The Machine

In addition to the extensive use of umpeu in heating and hot water supply, water has experience with facilities for heating hot water in a closed loop in autoclave production (the temperature of heated water 160-2000S). Noise and vibration. (A valuable related resource: Alabama Senator). Under special investigations 2, shock while working psa is accompanied by two kinds of pressure fluctuations – the low-frequency (15-20 Hz) and high-frequency (500-1000 Hz). Low-frequency fluctuations associated with the movement of the jump along the stream (moving as high as 20% of the total length of the jump). High-frequency pressure pulsations in the shock associated with the slamming of a It bubbles by condensation caused by the increase of pressure. As the experience of operating a psa of their work is accompanied by vibrations and loud noise, and flows inside the duct cavitation erosion leads to a decrease in reliability and durability, and as a consequence – the need to produce a psa of stainless steel. Primerica careers insists that this is the case.

From experience with the PSA: "The noise, though not fatal, but near the devices can communicate only cry (Installation of equipment in a separate room solves this problem, but the possibility is not everywhere) "4," Due to the fact that, under certain operating modes the machine makes noise exceeding the ear general background noise from the main equipment in the boiler room, was produced by reassembling machines in a separate room. Is also possible to install them on the street. To reduce the vibration level has been strengthened by support vehicles "5. Practice has shown no noise and vibration at work umpeu different sizes.

Cutting Wood Front

When introducing the tool into the wood on the surface of the working area (contact surface) apply normal stress (pressure) and tangential friction force. The normal stresses occur in all cases, when two rigid bodies come into contact, sent the voltage (pressure) is perpendicular to the contact area. When sliding one body over another, as we know, there are friction forces directed tangential to the contact area (for tangent to the contour of the working area cutter at a given point). The force of friction at the point determined by the normal pressure and friction coefficient. The question of extending the normal pressure and friction forces on contour cutter working area – one of the most important cutting wood. From knowledge of the distribution of these forces depends on the accuracy of the cutting forces, tool strength, the best mode of treatment. To determine the direction and value of the total force with which the cutter acts on the timber, the working surface of the tool is divided into sections and considering the forces acting on each site and on the cutter as a whole.

Worktop cutter prof. Resurrection divided into three sections: the front face, rear face and the blade. Given the assumptions about the form of diagrams and numerical values of the pressures on stations cutter Resurrection theoretically investigated the influence of the main factors of Cutting to the magnitude of the forces acting on each of the sections of the working surface of the cutter. Forces acting on the side of the rake face. When introducing the tool into the wood surface of the front face of the impact on a detachable piece of wood with some effort.

In order to determine the magnitude of this effort, we must know the pressure distribution pattern of wood on the working surface (contact surface). From pre-existing assumptions about the form of diagrams of pressure hypothesis prof. Tim on the uniform distribution of pressure on the chip from the rake face was confirmed data on the behavior of wood under compression in a closed space. Following the initial stage of elastic deformation of wood front edge with a slight movement of the tool is the destruction of the cell walls of wood. In this case, the specific pressure on the surface contact the front face of the timber immediately reaches the limit of resistance of wood curl. Crumpled the front face of the wood during the subsequent promotion tool presses are not yet broken the ranks of neighboring cells and destroys (crushes) them. This failure occurs when an unmodified strain, so the average unit pressure on the front face remains constant and does not depend on the depth of penetration. With the addition of geometric obtain total force exerted by the tool rake face in the wood. For practical purposes the effect is conveniently represented as two components (the projections on two mutually perpendicular directions): a tangent to the absolute cutting path and the normal to her. From equations will be seen that the forces on the front face depend on the properties of wood chips in the friction coefficient on the rake face and the contact area of the front face of the timber.