| 摘要 |
A submersible motor which comprises a casing containing a chamber having open ends includes a flexible diaphragm (66) sealing one of the open ends. The diaphragm flexes outwardly to accommodate the expansion of a motor fill oil within the chamber, and includes an integral check valve (20) which permits the fluid in which the motor is submersed to flow into the chamber in response to a pressure differential but prevents fluid from flowing out of the chamber. A guard surrounds the check valve and extends into the chamber farther than the check valve to prevent the check valve from engaging any parts of the motor. The guard includes radial passages which provide fluid communication between the volume inside the guard and the region outside the guard. A filter is positioned over the inlet to the check valve, received in a snap fit in an annular recess defined by a boss on the flexible diaphragm having a resilient inwardly extending flange. The flexible diaphragm includes a peripheral sealing bead (74) to prevent fluid from flowing around the periphery of the flexible diaphragm. <IMAGE> |
