Рух потоку сипкого матеріалу поверхнею робочого органу з плоскими лопатками
Abstract
UDC 631.358.42
TRAFFIC FLOW OF BULK MATERIAL TO SURFACE OF A WORKING BODY WITH THE FLAT VANES
М. Klendii, О. Klendii
Transfer branches in flexible screw conveyers are widely used for uploading and unloading process operations. However, the existing designs of transfer branches do not meet exploitation requirements in full measure. Main disadvantages are the following: an increased energy consumption, which is connected with the need of lifting the material at the point of its transfer in order to provide a gravity flow from a loading pipe line to an unloading one; the increased damage of grain material and the complexity of branch designs, especially at their considerable overall size.
In the familiar designs of transfer branches, in which the above mentioned problems are partially solved, the process of bulk load transfer becomes more complicated and under some operating conditions there is an increased possibility of congestion, which can cause a crash of a flexible screw conveyer.
In order to improve the performance criteria of flexible screw conveyers the design of a transfer branch with a central drive with unloading of screw operating devices in a horizontal plane has been designed.
One of the promising areas of work determining manufacturability of the screw conveyor is the use of helical spirals instead of plane inclined to the axis of rotation of the blades that attach to the cylindrical shaft base. These blades advisable to produce by stamping of sheet material and then welding them into a cylindrical shaft.
Defining the parameters of motion of a particle on the surface of the handling of the pipe to determine their main kinematic parameters that work surfaces working body transferred to the receiver. However, studies of convergence for all the flow speed of the conveyors is quite a challenge, because it breaks the flow observed in which particles can be disconnected in separate objects and interact with each other and work surfaces will wear stochastic nature. In this case, it is advisable to describe the flow parameters integrated indicators, particularly since the axial flow velocity component in the ascent of his blade defined as the average speed of each of the n - particles.
Determined angular and linear velocity of the flow of bulk materials. Analyzing the data dependence can see an analogy between the transporting cargo plane shovel from the exact angle and helix angle of ascent.
Defined in general, the transport capacity of screw conveyor using a horizontal pipe handling and blade working body and strike force acting on the working surface of the second screw. Established that values of force , and consequently energy loss in friction of a contact interaction and cargo will be minimal when . In addition, it will be minimal a loss of energy to speed up the work material unloading body/
In the article proposed new design of pipe reloading, which can increase the length of the conveyor transport of materials, for a total decrease in energy consumption.
A screw helices used in place of flat slanted to an axis of rotation of the of the blades that attach to the a cylindrical shaft base. Established that should be used inclined flat blades with sector scan 180º.
Displaying dependence for determining kinematic parameters of the flow of material into the screw conveyor with blade working body and deduced dependence for determination of bulk material transportation.
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