EP1989022B1 - Spinner gate housing - Google Patents

Abstract

The invention relates to a spinner gate housing (100) comprising an outer housing (10) consisting of at least one covering element (15), at least one bottom element (16), two front wall elements (11, 12) and two trapezoidal lateral wall elements (13, 14) which are arranged at a distance from each other and encompassed b said front wall elements. At least one of the lateral wall elements (13, 14) comprises a recess for receiving a guiding sleeve. A guiding sleeve cover (40) is pressed against the lateral wall element (14) by means of at least three claw devices (50) fixed to the lateral wall element next to the recess for receiving the guiding sleeve and/or the bottom element (16) is connected to a base baring element (17) by means of a plurality of claw devices (70), said base bearing element to be fixed to a blasting compartment or a foundation.

Description

The invention relates to a blast wheel housing with an outer housing, which consists of at least one cover element, two side elements and two of these comprises spaced apart arranged end wall elements, and with at least one insertable into the outer housing lining insert, the at least one lining cover element, two lining side elements and two of this comprises, spaced apart lining end wall elements comprises.

For surface treatment of workpieces, centrifugal wheels are used, with the aid of which fine-grained blasting medium can be thrown onto the workpiece surface at high speed. The spinner wheels essentially consist of at least one side plate with attached throwing blades which extend substantially radially. The blast wheel is arranged in a blast wheel housing and rotatably mounted there. The blast wheel housing has only in a partial area on the outer circumference of the blast wheel an opening from which the blasting agent can escape.

The remaining areas of the outer housing are closed and provided with lining elements, over which a protection of the actual outer housing against the abrasive abrasive particles is given. The lining elements are designed as wearing parts and therefore must be easy to insert into the outer housing or to be removed again therefrom.

In order to be able to direct the blasting agent through the opening, it is applied via a guide sleeve, which is arranged fixed in the center of the rotating blast wheel. The guide sleeve with the subsequent blasting agent supply is attached to a Leithülsendeckel, which in turn is attached to a recess on a side wall member of the outer housing. Due to the flange-like connection of outer housing and Leithülsendeckel different angular positions are set. The jet turbine is fastened to a blast cabin via a screw connection with a foundation or the base element. The screws pass through holes in the foot elements of the outer housing.

With all threaded connections which engage in threaded bores, it is problematic that the blasting agent itself or the abrasion resulting in the blasting process, which is partly in the form of dust, can penetrate into the screw connections and block them. This may mean that in the repair or maintenance case, the screw must be completely destroyed, for example, to remove the jet turbine or dismantle a Leithülsendeckel. This is usually accompanied by a substantial damage to the machine part, in which the threaded hole is introduced.

The object of the invention is therefore to enable removal of the screw connections even when the screw connection is blocked by contamination, without damaging the blower wheel housing with its attachments.

This object is achieved by a blast wheel with the features of claim 1.

Through the attachment via clamping claws, which are fastened with screw and nut, tapped holes are avoided in the outer housing together with the inventive arrangement of the screw heads. The necessary power flow is conducted past the edges of the component to be fastened. If it comes to blocking the threaded connection, z. B. in the preferred arrangement of the end portion of the screw with the nut freely accessible outside of the machine housing. This can be separated relatively easily, for example with a power cutter, whereby the connection is released without the machine housing is damaged. The lower part of the severed screw is exposed in the T-slot and can be easily removed from there. By inserting a new screw, the connection can be restored immediately. It is by no means necessary to rework or weld and rebuild threaded holes at the attachment points.

Due to the arrangement with the screw head facing the outer housing, the overall height can be reduced, since within the T-slot only the mostly hexagonal or otherwise provided with key surfaces part of the screw head needs to be added. Unless the Height is not an important criterion, the mother may be concealed and show the screw head to the outside in reverse order.

Preferably, the T-groove is about as wide as the key width, so that the screw head or the mother used there is guided against rotation.

In particular, as an assembly aid, an embodiment is advantageous in which in the groove bottom of the T-groove a recess is made, which ends in front of the open end of the T-groove. Thus, it is possible to initially tighten the fittings only slightly by hand during assembly. Nevertheless, it is prevented by the seated in the recessed portion of the T-nut screw head that the Spannpratzenvorrichtung slipped out of the T-slot, especially for vertically mounted parts. The same applies to the operation: should loosen the screw during operation, then mother and screw would have to be so far away from each other that an axial clearance of a few millimeters is given. Only then could the Spannpratzenvorrichtung slip out of the T-slot.

• Die Spannpratzen sind als Klemmelement ausgebildet und haben wenigstens an einem Ende eine winklig überstehende Kante. Das Klemmelement ist am Spannpratzenlagerelement oder am Basiselement drehbar gelagert. Dabei wird der Drehpunkt durch eine Schraube bestimmt, die vorzugsweise mit ihrem Kopf in die T-Nut am Spannpratzenlagerelement oder am Basiselement eingeschoben ist.

Preferred in this form of Spannpratzenvorrichtung is the following development:

• The clamping claws are designed as clamping element and have at least at one end an angularly projecting edge. The clamping element is rotatably mounted on the Spannspatzenlagerelement or on the base member. In this case, the pivot point is determined by a screw, which is preferably inserted with its head in the T-groove on Spannspatzenlagerelement or on the base member.

If the screw and thus the fulcrum between clamping claw and Spannspatzenlagerelement at the intended screwing in the T-groove, it would - should the pre-tension of the screw subside - which blocks a protruding edge on the Spannpratzenvorrichtung upon rotation form fit to the body of Spannspatzenlagerelements. At the same time, the head of the screw is fixed due to the depression in the groove bottom in the region of the intended Verschraubungspunkts. The screw together with the clamping element could only slip out of the T-slot if the screwed connection has rotated so far that the screw head can come out of the recess in the groove, ie there is a great axial play on the screw connection. If a self-locking nut is used, the risk of such loosening of the screw connection and thus the risk that the clamping element can slip out is largely minimized.

If the screw and thus the pivot point lies at the front in the T-slot, the clamping element can be rotated freely. The angled protruding edge of the clamping element can pass the Spannspatzenlagerelement over to allow easy disassembly of the component.

If the bias of the screw decreases and the screw together with the clamping element make a movement to the open end of the T-slot, the edge would strike before the Spannspatzenlagerelement and prevent the further sliding out of the screw. Only if the connection would be loosened so far that the edge could slide over the Spannspatzenlagerelement above, would - as already explained above - a complete slipping the Spannpratzenvorrichtung possible. This already enough tightening the screw by hand to secure the Spannpratzenvorrichtung during assembly.

A further embodiment provides that a lining insert can be used as wear protection in the outer housing, which consists of at least two trapezoidal lining side elements and two lining end wall elements, wherein a lining cover element can be locked on the lining insert by means of two clamping claws which are fastened to a clamping tongue support element on the outer housing. Also in the lining cover fastening within the outer housing, the connection formation according to the invention is advantageous.

The attachment of the Spannpratzenlagerelements for the lining cover can be simplified in that this has a projection, shoulder or extension, which is inserted into a compatible recess in the outer outer housing. This connection can be realized as a press fit or secured by means of a welding point.

If the Leithülsendeckel must be attached to the side wall member, it is appropriate that at least three Spannspatzenlagerelemente are mounted on the side wall member of the outer housing to the Leithülsenaufnahmeausnehmung in each of which a T-slot is introduced. Its open end is preferably disposed away from the sliding sleeve receiving recess so that the T-slots extend radially outward with respect to the center of the conductive sleeve cover.

The foot elements are preferably two spaced parallel and mirror-symmetrical aligned foot angle. These are easy to produce, for example by folding the side wall elements, and can be clamped well on the clamps.

Fig. 1

ein Schleuderradgehäuse 100 mit eingesetzter Turbine 200 in einer teilweise geschnittenen, perspektivischen Ansicht,

Fig. 2a-2d

eine Spannpratzenvorrichtung in Draufsicht in verschiedenen Stellungen,

Fig. 3

eine Spannpratzenvorrichtung am Fußwinkel im Schnitt;

Fig. 4, 5

eine Spannpratzenvorrichtung am Auskleidungsdeckelelement in Draufsicht und im Schnitt;

Fig. 6

eine weitere Ausführungsform einer Spannprat-zenvorrichtung am Auskleidungsdeckelelement in Draufsicht;

Fig. 7

einen Auskleidungseinsatz in perspektivischer Ansicht,

Fig. 8

eine Detailansicht des Schleuderradgehäuses aus Fig. 1,

Fig. 9a

eine Detailansicht einer ersten Verbindung von Auskleidungselementen an dem Schleuderradgehäuse aus Fig. 1; und

Fig. 9b

eine Detailansicht einer zweiten Verbindung von Auskleidungselementen.

The invention will be explained in more detail with reference to the drawing. The figures show in detail:

Fig. 1

a blast wheel housing 100 with inserted turbine 200 in a partially cut, perspective view,

Fig. 2a-2d

a Spannpratzenvorrichtung in plan view in different positions,

Fig. 3

a Spannpratzenvorrichtung at the foot angle in section;

Fig. 4, 5

a Spannpratzenvorrichtung the lining cover element in plan view and in section;

Fig. 6

a further embodiment of a Spannprat zenvorrichtung on the lining cover element in plan view;

Fig. 7

a lining insert in perspective view,

Fig. 8

a detailed view of the blower from Fig. 1 .

Fig. 9a

a detailed view of a first connection of lining elements on the blower from Fig. 1 ; and

Fig. 9b

a detailed view of a second connection of lining elements.

Fig. 1 1 shows a blast wheel housing 100 with a turbine 200 installed therein. The turbine 200 is essentially composed of a motor 201, a blast wheel 202 with throwing blades 203, and an impeller 204. The blast wheel housing 100 is formed by an outer housing 10 and a liner insert 20.

The outer housing 10 encloses the impeller 202, 203, 204 except for the bottom area open at the bottom. It is formed inter alia of trapezoidal side wall elements 14, which are arranged at a distance from each other, in particular are aligned parallel to each other. Sideways here side wall elements 11, 12 are attached. Above a lid member 15 is placed.

The side member 11 in Fig. 1 extends from a rear, planar area 1.1.4 on a first, at right angles employed leg 11.3, which is again bent so that there is another short leg 11.2, the outer edge 11.1 is connected either to the lateral outer edge of the end wall element 14 or welded directly onto the surface of the end wall element 14.

On the outside, on a receptacle in the side member 12 of the outer housing 10, an adjusting screw 12.2 is arranged, with which the lining side member 22 is pressed onto the lining end elements 23, 24. A screw connection 12.1 connects the flange-like bent upper edge of the side edge element 12 with a cover element 15.

In the right area in Fig. 1 is the outer housing 10 is cut open and allows the view of the liner insert 20, which is formed here of flat steel plates.

• eines Leithülsendeckels 40 auf dem Seitenwandelement 14,
• eines Auskleidungsdeckelelements 25 auf dem Auskleidungseinsatz 20 und/oder
• des ganzen Schleuderradgehäuses 100 mit seinen Fußwinkeln 16 auf einem Basislagerelement 17

For fixing

• a Leithülsendeckels 40 on the side wall element 14,
• a liner cover member 25 on the liner insert 20 and / or
• of the entire blast wheel housing 100 with its foot angles 16 on a base bearing element 17th

Spannpratzenvorrichtungen 50, 60, 70 are used.

• Der Fußwinkel 16 ist vom Seitenwandelement 14 abgekantet und liegt auf einem Basiselement 17 auf. In dieses ist eine T-Nut eingebracht, deren oberer Teil 17.1 eine Weite besitzt, die das seitliche Einschieben eines Schaftes einer Schraube 76 ermöglicht. Die Weite eines unteren Teils 17.2 entspricht etwa der Schlüsselweite des Schraubenkopfes, so dass dieser verdrehsicher in der Nut geführt ist. Ein Klemmelementelement 71 der Spannpratzenvorrichtung 70 überbrückt mit seiner Breite die Nut 17.1 und liegt mit einer hinteren, überstehenden Kante 71.1 beidseits der Nut 1.7.1 auf dem Basiselement 17 auf. Die Schraube 76 läuft durch das Klemmelement 71 hindurch und ist oben mit einer Hutmutter 77 versehen. Durch Anziehen der Verschraubung drückt das Klemmelement auf den Fußwinkel 16 und klemmt diesen am Basiselement 17 fest.

The construction of the Spannpratzenvorrichtungen is first using the example of Spannpratzenvorrichtung 70 for explains the attachment of the foot angle 16 with reference to Figure 3:

• The foot angle 16 is bent from the side wall member 14 and rests on a base member 17. In this, a T-slot is introduced, the upper part 17.1 has a width which allows the lateral insertion of a shaft of a screw 76. The width of a lower part 17.2 corresponds approximately to the wrench size of the screw head, so that it is guided against rotation in the groove. A clamping element element 71 of the clamping claw device 70 bridges the groove 17.1 with its width and rests with a rear, protruding edge 71.1 on both sides of the groove 1.7.1 on the base element 17. The screw 76 passes through the clamping element 71 and is provided at the top with a cap nut 77. By tightening the screw presses the clamping element on the foot angle 16 and clamps it firmly to the base member 17.

• Fig. 2a zeigt eine Ausgangsstellung, in der ein Klemmelement 51 mit seiner nach unten abstehenden Kante 51.1 parallel zu einem Spannpratzenlagerelement 52 ausgerichtet ist, welches eine Nut 52.1 aufweist, in der eine Schraube 56 positioniert ist. Liegt die Schraube 56 vorne in der Nut 52.1, kann das Klemmelement 51 gegenüber dem Spannpratzenlagerelement 52 verdreht werden.
• Fig. 2b zeigt, wie beim Drehen die Kante 51.1 an einer Ecke 53 des Spannpratzenlagerelements 52 vorbeiläuft, wenn die Schraube ganz vorn in der Nut positioniert ist.
• In Fig. 2c hingegen ist der Drehpunkt dadurch verschoben, dass die Schraube 56 eine andere Position innerhalb der Nut 52.1 hat. Die Kante 51.1 läuft nun bei kleinen Drehwinkeln gegen die Ecke 53 und wird dort blockiert.
• Fig. 2d schließlich zeigt eine Stellung, in der die Schraube 56 innerhalb der Nut 52.1 so weit zurück gezogen ist, dass die Kante 51.1 vorn am Spannpratzenlagerelement 52 anliegt. In dieser Stellung ist ein Formschluss durch die voreinander liegenden Flächen gegeben und keine Verdrehung mehr möglich.

The FIGS. 2a to 2c show the example of Spannpratzenvorrichtung 50 for the Leithülsendeckel a rotation:

• Fig. 2a shows a starting position in which a clamping member 51 is aligned with its downwardly projecting edge 51.1 parallel to a Spannspatzenlagerelement 52 having a groove 52.1, in which a screw 56 is positioned. If the screw 56 is located in the front in the groove 52.1, the clamping element 51 can be rotated relative to the Spannspatzenlagerelement 52.
• Fig. 2b shows how, when turning, the edge 51.1 passes by a corner 53 of the clamp support bearing element 52, when the screw is positioned at the very front of the groove.
• In Fig. 2c however, the pivot point is shifted by the screw 56 having a different position within the groove 52.1. The edge 51.1 now runs at small angles of rotation against the corner 53 and is blocked there.
• Fig. 2d Finally, shows a position in which the screw 56 is pulled back within the groove 52.1 so far that the edge 51.1 rests against the front Spannspatzenlagerelement 52. In this position, a positive connection is given by the surfaces lying in front of each other and no more rotation possible.

Fig. 4 shows a section of the liner cover member 25 of the liner insert 20, which is disposed within the outer housing 10. From the outer housing 10 are in Fig. 4 the front and side walls 12, 14 and the foot angle 16 visible. The liner cover member 25 includes a rim side. Eintiefung 25.1, in which a clamping element 61 of a clamping jaw device 60 positively engages and is fixed against rotation. The clamping element 61 is mounted on a Spannspatzenlagerelement 62, which is pressed with a projection 62.1 in a compatible recess in the end wall 12. The connection is made via a screw 66.

In Fig. 5 the entire Spannpratzenvorrichtung 60 for the lining cover member 25 is shown in section.

Fig. 6 shows a modification of the previously using the FIGS. 4 and 5 described embodiment, wherein in a Clamping device 60 'shown here no recess in the lid 25 is no longer present, but an anti-rotation is achieved in that a clamping element 61' is supported with its back directly to the inside of the side wall member 12.

Fig. 7 shows the separate lining insert 20, which is formed in the illustrated embodiment completely from flat plates 21 ... 25. A liner end wall member 14 and liner sidewall members 21, 22 engage their upper edges in corresponding grooves in the liner cover member 25. The plate-shaped elements 21, 22, 25 are connected to each other via clamping means, which are attached to the side facing away from the blower outside, so that there is no risk that the abrasive penetrates into threaded holes of the tension and blocks them. The end wall elements 23, 24 have large recesses to introduce or store the turbine with blast wheel.

Fig. 8 shows a detail of the blower wheel housing at the transition from the lid to the side. Here is the cover of the outer housing removed. The end wall 14 is fixedly connected to the end wall lining element 24 via a screw connection 14.6. At the top, the end wall 14 is closed by a flange 14.5. The end wall lining element 24 has at its lateral edge positioning cams 24.1, one of which in Fig. 3 is shown. On the opposite side, on the lining side member 22, a correspondingly compatible Nockenaufnahmeausnehmung 22.1 is formed. It is possible both an irregular arrangement of the positioning cam, for example, also right and left side wall elements 22, 23 to identify unmistakable, as well as a symmetrical arrangement to obtain identical side wall elements 22, 23, so that only a single spare part is required for the side wall elements as a wearing part.

Fig. 9a shows the connection of the lining elements 22, 24, 25 in a detailed view. Here it can be seen in particular that in the cover element 25 grooves are introduced into which the elements 22, 24 are inserted.

In Fig. 9b is shown a slightly modified way of connection. Here, the side wall elements 22 'and the end wall element 24' are provided with a stepped stepped edge. Accordingly compatible with the outer edges of the lid member 25 'are designed. The Stuferifalz training this connection results in a space-saving impact without overhang of the cover member at a triple deflection in the joint gap and a correspondingly good sealing effect against penetrating blasting.

Claims (12)

1. Spinner gate housing (100) having an outer housing (10) which consists of at least one cover element (15), at least one foot element (16), two end wall elements (11, 12) and of two trapezoidal, mutually spaced-apart side wall elements (13, 14) which are enclosed by these end wall elements, wherein at least one of the side wall elements (13, 14) comprises a recess for receiving a guiding sleeve, having at least one lining insert (20, 30) which can be inserted into the outer housing (10) and includes at least one lining cover element (25), two lining side elements (21, 22) and two mutually spaced-apart lining end wall elements (23, 24) which are enclosed by these lining side elements,
   characterised in that

   - a guiding sleeve cover (40) is pressed onto the side wall element (14) via at least three clamping claw devices (50) attached to the side wall element adjacent to the recess for receiving the guiding sleeve, and/or

   - the foot element (16) is connected to a base bearing element (17) via several clamping claw devices (70), which base bearing element is attached to a blasting cubicle or to a foundation,

   wherein the clamping claw devices (50, 70) are each attached to a nut (77) by means of a bolt (56, 76) which is inserted with its bolt head into a T-groove (17.1, 17.2, 52.1), which is open on at least one side, on the side wall element (14) or on the guiding sleeve cover (40) and/or on the foot element (16) or on the base element (17).
2. Spinner gate housing (100) as claimed in Claim 1, characterised in that the bolt head and/or the nut are provided with spanner flats, wherein the width across flats substantially corresponds to the width of a wide part (17.2) of the T-groove.
3. Spinner gate housing (100) as claimed in Claim 1 or 2, characterised in that a depression (17.3) is incorporated in the base of the T-groove (17.1, 17.2) and terminates prior to the open end of the T-groove.
4. Spinner gate housing (100) as claimed in any one of Claims 1 to 3, characterised in that the lining cover element (25) can be locked to the lining insert (20) via a clamping claw device (61, 61') which is attached to a clamping claw bearing element (62) on the outer housing (10).
5. Spinner gate housing (100) as claimed in Claim 4, characterised in that the lining cover element (25) comprises, at least on two opposite outer edges, a recess (25.1) for a clamping element (61) of a clamping claw device (60) engaging therein.
6. Spinner gate housing (100) as claimed in any one of Claims 1 to 5, characterised in that the clamping claw bearing element (62) comprises a protrusion (62.1) which engages into a compatible recess in the end wall element (12) of the housing (10).
7. Spinner gate housing (100) as claimed in any one of Claims 1 to 6, characterised in that the clamping claw devices (50, 70) each include at least one clamping element (51, 71) which on the end side comprises at least one angularly protruding edge (51.1, 71.1) and is mounted on the clamping claw bearing element (52, 62) or on the base element (17) such that each edge (51.1, 71.1) of the clamping element (51, 71) goes past the clamping claw bearing element upon rotation about a point of rotation determined by the end position of the bolt in the T-groove (17.1, 17.2, 52.1), and that at least one edge (51.1, 71.1) is blocked by the clamping claw bearing element (52) in a positive-locking manner upon rotation about a point of rotation remote therefrom in the end region of the T-groove.
8. Spinner gate housing (100) as claimed in any one of the preceding Claims, characterised in that at least three clamping claw bearing elements (52) are mounted on the side wall element (14) of the housing (10) about the recess for receiving the guiding sleeve and a T-groove (52.1) is incorporated in each clamping claw bearing element.
9. Spinner gate housing (100) as claimed in Claim 8, characterised in that the open end of the T-groove (52.1) is disposed remote from the recess for receiving the guiding sleeve in each case.
10. Spinner gate housing (100) as claimed in Claim 9, characterised in that the T-grooves (52.1) extend outwards radially with respect to the centre of the guiding sleeve cover (40).
11. Spinner gate housing (100) as claimed in any one of Claims 8 to 10, characterised in that at least one clamping claw bearing element (52) engages into a recess located on the outer edge of the guiding sleeve cover (40).
12. Spinner gate housing (100) as claimed in any one of the preceding Claims, characterised in that the foot elements (16) are two foot brackets which are aligned so as to be spaced-apart in parallel and mirror-symmetrical with respect to each other.

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