| 摘要 |
A coolant or heating liquid circulation system of a cantilever-type centrifugal pump, provided with a bushing (11) sleeved on the periphery of a pump shaft (7), and a left sealing gland (51) and a right sealing gland (52) sleeved on the periphery of the bushing and sequentially linked in the axial direction of the bushing from the side of an impeller (10). Provided in the space between the left sealing gland and the bushing are a medium-end sealing dynamic ring (12) fixedly connected to the bushing and a medium-end sealing static ring (13) fixedly connected to the left sealing gland. Provided in the space between the right sealing gland and the bushing are an atmospheric-end sealing dynamic ring (17) fixedly connected to the bushing and provided in a portion of the space away from the left sealing gland, and an atmospheric-end sealing static ring (18) fixedly connected to the right sealing gland. A throttle ring (16) is provided between the inner circumferential surface of the right sealing gland and the bushing. Formed in the space between the right sealing gland and the bushing, the bushing, and the pump shaft is a heat-exchange liquid circulation channel connected to a heat exchanger (8) and flowing in the axial direction. The present circulation system provides cooling or heating directly to the part where cooling or heating is most required, thus allowing the temperature of a rotating component to be controlled within a set range at all times. |
