| 摘要 |
<p>A water cooling jacket to be disposed on the outer periphery of the motor frame comprising an outer cylinder and an inner cylinder, which are formed by pressing stainless steel plates and integrated into one unit by welding together the respective end portions of the outer and inner cylinders and to form a cooling water passage in a gap between the outer and inner cylinders and, the inner cylinder of the water cooling jacket has an inner diameter adapted to be press-fitted to the outer periphery of the motor frame, whereby the cooling water does not directly contact the motor frame, so that a motor frame even of gray cast iron will not rust, and hence the water cooling jacket is free from the problem of reddening of cooling water.</p> |
