DD200478A1 - DEVICE FOR EMPTYING SHOVELS OF SHOVELORS - Google Patents

Abstract

The invention relates to blades on blade wheels, in which discharge flaps are pivotally mounted with an area corresponding to the inner cross section of the blades about an axis disposed near the Schaufelradkoerper at the front blade opening. The actuation of such emptying flaps wear and low noise and to make with energetically favorable means, is the aim of the invention. According to the invention this is achieved by the articulated connection of the trailing edge of the emptying flaps 1 via control rods 2 with a rotatably mounted on an eccentric shaft 4 hinge star 3, wherein the eccentric shaft 4 on the drive side opposite blade wheel bearing 5 is arranged rotatable and lockable. Fig.1

Description

title

Device for emptying blades on paddle wheels

· Field of use

The invention relates to bucket wheel excavators for high and low cut in the field of open pit and bulk material handling technology ·

Characteristic of the known technical solutions

, Generally known are paddle wheels in cellular or cellless design with annular space, the Schaufein the conveyed exclusively by means of gravity discharge on a arranged next to the paddle conveyor belt «. (Z.3, US-PS 3968 580, DE-AS 2032 445, DS-OS 2016 324) .. -

According to the IP application Hr, 54-5603, a paddle wheel is known, whose blades are arranged by means of these. Rolls are guided by fixed curved guides so that a centrifugal discharge is achieved by the changed position of the blade in the drop "area"

Also known are paddle wheels with blades, which have emptying flaps for Zwansentleerung, which are actuated by levers and cams, have a corresponding inner cross-section of the blade surface and are pivotally mounted about an arranged at the front blade opening near the Schaufelradkörper axis, at the same time the centrifugal force for the Sntlee-. exploited tion and the conveyed is guided by a guide in his trajectory.

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(Execution of a paddle wheel in the Mining Institute Vuhu in Most / CSSR)

The conveyor belt is in this case behind the paddle wheel to keep the clearance angle of the Radauslegerkopfes as small as possible, which has an advantageous effect on the degradation technological conditions.

The disadvantages of the known solutions are that in the gravity discharge of the clearance angle of the Radauslegerkopfes not the desired small values are achieved or, in the operated via squatting discharge flaps high wear, noise level and unfavorable energy efficiency.

Object of the invention

The object of the invention is to avoid the mentioned disadvantages of the paddle wheels with positively emptied blades and to achieve a low-noise and low-wear as well as low-energy operation of the paddle wheels at the lowest free cutting angle of the wheel jib head.

In addition, an optimization between forced emptying angle and the gravity and centrifugal force shall be made possible by adjustability of the emptying mechanism in compliance with the condition

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Explanation of the nature of inventions

The invention is therefore based on the object to provide an adjustable actuation mechanism for emptying flaps of blades on paddle wheels, which ensures safe and complete shovel emptying in the optimal discharge area while avoiding a complicated or fault-prone arrangement of the actuators while securing the return of the emptying flap for sealing the Blade opposite the impeller body in the receiving area ·

According to the invention, the object is achieved in that at the heel of the trailing edge Snleserungsklappen the control rods are articulated _s are hinged at its other end to a rotatably mounted on an eccentric pivot shaft and that the eccentric shaft on the drive side opposite blade wheel bearings rotatable and lockable is arranged.

When turning the impeller and the joint star is generated by the eccentricity, a permanent change in distance between the respective points of the joint star and the associated blades, which is used for the actuation of the discharge flaps by means of the control rods.

In this case, the joint star is forced via a kinematic gear or the control rods themselves to synchronize with the paddle wheel, wherein the arrangement of the hinge points is defined on the hinge star by the condition that the torque around the eccentric shaft, formed from the direction of the control rod -and their distance to a parallel through the center of the eccentric shaft parallel in the direction of rotation is always positive ο

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The eccentric shaft of the joint star is designed so rotatable and lockable with bolts that an optimum between mixed centrifugal force and forced emptying can be achieved by the controlled emptying flaps on the emptying angle to the arranged behind the impeller conveyor belt by turning the same.

By transferring all partial movements through joints, friction, wear, noise and energy consumption are minimized,

embodiment

The invention will be explained in more detail with reference to an embodiment.

In the accompanying drawings show:

2 through a paddle wheel with an eccentric control of the emptying flaps (rotated by 90 °)

Fig. 2 section B-B of Fig. 1st

In the blades 9 of a paddle wheel 7 emptying flaps 1 are rotatably mounted on Schaufelradumfang each at the blade opening and according to the opening cross-section of -Schaufeln- 9 in this freely movable · At the rear end of the emptying flaps 1 control rods 2 are articulated, with an eccentrically mounted joint star 3 are hingedly connected, so that the three aforementioned parts 1, 2, 3 form a kinematic gear 6.

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The articulated star 3 is rotatably mounted on the eccentric shaft 4, which in turn on the drive side oppositely arranged paddle wheel bearing 5 by means of a lock, e.g. by means of a bolt 8, is mounted adjustable.

The inventive arrangement ensures a low-wear and smooth running with synchronous movement for Pördergutaufnahme and delivery using the gravity and centrifugal effect, since the forced operation of the discharge flap on the one hand in the receiving area ensures the safe closure of the blade against the Schaufelradinnenbereich and in the discharge area a complete blade emptying in tangential Direction secures.

Claims (3)

A device for emptying buckets on paddle wheels, in which discharge flaps are mounted with a surface corresponding to the inner cross section of the blade pivotable about an axis disposed on the front blade opening near the Schaufelradkörper axis, characterized in that in the vicinity of the trailing edge of the emptying flaps ( 1) control rods (2) are articulated, which are hinged at its other end to a rotatably mounted on an eccentric shaft (4) hinge star (3) and that the eccentric shaft (4) on the drive side opposite blade wheel bearing (5) rotatably and is arranged lockable. 2. Device according to item 1, characterized in that the articulated star (3) via a kinematic transmission (6) with the Schaufeirad (7) is connected. 2 3 3 117 3 Erf indungsan claim - ¹ o 3. Device according to item 1, characterized in that the eccentric shaft (4) is rotatably mounted and locked with a bolt (8) on the blade wheel bearing (5).   For this 2 pages drawings