公开(公告)号：US20220186686A1

公开(公告)日：2022-06-16

申请号：US17443000

申请日：2020-03-10

Applicant: EBARA CORPORATION

Inventor： Shuichiro Honda ,  Kozo Matake ,  Hiroyoshi Watanabe ,  Toshimitsu Barada ,  Hayato Ikeda

IPC: F02K9/46 ,  F04D13/06 ,  F04D29/58

Abstract: Provided is a canned motor in which vaporization of the handling liquid is reduced in a case where a rotor rotates at high speed. A canned motor 10 includes a stator 18 disposed in a stator chamber 26, a rotor 14 disposed in a rotor chamber 12, and a stator can 7 enclosing the rotor 14. Furthermore, the canned motor 10 includes a stator chamber inlet portion 43 configured such that a cooling liquid for cooling the stator 18 flows into the stator chamber 26, and a stator chamber outlet portion 44 configured such that the cooling liquid flows out from the stator chamber 26.

公开(公告)号：US11549516B2

公开(公告)日：2023-01-10

申请号：US17260771

申请日：2019-07-19

Applicant: Ebara Corporation

Inventor： Tetsuji Kasatani ,  Shuichiro Honda

IPC: F04D29/08 ,  F04D27/00 ,  F04D29/40 ,  F16J15/18 ,  F16J15/34 ,  F16J15/44 ,  F16J15/447 ,  G01F23/00 ,  G01K13/00 ,  G01M3/28

Abstract: The present invention relates to a sealing system for a pump configured to pressurize a volatile liquid, such as liquid ammonia. The sealing system (2) includes a stuffing box (35) forming a barrier chamber (30) and a pump-side seal chamber (43), a mechanical seal (20) arranged in the barrier chamber (30), and a barrier-gas supply system (32) for supplying a barrier gas into the barrier chamber (30). The barrier gas has a pressure higher than a pressure of the volatile liquid in the pump-side seal chamber (43). The pump-side seal chamber (43) is located between an impeller (7) of the pump (1) and the mechanical seal (20). The barrier-gas supply system (32) includes a pressure control valve (50) configured to maintain a constant difference between pressure in the barrier chamber (30) and pressure in the pump-side seal chamber (43).