CENTRIFUGAL PUMP
First Claim
1. A method for manufacturing a shaft seal arrangement for sealing a shaft with respect to a surrounding casing, the method comprising the steps of:
- providing a seal arrangement comprising slide rings with a sealing gap between the slide rings;
forming a cavity which within the seal arrangement which is in fluid-leading connection with the sealing gap between the slide rings;
at least partially filling the cavity with a fluid during an assembly of the seal arrangement.
1 Assignment
0 Petitions
Accused Products
Abstract
A cartridge seal is provided for sealing a shaft (4) with respect to a housing (2) and is intended to be a slide ring seal arrangement (12) for a centrifugal pump. The cartridge seal includes a shaft protection sleeve which is rotationally connected to the shaft (4) by a retaining ring, a support (24) for incorporating the cartridge seal into a housing opening of the pump housing (2), a slide ring which is rotationally connected to the shaft protection sleeve and a counter slide ring which is rotationally connected to the support (24), as well as an enclosed space (30) within the sealing arrangement. The space (30) is fluidically connected to a sealing gap formed between the slide ring and the counter slide ring, and is at least partially prefilled with liquid in order to prevent dry running when the pump is operated for the first time.
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Citations
20 Claims
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1. A method for manufacturing a shaft seal arrangement for sealing a shaft with respect to a surrounding casing, the method comprising the steps of:
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providing a seal arrangement comprising slide rings with a sealing gap between the slide rings; forming a cavity which within the seal arrangement which is in fluid-leading connection with the sealing gap between the slide rings; at least partially filling the cavity with a fluid during an assembly of the seal arrangement. - View Dependent Claims (9, 11, 19, 20)
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2. A single-stage or multi-stage centrifugal pump comprising:
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a pump casing; a shaft which is rotatably arranged in the pump casing; at least one impeller arranged on the shaft, for the delivery of fluid; a shaft seal arrangement between the shaft and an opening of the casing, through which opening the shaft is led, with a closed-off cavity within the seal arrangement, the closed-off cavity is at least partly pre-filled with a fluid, wherein the fluid has been filled on assembly of the seal arrangement. - View Dependent Claims (3, 4, 5, 6, 7, 8, 10)
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12. A cartridge seal for sealing a shaft with respect to a casing, as a shaft seal arrangement for a centrifugal pump the cartridge seal comprising:
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a shaft protection sleeve; fixing means for providing a rotationally fixed connection of the shaft protection sleeve to the shaft; a carrier for integrating the cartridge seal into a casing opening; a rotating slide ring rotationally fixedly connected to the shaft protection sleeve; a stationary slide ring rotationally fixedly connected to the carrier; and a closed cavity, wherein the closed-off cavity is fluid conveyingly connected to a sealing gap which is formed between the rotating slide ring and the stationary slide ring, and the closed-off cavity is at least partly pre-filled with a fluid. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification