中英文文献中英文翻译新型节能机械搅拌器和挤压模具设计概述.doc

英文原文 New energy-saving mechanical mixer and Overview of adaptable die design for extrusion Abstract In the work there are described the results from the laboratory researches of the basic characteristics (performance) of one new type of energy-saving mechanical mixer, conditionally named ‘Eleron’. These characteristics (performance) are compared with respective results of the other known in the literature and successfully used in practice mixers. The mixer is designed for mixing and aerating liquid systems and it will be effective for mixing in the ferment reactors for biochemical industries, where the processes are energy absorbing. Keywords: Mixer; Air-saturation; Power-number; Heat and mass-transfer during mixing; Aeration-number 1. Introduction In implementing a long-term, energy-saving program for industry [1], the department of Heat and Mass-Transfer Technics in TU-Sofia, under the guidance of the author, has conditionally created for patent an original construction of energy-saving mixer. It has a universal function for mixing liquid systems in chemical, food, wine, tobacco, and biochemical industries. We expect our mixer to take its place with dignity in fermentation technics, because of its easy manufacture, good results in air-saturation and low energy consumption. Till now it was the investigated laboratory version of ‘Eleron-1’ mixer, which is a small type, with D=(0.25/0.35)T. Universal appearance of mixer is shown in Fig. 1. It consists of a central round disk (1), which is carrying pap (2) and four wings (3). The wings are cut through in the middle (a–a) and in the beginning, near the round disk (c–c), and the receiving pieces are bend arch-shaped up and downward, making four blades with radius R=(0.05/0.07)D. Their length is L=0.8pR, as (considered) from line of bend. The blades on each following wing are in different order in bend direction, and because of this in working conditions there are circumstances for v