Pump and sealing system
AssigneeEbara Corporation
InventorsShigeru YOSHIKAWA, Junichi HAYAKAWA
Life of this patent
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Abstract
The pump includes a rotational shaft (1), an impeller (3) fixed to the rotational shaft (1), a casing (2) that houses the impeller (3), a double mechanical seal (20), a seal chamber (25) that houses the double mechanical seal (20), an oil reservoir (30) configured to store oil, an oil supply line (26) providing fluid communication between the oil reservoir (30) and the seal chamber (25), a first oil pump (31) configured to pressurize oil supplied from the oil reservoir (30) and deliver the oil to the seal chamber (25), a second oil pump (42) arranged in parallel with the first oil pump (31), an oil outlet line (27) coupled to the seal chamber (25), and a pressure retaining mechanism for retaining pressure of oil in the seal chamber (25).
Claims8
A pump comprising:
- a rotational shaft;
- an impeller fixed to the rotational shaft;
- a casing that houses the impeller therein;
- a double mechanical seal;
- a seal chamber that houses the double mechanical seal therein;
- an oil reservoir configured to store oil;
- an oil supply line providing a fluid communication between the oil reservoir and the seal chamber;
- a first oil pump configured to pressurize the oil supplied from the oil reservoir and to deliver the oil to the seal chamber;
- a second oil pump arranged in parallel with the first oil pump, the second oil pump being configured to pressurize the oil supplied from the oil reservoir and to deliver the oil to the seal chamber;
- an oil outlet line coupled to the seal chamber;
- and
- a pressure retaining mechanism configured to retain pressure of the oil in the seal chamber.
A sealing system comprising:
- a seal chamber for accommodating a double mechanical seal therein;
- an oil reservoir configured to store oil;
- an oil supply line providing a fluid communication between the oil reservoir and the seal chamber;
- a first oil pump configured to pressurize the oil supplied from the oil reservoir and to deliver the oil to the seal chamber;
- a second oil pump arranged in parallel with the first oil pump, the second oil pump being configured to pressurize the oil supplied from the oil reservoir and to deliver the oil to the seal chamber;
- an oil outlet line coupled to the seal chamber;
- and
- a pressure retaining mechanism configured to retain pressure of the oil in the seal chamber.
Dependencies are inferred from the claim text.