油圧と空気圧
Online ISSN : 2185-5285
Print ISSN : 0286-6900
ISSN-L : 0286-6900
16 巻, 3 号
選択された号の論文の3件中1~3を表示しています
  • 鈴木 勝正
    1985 年 16 巻 3 号 p. 191-197
    発行日: 1985年
    公開日: 2010/10/21
    ジャーナル フリー
    Oil hammerg enerates much greater pressure than that is supplied to the pipe line. The author intended to utilize this pressure rise phenomenon and invented an intensifier on a new principle which can convert oil pressure into a value more than six times higher by means of oil hammer.
    The new intensifierh as the followinga dvantageso ver the usual intensifier which consists of two cylinders of different areas.
    (1) The device is simple and can be made at low cost.
    (2) Controlling of output pressure and starting and stopping of the intensifier can be done by switching ON and OFF one solenoid controlled valve.
    In the present research, the new intensifier is applied to an oil cylinder. First, a pressure vessel is examined as the model of the oil cylinder. The theoretical results calculated numerically predict accurately the experimental results. The approximate expression is derived and predicts well the pressure rise and the maximum output pressure.
    The experiment confirmedt hat the oil cylin d er is operated at pressure several times higher than that is generated by a pump.
  • 黒下 清志, 市川 常雄
    1985 年 16 巻 3 号 p. 198-206
    発行日: 1985年
    公開日: 2010/10/21
    ジャーナル フリー
    The static performance of hydraulic motors can be described with the aid of mathematical models created by Wilson, SchlOsser, etc. The compressibility of working fluid is not considered in these models however, and therefore they can not be applied to air motors which deal with compressed air. In this study, a mathematical model for the output torque and the air consumption of air motors is developed, and the experiments on a radial piston air motor yield data which substantiatest he theory.
    Next, the static performancec haracteristics of an air motor with a restrictor are obtained by using the mathematicalmodel for air motors and the flow characteristics of the restrictor, theoretically. Furthermore, the additional experiments on the air motor with a restrictor give data confirming the predictions of the theory concerning the performance.
    As a result of this study, the possibility of the optimum design of pneumatic system which consists of an air motor and the other pneumaticc omponents is indicated.
  • 黒下 清志, 市川 常雄
    1985 年 16 巻 3 号 p. 207-213
    発行日: 1985年
    公開日: 2010/10/21
    ジャーナル フリー
    In a actual pneumatic apparatus, not only an air motor is used individually, but is also used widely with accesories like a speed controller. The starting performance of an individual air motor has been already investigated, but the starting performance of the air motor with accessories is not yet investigated.
    In this report, accessories are substituted for a restrictor and the performance of the air motor with the restrictor in the starting phase has been analyzed by the numerical method. The analytical results have been confirmed by experiments with a radial piston air motor. Following are some of the results of studies:
    (1) Close agreement between experimental and theoretical results of rotational speed, inlet port pressure and outlet port pressure was obtained.
    (2) In the case of a small volume between the air motor and the restrictor, the effect of the effective area on the time lag and the rise time became clear.
    (3) The influence of the volume between the air motor and the restrictor on the time lag and the rise time was elucidated.
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