和氣式廻轉機關及びポンプに就て
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概要
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The rotary engine differs from the reciprocating engine in that the piston, or the equivalent, rotates about the cylinder axis, but the principle of its opration is equal to that of the reciprocating engine, and entirely different from that of the steam turbine. In the former, the static pressure actuates the piston, or the equivalent, while in the latter, the momentum of steam is imparted to the rotating element. The advantages of the rotary engine are many, but unfortunately the impracticability of satisfactorily paking the rubbing surfaces has more than offset the advantages and merely for this reason a commercially succesful rotary engine has not been found. The principal advantages of Wake's rotary engine, which we are to introduce to you, are that the leakage losses are diminished by dividing the operation into many stages, and that the expantion ratio can be determined at any larger value, keeping the torque nearly constant. The machine consists in two rotors, tightly covered with a twin cylindrical casing, timing gears and a pulley. The rotors are divided into many stages, each of which is of a sort of specially shaped gear pump construction. The steam is admitted into the highest pressure stage and is discharged into a second pressure stage, in which it operates and then it is discharged into a third stage and so forth. The steam leaked from one stage comes into the next stage and there it operates, therefore the leakage is recovered in the next stage. The volumes of the stages are enlarged gradually from the smallest at the highest pressure stage to the largest at the lowest pressure stage which enable the steam expansion, and the expantion ratio or the pressure in the last stage can be determined at any rate. Hence the steam energy itself at the lowest pressure stage can be made necessarily small and the leakage loss can be lessened to some extent. In this paper we state : 1. The general construction of the rotang engine. 2. The torque developed by the engine. 3. The power developed by the engine. 4. The principal advantages of the engine 5. Test data. 6. Advantages of the engine when it is used as a compressor, a vacuum pump and a liquid pump.
- 1927-05-20
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