| 摘要 |
PURPOSE:To make a blade-angle change easily by making a worm-wheel between the drive-shaft and the main-shaft of a pump rotate by means of a worm operated from the outside of a shaft-joint portion. CONSTITUTION:The angle of the blade of a pump main-shaft 11 becomes variable through a tension rod 13 moving axially. A worm-wheel 20 is inserted into a space between the pump main-shaft 111 and a drive-machine-shaft 12 and meshes with a worm 23a formed at a spindle 23. Accordingly, through making the work 23a rotate with a tool from the outside, the worm-wheel 20 is made to rotate and the tension rod 13 is made to move axially. On account of this, a pump-blade-angle can be very easily changed provided the pump main-shaft is in a state of stoppage.
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