| 摘要 |
A vacuum pump with a planetary gear accelerator which comprises: a pump chamber formed in a pump housing; a pump rotor accommodated in said pump chamber; a rotor shaft attached to said pump rotor; a sun gear formed on this rotor shaft; and planetary gears arranged so as to constitute a planetary gear device together with said sun gear and connected to an input shaft, said planetary gear device having a gear ratio which is set so that the rotation of said pump rotor is accelerated relative to the rotation of said input shaft. Thus, the vacuum properties of the engine at times of low-speed rotation are stabilized, and high vacuum properties are guaranteed. Moreover, in addition to seeking a more compact and light-weight design, the intensiveness and standardization of vacuum pumps meeting the maximum performance requirements are realized.
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