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31. 发明专利

JPH0828486A DOUBLE SUCTION-TYPE PUMP 失效
公开(公告)号：JPH0828486A
公开(公告)日：1996-01-30
申请号：JP18551594
申请日：1994-07-14
申请人： EBARA CORP
发明人： KOBAYASHI MAKOTO , YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA , MIYAZAKI YOSHIAKI
IPC分类号： F04D15/00 , F04D13/14 , F04D29/30
摘要： PURPOSE:To make the characteristic curve of pump efficiency gentle and flat, so as to enable the approximately same efficiency to be maintained even when the moving point is changed, by parallely providing two impeller elements having different flow- head characteristic. CONSTITUTION:In double suction-type pump, an impeller element A is constituted of an A side plate 62, an A vane 64, and a main plate 61, and an impeller element B is constituted of a B side plate 63, a B vane 65 and the main plate 61. The diameter D2A of the impeller element A is larger than the diameter D2B of the impeller element B, and the suction diameter D1A of the impeller element A is larger than the suction diameter D1B of the impeller element B. Therefore, pump characteristics of the impeller element A and the impeller element B are different from each other. That is, the pump efficiency of the impeller element B is higher than that of the impeller element A in the small flow rate and in the high head, while the pump efficiency of the impeller element A is higher than that of the impeller element B in the large flow rate and in the low head. As a result, the efficiency at the maximum efficiency point is made relatively a low value, but the efficiency curves of both suction pumps are made gentle with a little efficiency fluctuation in the total flow rate range.

32. 发明专利

JPH07317664A PROTECTIVE DEVICE FOR PUMP 失效
公开(公告)号：JPH07317664A
公开(公告)日：1995-12-05
申请号：JP13519094
申请日：1994-05-25
申请人： EBARA CORP
发明人： KAWAGUCHI HITOSHI , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA , MIYAZAKI YOSHIAKI
IPC分类号： F04C2/00 , F04B49/10 , H02K7/14
摘要： PURPOSE:To give the interrupting capability to a pump itself by operating an automatic cut protective device when an external abnormality signal is inputted. CONSTITUTION:A pump 1 stores an automatic cut protective device 13 opening a bimetal switch via the temperature rise when the temperature of a motor abnormally rises, interrupting the winding circuit of the motor, and stopping the motor. The temperature rise is sent to the automatic cut protective device 13 via the external abnormality signal 8 related with the operation of the pump 1, the bimetal switch of the protective device 13 is opened, and the motor is stopped.

33. 发明专利

JPH07177699A CANTILEVER BEARING TYPE MOTOR AND PUMP EMPLOYING IT 失效
公开(公告)号：JPH07177699A
公开(公告)日：1995-07-14
申请号：JP34624693
申请日：1993-12-22
申请人： EBARA CORP
发明人： KOBAYASHI MAKOTO , YAMAMOTO MASAKAZU , TOKUCHI MASAICHI , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA
IPC分类号： F04D13/06 , F04D29/046 , F04D29/047 , H02K5/16
摘要： PURPOSE:To facilitate assembling by providing a coupling part for transmitting power at one end of a spindle having the other end secured with the rotor of a motor and disposing all bearings at the intermediate part between the coupling part and the rotor thereby ensuring the concentricity of bearing easily. CONSTITUTION:The motor M comprises a stator assembly 1, a rotor assembly 10, and tightening members, e.g. bolts and nuts. The stator assembly 1 comprises a cup-like motor frame 2 and a stator on the inside thereof. The rotor assembly 10 comprises a spindle 11 and a rotor supporting ring 19. The spindle 11 carries a load side bearing 13 and counter load side bearing 14 disposed on the inside of the rotor supporting ring 19 and supported rotatably. Both bearings 13, 14 are held by single bracket 17 thus forming a cantilever bearing. This structure simplifies the assembling work while enhancing the concentricity of bearing.

34. 发明专利

JPH07109989A PUMP DEVICE 失效
公开(公告)号：JPH07109989A
公开(公告)日：1995-04-25
申请号：JP28011193
申请日：1993-10-13
申请人： EBARA CORP
发明人： KOBAYASHI MAKOTO , YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA
IPC分类号： F04D13/06 , F04D29/60
摘要： PURPOSE:To provide a pump device which has a small size and saves an installation space, being provided with a power cable without requiring a large terminal box. CONSTITUTION:A motor frame outer barrel 14 is provided on an outer periphery of a stator of a motor. A circular space 40 is formed between an outer cylinder 2 and an outer peripheral surface of the motor frame outer barrel 14. A pump part introduces liquid to the circular space 40. A power source connecting lead wire is extracted from the side surface of the outer cylinder 2. A cable housing 20 is provided for passing the lead wire. The cable housing 20 is welded and brought to close contact with the motor frame outer barrel 14. The outer cylinder 2 is welded and brought to close contact with the cable housing 20.

35. 发明专利

JPH07109988A FULL ROUND FLOW TYPE CANNED MOTOR PUMP 失效
公开(公告)号：JPH07109988A
公开(公告)日：1995-04-25
申请号：JP28011393
申请日：1993-10-13
申请人： EBARA CORP
发明人： YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA
IPC分类号： F04D13/06 , F04D29/70
摘要： PURPOSE:To provide a full round flow type canned motor pump which can prevent entering of slurry in respect to a rotor chamber without a filter. CONSTITUTION:In a canned motor pump, a circular space 55 is formed an an outer periphery of a canned motor 22. One end of the motor is provided with a pump suction port and impellers 15, 16. Self liquid is suctioned from the other end into a rotor chamber R, and discharged from the side of the impellers. A sand collar 40 for removing slurry is installed on a shaft end on the opposite side to the impellers.

36. 发明专利

JPH0735088A FULL CIRCUMFERENTIAL FLOW TYPE MOTOR PUMP 失效
公开(公告)号：JPH0735088A
公开(公告)日：1995-02-03
申请号：JP20026493
申请日：1993-07-20
申请人： EBARA CORP
发明人： YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI , UEI KEITA
IPC分类号： F04D13/06
摘要： PURPOSE:To provide a full circumferential flow type motor pump which has a pump-casing outer shell and a motor frame which are formed into different components and are not required to be secured to each other by welding, etc. CONSTITUTION:In a full circumferential flow type motor pump comprising a circular passage formed between a motor 6 and a pump casing 1 that houses the motor 6, the lead wire of the motor 6 being taken out from one side of a pump-casing outer shell 2, the pump-casing outer shell 2 and a motor unit 5 having the motor 6 and an impeller 8 secured to the main shaft 7 of the motor 6 are formed into different components. A lead-wire-takeout short pipe 20 is provided on one side peripheral portion of the motor unit 5 and inserted into a hole 2a provided in the pump-casing outer shell 2, and the space between the hole 2a and the lead-wire-takeout short pipe 20 is sealed, and a holddown member 40 is inserted between the pump-casing outer shell 2 and the motor unit 5.

37. 发明专利

JPH06221294A ALL ROUND FLOW TYPE IN-LINE PUMP 失效
公开(公告)号：JPH06221294A
公开(公告)日：1994-08-09
申请号：JP2867793
申请日：1993-01-25
申请人： EBARA CORP
发明人： YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI
IPC分类号： F04D13/06 , F04D29/70
摘要： PURPOSE:To provide an all round flow type in-line pump, by which slurry can be prevented from entering a rotor chamber without a filter. CONSTITUTION:An impeller 15 is installed in a suction side casing 1, an auxiliary impeller 40 having a main plate 40a on the rotor chamber R side and a blade on the discharge side is installed in a discharge side casing 5, an opening communicating with the rotor chamber R is provided on the suction side end part of a motor frame 23 of a canned motor 22, a partition plate 41 for partitioning between the rotor chamber R and the auxiliary impeller 40 is provided on the discharge side end part of the motor frame 23, and an opening communicating with the rotor chamber R is formed on the partition plate 41.

38. 发明专利

JPH06221291A PUMP DEVICE 失效
公开(公告)号：JPH06221291A
公开(公告)日：1994-08-09
申请号：JP2867593
申请日：1993-01-25
申请人： EBARA CORP
发明人： KOBAYASHI MAKOTO , YAMAMOTO MASAKAZU , MIYAKE YOSHIO , ISEMOTO KOUJI
IPC分类号： F04D7/04
摘要： PURPOSE:To provide a pump device in which a main pump is protected from abrasion and choking by providing a slurry separating device on the suction side of the main pump. CONSTITUTION:A pump device is provided with a main pump 1 for increasing the pressure of a liquid and force-feeding the same and a cyclone separator 4 having a cleaning liquid discharge port and a concentrated slurry discharge port for separating a liquid into a cleaning liquid and concentrated slurry, wherein the cleaning liquid discharge port of the cyclone separator 4 is connected to a suction port of the main pump 1.

39. 发明专利

JPH05332298A SHEET METAL PUMP CASING 失效
公开(公告)号：JPH05332298A
公开(公告)日：1993-12-14
申请号：JP16538592
申请日：1992-06-01
申请人： EBARA CORP
发明人： YAMAMOTO MASAKAZU , SAKAGAMI HIROMI , ISEMOTO KOUJI
IPC分类号： F04D29/42 , F04D29/62
摘要： PURPOSE:To provide a light-weight flange whereby the flange wall thickness of suction and delivery flanges can be reduced and also shorten suction and delivery nozzles of a pump. CONSTITUTION:In a sheet metal pump casing with a casing main body 1 and at least either of a suction flange 7 and a delivery flange 6, a suction nozzle 3 which is connected to a suction flange 7 and a delivery nozzle 5 which is connected to a delivery flange 6 are provided, and at least either of the suction nozzle 3 and delivery nozzle 5 has a larger outside diameter than that used for determining the nominal size of a pump. Also the suction flange 7 or delivery flange 6 which is mounted on the larger outside diameter part is formed in thick wall at the internal mounting part, and a bolt mounting part which is located on the outside of the mounting part is formed in thin wall.

40. 发明专利

JPH05332297A SHEET METAL PUMP CASING 失效
公开(公告)号：JPH05332297A
公开(公告)日：1993-12-14
申请号：JP16538492
申请日：1992-06-01
申请人： EBARA CORP
发明人： KOBAYASHI MAKOTO , YAMAMOTO MASAKAZU , SAKAGAMI HIROMI , ISEMOTO KOUJI
IPC分类号： F04D29/42 , F04D29/08
摘要： PURPOSE:To provide highly rigid suction and delivery nozzles, secure rigidity of flange units of suction and delivery flanges, select a material for the main components of the flanges different from that of a pump casing, and also cope with various standards. CONSTITUTION:In a sheet metal pump casing with a casing main body 1 and at least either of a suction flange 7 and a delivery flange 6, a suction nozzle 3 which is connected to a suction flange 7 and a delivery nozzle 5 which is connected to a delivery flange 6 are provided, and at least either of the suction nozzle 3 and delivery nozzle 5 is connected to the easing main body 1 and comprises a roughly cylindrical annular member which forms a sealing surface with a mating flange. Also the suction flange 7 or delivery flange 6 which is fixed to the annular member comprises a thick wall rigid member which forms a connection with the mating flange.

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