PYAG-100 cell feeder

Contents

1. Purpose and scope of cell feeders

2. Technical characteristics of cell feeder of PYAG-

3. Device and operation principle of cell feeder of PYAG-

4. Material selection for manufacturing parts

List of literature used

Feeder Purpose and Scope

Feeders are used for uniform supply of materials from hoppers to dispensers, transporting machines and other technological equipment. By the nature of the movement of the working elements, feeders with continuous movement of the working element along the closed circuit (tape, chain, plate) are distinguished; with oscillatory motion (vibration, sector, tray); with rotational movement (screw, drum, cell, poppet).

Feeders also function as gates.

A rotary cell feeder of the PYAG100 is used to supply powdered and granular materials. It can be used as an independent device or as an integral part of dispensers. This feeder is also used to seal the outlet pipes of cyclones and supply loose hot (up to 3000C) materials.

The use of the cell feeders of the PYAG100 model with proper accuracy ensures optimal mill productivity and reduced power consumption.

During operation of feeders safety requirements shall be observed. During operation of the feeders, it is strictly forbidden to clean them, to facilitate manual passage of the material or to adjust the elements.

Moving parts of feeders shall be protected. During preventive inspections, it is necessary to thoroughly clean the feeder work areas, since otherwise their normal operation and dosing accuracy will be disturbed. These operations can be carried out only if the engines are disconnected from the network and if the working elements are mechanically locked.

3. Device and operation principle of PYAG-100 cell feeder

Rotor 3 equipped with blades 4 forming sixteen cells is installed in body of feeder 2 closed with end covers 1. Rotor shaft is driven by motor 8 through reduction gear 7. Rotor housing is protected from wear by replaceable sleeve 5 with openings coinciding with inlet and unloading holes of housing. Diagonally arranged ribs 6 are installed in openings of sleeve. The blades forming the cells made of heat-resistant spring steel are attached to the rotor so that the outer diameter described by them in the free state exceeds the inner diameter of the sleeve, thereby ensuring their tight pressing to the sleeve and tightness of the closure. Material dosing is ensured due to batch delivery of material from rotor cells during its rotation.

Due to the presence of tangentially arranged ribs in the openings of the sleeve, wear of the blades occurs more evenly. Seal tightness in axial direction is provided by labyrinth and gland seals.

Material selection for manufacturing parts

The purpose is to select the material for the part, taking into account the properties, working conditions and structures, the nature of the loads and stresses.

It is more expedient to make a shaft in two ways: 1) to obtain a shaft from a rod; 2) obtaining the shaft from forging.

In this shaft there are large differences in diameters along its entire length, and it is symmetrical with respect to the center, so it is better to make a shaft from a stamped blank on a KGShP. Accuracy class 9. For the manufacture of the shaft, the following steel grades can be distinguished: steel 35, steel 35L, steel 45X.

Based on the operating condition of this shaft, note that the shaft is in constant dynamic load, therefore steel 35 is not suitable for us, since it is used for parts of low strength experiencing small stresses.

45X steel is used for parts operating under low dynamic loads, and mechanical treatment of the part is possible only when the workpiece is heated.

The 35L steel part will be able to withstand high dynamic loads, temperature heating and is well machined.

Based on the above, 35L steel is finally selected for the shaft. The shaft in the 50 mm long and 60 mm diameter section is treated to a roughness of 1.25Ra, since a bearing with a fit of H7/d8 is pressed on it.

Blades on rotor are made by stamping. The advantages of stamping are that small allowances, the absence of internal cracks, the absence of gate shells, and low surface roughness are possible. Therefore, we will make blades by stamping from 50CFA heat-resistant spring steel, since parts of this steel operate at a temperature of up to 3000C and withstand high dynamic loads.