmission elements free swinging a swing frame is coupled, which is secondarily energized by the transmission elements of the support frame and vibrated, wherein on the support frame and on the Oscillating frame cross member are arranged, with one arranged on the support frame cross member followed by a arranged on the swing frame cross member and between two cross members each arranged a flexible screen cover and is releasably secured to the cross members, it is that the vibration excitation of the swing frame on the transmission elements takes place that the vibration of the oscillating frame is linear or elliptical, wherein the main direction of the vibration of the oscillating frame is at an angle between 0 ° and 90 ° relative to the plane of the swing frame , in particular at an angle greater than 0 ° and up to 90 °.

Since the cross members are preferably arranged in a plane to which the screen coverings are respectively attached, the plane of the oscillating frame thus corresponds to the plane of the screen coverings.

In such Spannwellensiebmaschinen the support frame is caused to oscillate by means of a drive. On the support frame free swinging the swing frame is attached by means of elastic transmission elements. By transmitting the vibrations of the primary excited support frame via the transmission elements on the free-swinging swing frame also the swing frame is set in vibration. On the support frame and on the swing frame cross member are arranged, between which each Siebbeläge are attached. The cross member of the support frame and the cross member of the swing frame are each arranged alternately. By the relative movement of the swing frame relative to the support frame The screen coverings attached to the cross members, which each extend from one cross member to the next cross member, are stretched and compressed. As a result, the screenings applied to the Siebbeläge is greatly accelerated.

The support frame thus forms the first system which is primarily externally excited by means of a drive, and the swing frame forms the second system, which is mounted freely swinging on the first system. The movement of the second system is thus a consequence of the movement of the first system, since the swing frame forming the second system is cantilevered on the support frame forming the first system. The coupling of the swing frame to the support frame by means of elastic transmission elements, by means of which the swing frame is attached to the support frame and coupled to the support frame. The swing frame is thus vibrationally excited by the support frame via the transmission elements.

With the main direction of vibration of the vibrating frame, in the case of a linear vibration, the direction of this linear vibration is designated. In the case that the movement of the swing frame follows an ellipse, the main direction of the swing is the direction of the connection line of the foci of the ellipse. This means that the employment of the ellipse corresponds to the employment of the connecting line between the focal points of the ellipse.

The fact that the main direction of the vibration of the swing frame is at an angle between 0 "and 90 ° relative to the plane of the swing frame, in particular at an angle greater than 0 ° and up to 90 °, the further transport of the reprocessed material to be screened on the screen coverings is improved Thus, the transport of the material to be screened in the transport direction, ie from the inlet side of the Spannwellensiebmaschine be guaranteed to the drain side even at smaller Maschinenanstellwinkeln to the horizontal, whereby the height of the Spannwellensiebmaschine can be reduced.

With the transport direction of the Spannwellensiebmaschine the direction of movement of the reprocessed material to be screened on the Spannwellensiebmaschine of the inlet side in the direction of the expiry of the Spannwellensiebmaschine is meant. The screenings to be processed are supplied on the inlet side of the tensioning shaft screening machine and discharged on the top of the Siebbeläge on the discharge side of the Spannwellensiebmaschine after further transport. For this purpose, the Spannwellensiebmaschine is positioned such that at least the swing frame of the Spannwellensiebmaschine from inlet to drain has a gradient. The vibration excitation of the oscillating frame according to the invention with an adjustment of the main direction of the vibration of the swing frame at an angle relative to the plane of the swing frame, the transport performance is improved even at lower angles of attack of the swing frame relative to the horizontal.

Preferably, the swing frame is inclined relative to the horizontal, in particular at an angle of up to 30 °, in particular up to 15 °. Due to the inclination of the oscillating frame relative to the horizontal transport performance of the Spannwellensiebmaschine is improved in the transport direction.

Preferably, the primary excitation of the support frame by means of an imbalance shaft, wherein the shaft axis of the imbalance shaft is located in the center of gravity or above the center of gravity or below the center of gravity of the support frame. Alternatively, the primary excitation of the support frame can be effected by means of two synchronized unbalanced shafts, wherein the synchronization of the two unbalanced shafts takes place mechanically, in particular by means of a transmission, and / or electronically. The centers of gravity of the imbalance shafts may be both or one of both above or below the center of gravity of the support frame. Due to the center of gravity of the imbalance shaft / s relative to the support frame, the resulting oscillatory motion of the support frame due to the primary excitation can be influenced, which is reflected accordingly in the resulting oscillatory movement of the swing frame.

In a preferred embodiment, the primary excitation of the support frame by means of two synchronized unbalanced shafts, wherein the connecting line between the unbalanced shafts is at an angle relative to the plane of the support frame. By adjusting the line of connection between the imbalance shafts at an angle to the plane of the support frame, the position and orientation of the ellipse of the vibration of the support frame can be influenced. By the elastic coupling of the swing frame to the support frame via the elastic transmission elements, in turn, the resulting oscillatory motion of the support frame is influenced.

The primary excitation of the support frame can be done by a forced excitation, in particular by means of an eccentric. Alternatively or cumulatively, the primary excitation of the support frame can be effected by means of an exciter with one or two or more waves, in particular by means of a double unbalance transmission.

The primary excitation of the support frame may be linear or circular or elliptical.

Preferably, the transmission elements are formed by leaf springs and / or leaf spring packets, in particular, the leaf springs may be at an angle relative to the plane of the swing frame. In particular, the leaf springs can be at an angle of 90 ° to 45 °, in particular up to 15 ° or up to 0 ° relative to the plane of the swing frame. By adjusting the leaf springs or the leaf spring assemblies at an angle greater than 0 ° and in particular up to 45 ° or up to 90 ° relative to the plane of the swing frame, the desired swinging motion of the swing frame due to the primary excitation of the support frame can be brought about. In particular, by an adjustment of the leaf springs or the leaf spring assemblies at an angle relative to the plane of the swing frame, the acceleration of the material to be screened perpendicular to the plane of Schwingrahmens be increased. As a result, the performance of the Spannwellensiebmaschine can be further increased.

In a preferred embodiment, the transmission elements are formed by leaf springs and / or leaf spring packets whose free length between the support frame and the oscillating frame is variable. The leaf springs and / or leaf spring assemblies can be clamped in corresponding receptacles on the support frame and the swing frame, which is made possible by loosening the screws an adjustment of the free length of the leaf springs and / or leaf spring assemblies between the support frame and the swing frame. This allows an individual and coordinated adjustment of the spring rate and thus the transmission behavior of the leaf springs and / or leaf spring assemblies are made. By the tuned adjustment of the spring rate and thus the transmission behavior, in turn, the resulting oscillatory movement of the swing frame due to the excitation by the support frame via the transmission elements can be influenced and set in the desired manner.

Preferably, the transmission elements are formed by leaf spring packets, wherein the number of leaf springs used in each leaf spring package is variable. As a result of the variation of the number of leaf springs used in each leaf spring packet, the spring rate and thus the transmission behavior of the transmission elements can also be defined alternatively or cumulatively to the variation of the free length.

Figur 1

eine schematische Darstellung der Seitenansicht einer Spannwellensiebmaschine mit der Bewegung der Querträger am Schwingrahmen;

Figur 2

ein Ausführungsbeispiel der Anregung der Querträger am Schwingrahmen;

Figur 3

die Bewegungen des Schwingrahmens und des Tragrahmens;

Figur 4

einen Querträger im Schnitt mit daran befestigten Siebbelägen in einer ersten Ausführungsform;

Figur 5

einen Querträger im Schnitt mit daran befestigten Siebbelägen in einer zweiten Ausführungsform

Several embodiments of the invention are illustrated in the figures and are explained below. Show it:

FIG. 1

a schematic representation of the side view of a Spannwellensiebmaschine with the movement of the cross member on the swing frame;

FIG. 2

an embodiment of the excitation of the cross member on the swing frame;

FIG. 3

the movements of the swing frame and the support frame;

FIG. 4

a cross member in section with attached Siebbelägen in a first embodiment;

FIG. 5

a cross member in section with attached Siebbelägen in a second embodiment

In the figures, identical components and assemblies are provided with identical reference numerals. The representations of the FIGS. 1 and 2 are purely schematic. FIG. 1 schematically shows the side view of a Spannwellensiebmaschine with the support frame 10, which forms the system I The system I is primary excitation means of a drive. The swing frame 20 thus forms the system II. By the suspension of the swing frame 20 on elastic transmission elements of the swing frame 20 relative to the support frame 10 swing freely and thus perform relative movements relative to the support frame 10 ,

Attached to the support frame 10 are a number of first cross members 11. The oscillating frame 20 is mounted on the support frame 10 cantilevered between the first cross members 11 of the support frame 10, the cross member 21 of the swing frame 20. There are thus alternately first cross member 11 of the support frame 10 and second cross member 21 of the swing frame 20 in the Spannwellensiebmaschine arranged. Between the cross members 11, 21 screen coverings 30 are arranged, which are each secured to the cross members. The attachment of the Siebbeläge 30 to the cross members is based on the embodiments according to the FIGS. 4 and 5 explained below.

In FIG. 1 by the double file 40, the relative movement of the swing frame 20 relative to the support frame 10 is shown. By doing Embodiment according to FIG. 1 it is a linear movement of the swing frame 20 relative to the support frame 10th

FIG. 2 shows an embodiment of the excitation of the movement of the system II with the swing frame 20 and the attached cross members 21 in a schematic manner. For this purpose, the swing frame 20 as shown in the schematic representation FIG. 2 shown suspended from the support frame 10 free-swinging. The suspension of the swing frame 20 by means of elastic transmission elements free-swinging on the support frame 10. In the schematic representation according to FIG. 2 Again, it is a linear movement of the swing frame 20 relative to the support frame 10th

FIG. 3 shows a further embodiment of a Spannwellensiebmaschine. Here, the Spannwellensiebmaschine with support frame 10 and the swinging freely swinging swing frame is employed at an angle to the horizontal. The support frame 10 forms the system I. The in the side view according to the FIG. 3 Concealed swing frame forms the system II. This employment of the support frame 10 and the swing frame at an angle relative to the horizontal serves to transport the screenings from the inlet 25 to the outlet 26. The transport direction of the screenings on the Siebbelägen 30 along the swing frame from the inlet 25 to the drain 26th is indicated by the arrow 27. The Spannwellensiebmaschine is supported by means of coil springs 35 on foundations 1.

The system I is formed by the support frame 10. The support frame 10 is primary excited, so that the fixed to the support frame cross member 11 to move according to the ellipse 12. The primary excitation of the support frame 10 by means of two unbalanced shafts, wherein the two unbalanced shafts have different focal points. Due to the relative positioning of the centers of gravity of the two imbalance shafts to each other, the inclination of the ellipse 12 is selected relative to the horizontal.

The system II, which is formed by the swing frame is freely swinging coupled by means of the transmission elements to the system I in the form of the support frame 10. Due to the vibration of the support frame 10, as represented by the ellipses 12, the vibrating frame is vibrated, which are represented by the ellipses 22. This means that the cross members 21, which are arranged on the swing frame, perform a movement corresponding to the ellipses 22. As a result of this different movement of the oscillating frame relative to the support frame 10, the screen coverings 30 are stretched and compressed, as a result of which the screenings applied to the screen coverings 30 are greatly accelerated and thereby processed. The transport of the material to be screened takes place in the direction of the transport direction 27 from the inlet 25 to the outlet 26 of the tension wave screening machine. As FIG. 3 can be seen, the main direction of movement of the ellipses 22 is employed at an angle relative to the transport direction 27. With the main direction of movement of the ellipses 22 while the connecting line between the focal points of the Bewegungsellipse 22 is designated.

By adjusting the main direction of the ellipse 22 with respect to the transport direction 27 at an angle, the acceleration of the screened material on the screen coverings 30 is extremely increased. In this way, the transport performance of the material to be screened in the transport direction 27 can be increased, so that the angle of attack of the swing frame relative to the horizontal can be reduced compared to conventional screening machines. By this reduction of the angle of attack relative to the horizontal, the height of the Spannwellensiebmaschine is reduced.

Two Ausführungsbespiele the attachment of Siebbeläge 30 to the cross members 11, 21 are in the FIGS. 4 and 5 and are explained below.

FIG. 4 shows a first embodiment of the Siebbelagbefestigung on a cross member 11 Each two adjacent Siebbeläge 31, 32 abut each other at the front, wherein the Siebbeläge 31, 32 have an excess, so that a Contact area 33 is formed, in which the two screen coverings 31, 32 abut each other elastically deformed against each other. By this elastic deformation of the end faces of the screen coverings 31, 32, the gap 34 is sealed to the top. By this sealing of the gap 34, it is ensured that no lying on top of the screenings can penetrate into the gap between the two screening mats 31, 32.

The screen coverings 31, 32 each have an undercut 36, 37. By means of these undercuts 36, 37 of the cross member 11 is engaged behind by the Siebbelägen 31, 32. As in FIG. 4 can be seen, the mutually abutting Siebbeläge 31, 32 mutually inhibit each other in the installation situation and thus mutually secure against accidental slipping out of the trapped in the cross beams 11 Siebbelägen 31, 32nd

The cross member 11 is formed for example by an open U-shaped profile and has inwardly directed undercuts, each of the two undercuts of the cross member 11, each with an undercut 36, 37 of the two Siebbeläge 31, 32 cooperates and forms a positive connection.

As a result of the fact that the screen coverings have a projection on the face side in a height range of 50% in the exemplary embodiment shown, which causes the screen coverings 31, 32 to elastically deform one another in the contact region 33, the gap 34 is sealed toward the top side. At the same time the screen coverings are clamped by the elastic deformation in the section 33 against each other and thus both positively and non-positively in the gap of the cross member 11 and clamped clamped.

FIG. 5 shows the section of another embodiment of the Siebbelagbefestigung on the cross member 11. Again, both opposite Siebbeläge 41, 42 each have an undercut, which is a positive connection with the cross member 11 for attachment of the two Siebbeläge 41, 42 forms. Furthermore, the screen coverings abut one another in a region 43 in such a way that they are elastically deformed against each other and inhibit each other.

The cross member 11 is formed by an open U-shaped profile and has inwardly directed undercuts, each of the two undercuts of the cross member 11 cooperates with an undercut of the two Siebbeläge 31, 32 and forms a positive connection.

The transport direction in FIG. 5 corresponds to the direction in the image plane from left to right. The first Siebbalage 41 in the transport direction has a projection 44, which projects beyond the adjacent Siebbelag 42 in the transport direction and thereby forms the direction of transport from left to right downward step 45. As a result, the screenings are broken at the edge of the stage and the removal improved.

The cross member of the support frame and the cross member of the swing frame are each arranged alternately successively in the transport direction one behind the other. Due to the relative movement of the oscillating frame relative to the support frame, the screen coverings are alternately stretched and compressed and thereby accelerates the screenings to be processed.

Claims (11)

Spannwellensiebmaschine with a primary energized by means of a drive oscillating support frame (10), to which by means of elastic transmission elements free swinging a swing frame (20) is coupled, which is secondarily energized by the transmission elements of the support frame (10) and vibrated, wherein the support frame (10) and on the swing frame (20) cross members (11, 21) are arranged, wherein on one of the support frame (10) arranged cross member (11) in each case one on the swing frame (20) arranged cross member (21) follows and a flexible screen covering (30, 31, 32) is arranged between two cross members (11, 21) and is detachably fastened to the cross members (11, 21), characterized in that the oscillation excitation of the oscillating frame (20) takes place via the transmission elements, in that the oscillation of the oscillating frame (20) is linear or elliptical, the main direction of the oscillation of the oscillating frame (20) being is at an angle between 0 ° and 90 ° relative to the plane of the swing frame (20), in particular at an angle greater than 0 ° and up to 90 °. Spannwellensiebmaschine according to claim 1, characterized in that the primary excitation of the support frame (10) takes place by means of an imbalance shaft, wherein the shaft axis of the imbalance shaft in the center of gravity or above the center of gravity or below the center of gravity of the support frame (10). Spannwellensiebmaschine according to claim 1, characterized in that the primary excitation of the support frame (10) takes place by means of two synchronized unbalanced shafts, wherein the synchronization mechanically, in particular by means of a transmission, and / or electronically. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the oscillating frame (20) is inclined relative to the horizontal, in particular at an angle of up to 30 °. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the primary excitation of the support frame (10) takes place by means of two synchronized unbalanced shafts, wherein the connecting line between the unbalanced shafts at an angle relative to the plane of the support frame (10). Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the primary excitation of the support frame (10) takes place by a forced excitation, in particular by means of an eccentric. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the primary excitation of the support frame (10) by means of an exciter with one or two or more waves, in particular by means of a Doppelunwuchtgetriebes. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the primary excitation of the support frame (10) is linear or circular or elliptical. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the transmission elements are formed by leaf springs and / or leaf spring assemblies, in particular that the leaf springs at an angle relative to the plane of the swing frame (20) stand, in particular at an angle of 90 ° to 45 °, in particular up to 15 °. Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the transmission elements are formed by leaf springs and / or leaf spring assemblies whose free length between the support frame (10) and the oscillating frame (20) is variable Spannwellensiebmaschine according to any one of the preceding claims, characterized in that the transmission elements are formed by leaf spring packets, wherein the number of leaf springs used in each leaf spring package is variable

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