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31. 发明专利

JP2001289191A PUMP BEARING DEVICE 失效
公开(公告)号：JP2001289191A
公开(公告)日：2001-10-19
申请号：JP2001050752
申请日：2001-02-26
申请人： HITACHI LTD
发明人： AIZAWA KOJI , YAMAGUCHI AKIRA , NAGASAWA SHIGENOBU , MATSUI SHIRO , TAKADA KUNIO , CHIBA YOSHIAKI
IPC分类号： E03F5/22 , F04D13/00 , F04D29/04 , F04D29/046 , F04D29/047 , F16C17/14 , F16C33/24
摘要： PROBLEM TO BE SOLVED: To provide a pump bearing device capable of stably performing a repeated aerial operation for 30 minutes or longer without feeding the lubricating fluid from the outside to a bearing. SOLUTION: This ceramic bearing device comprises a ceramic bearing 4 slidably supporting a sleeve 2 fixed to a pump spindle 1, a bearing case 5 having the ceramic bearing 4 installed therein, and a bearing casing 7 elastically supporting the bearing case 5 by a rubber 6. A cylindrical container 18 is fixed to the bearing casing 7 so as to surround the lower surface and the outer peripheral side of the bearing casing 7, and a water storage tank 11 having a return plate 13 installed at the upper end part thereof is fixed to the pump spindle 1 so as to surround the cylindrical container 18. Passages 20 and 21 are provided in the cylindrical container 18, and spacers 19 are installed between the outer peripheral part of the bearing casing 7 and the inner peripheral part of the cylindrical container 18. A passage 22 is formed in the spacer 19.

32. 发明专利

JP2000257588A DRAINAGE PUMP COPING WITH SUBMERSION OF STATION UNDER WATER 失效
公开(公告)号：JP2000257588A
公开(公告)日：2000-09-19
申请号：JP5662199
申请日：1999-03-04
申请人： HITACHI LTD
发明人： AIZAWA KOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： E03F5/22 , F04D13/00 , F04D29/04 , F04D29/046 , F04D29/06 , F04D29/70
摘要： PROBLEM TO BE SOLVED: To prevent the damage of a bearing sliding surface even if a drain plant is submerged under water by constituting a guide bearing device by a bearing case disposed on an outer periphery of a sleeve fixed to a pump main shaft, a plurality of segment shaped bearings disposed between the bearing cases, an oil tank for accumulating lubricating liquid, and a foreign matter separating member. SOLUTION: In an inner part of a pump casing 17 to which a water flow path is formed, a pump main shaft 1 wherein a runner 16 is fixed to a lower part is rotatably supported by a guide bearing device 3 and a thrust bearing device 3a, and a foreign matter separating member 19 is disposed enclosing the pump main shaft 1. In the case where a drainage pumping station is submerged under water, at a time point when pumped liquid (rain water) invaded into a pump casing upper surface 17a attains the foreign matter separating member 19, a foreign matter such as sediment contained in the pumped liquid is prevented from invading, and only fresh water is invaded into the inside of the foreign matter separating member 19. The fresh water is invaded to each bearing devices 3, 3a, lubricating liquid in the oil tank is pushed and substituted, an is held in a fresh water lubricating condition. In is thus possible to ensure a stable bearing performance.

33. 发明专利

JP2000120584A BEARING DEVICE AND VERTICAL SHAFT DRAIN PUMP USING IT 失效
公开(公告)号：JP2000120584A
公开(公告)日：2000-04-25
申请号：JP29781598
申请日：1998-10-20
申请人： HITACHI LTD
发明人： AIZAWA KOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： F04D29/046 , F04B53/00 , F04D13/00 , F04D29/04
摘要： PROBLEM TO BE SOLVED: To lubricate a thrust bearing sliding part with lubricating liquid even if water invades into an oil tank, and surely prevent a damage by arranging means for reserving lubricating liquid of the thrust bearing sliding part in the oil tank. SOLUTION: In this bearing device suitable to a vertical shaft drain pump, a thrust block 2 is fixed to a pump main shaft 1, a bearing case 4 is arranged on an outer peripheral position of the thrust block 2, and a plurality of segment guide bearings 3 are arranged along a circumferential direction between the thrust block 2 and the bearing case 4. A collar 9 is attached to a lower part of the thrust block 2, and a plurality of pad type thrust bearings 10 are arranged opposing to the collar 9. The whole is dipped in lubricating liquid 19 in an oil tank 6. In this case, an inner cylinder 8 and an external cylinder 8 as a lubricating liquid reserving part are arranged on the pad type thrust bearing part 10 so as to enclose the collar 9 and the thrust bearing 10 at prescribed clearances, and lubricating performance of the bearing part 10 is held in a high level.

34. 发明专利

JPH11336746A THRUST BEARING AND MIXED FLOW PUMP 失效
公开(公告)号：JPH11336746A
公开(公告)日：1999-12-07
申请号：JP14698398
申请日：1998-05-28
申请人： HITACHI LTD
发明人： OKADA RYOJI , AIZAWA KOJI , NAGASAWA SHIGENOBU , AKIBA HIDEKI
IPC分类号： F04D29/046 , F04D11/00 , F04D29/04 , F16C17/03 , F16C17/06 , F16C17/14 , F16C33/12 , F16C33/20 , H02K5/167
摘要： PROBLEM TO BE SOLVED: To conduct operation over a fixed period of time without stopping in a short time even if the bearing is flooded, in a thrust bearing and a mixed flow pump. SOLUTION: In this thrust bearing which bears a thrust collar mounted on a rotating shaft with a plurality of support plates 132 disposed around the rotating shaft, a synthetic resin material (glass fiber-impregnated PTFE) surface 132a and a hard material surface 132b containing tungsten carbide or chromium carbide are formed on the side which bears the thrust collars of the support plates 132. The resin material surface 132a is placed higher than the hard material surface 132b. The resin material surface 132a usually demonstrates bearing properties favorably working in oil. Even if flooding occurs, the hard material surface 132b inhibits the abrasion of the resin material surface 132a caused by invasion of soil into river water to be equal to or less than the hard material surface.

35. 发明专利

JPH11294690A SEGMENT TYPE BEARING DEVICE AND VERTICAL SHAFT DRAIN PUMP 失效
公开(公告)号：JPH11294690A
公开(公告)日：1999-10-29
申请号：JP9460698
申请日：1998-04-07
申请人： HITACHI LTD
发明人： AIZAWA KOJI , OKADA RYOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： F16N9/02
摘要： PROBLEM TO BE SOLVED: To provide a segment type bearing device which can maintain stable bearing performance for a long time even if drain machine space at which a vertical shaft drain pump is installed is flooded. SOLUTION: A segment type bearing device 25 has a sleeve 2 fixed to a pump main shaft 1, a bearing case 6 arranged on the outer periphery of the sleeve 2, a plurality of segment-shaped guide bearings 5 arranged circumferentially between the bearing case 6 and the sleeve 2, an oil tank 7 for storing lubricating liquid 11 for the sleeve 2 and sliding portions 5a of the guide bearings 5. In the device 25, an cylindrical container 3 for preventing the lubricating liquid 11 for the sleeve 2 and the sliding portions 5a of the guide bearings 5 from being replaced by rain water is provided in the oil tank 7. Thus, if rain water intrudes into the oil tank 7, the sliding portions 5a is always lubricated with the lubricating liquid 11 not to be broken. Because flow-out amount of the lubricating liquid 11 in the oil tank 7 can be reduced, only flow-out amount of the lubricating liquid 11 may be replenished.

36. 发明专利

JPH1182749A SEGMENT TYPE SHAFT SEAL DEVICE AND DRAINAGE PUMP PROVIDED WITH THE SAME 失效
公开(公告)号：JPH1182749A
公开(公告)日：1999-03-26
申请号：JP24502297
申请日：1997-09-10
申请人： HITACHI LTD
发明人： AIZAWA KOJI , AKIBA HIDEKI , NAGASAWA SHIGENOBU
IPC分类号： F04D29/10 , F16J15/18
摘要： PROBLEM TO BE SOLVED: To obtain a pump shaft seal device which is a segment type shaft seal device preventing leakage of fluid from a clearance of the rotary shaft of a pump and a pump casing passing through part, has little leakage water quantity and is capable of stably performing a negative pressure operation for long time without feeding lubricating water of sealing materials from the outside of a pump. SOLUTION: This device is a segment type shaft seal device 3 in which a sleeve 2 is fixed to a pump main shaft 1 and a seal case 6 arranged at the outer peripheral location of the sleeve 2 and a plurality of segment-shaped sealing materials 4 disposed along the peripheral direction between the seal case 6 and the sleeve 2 are arranged and is provided with a pressure reduction means at a clearance constituted of side surfaces on the atmospheric sides of the sealing materials 4 and cover surfaces opposed to these side surfaces. Thus, leaking water quantity is reduced and a negative pressure operation for long time can be stably performed without feeding lubricating water of the sealing materials 4 from the outside of a pump.

37. 发明专利

JPH1113693A VERTICAL SHAFT PUMP PROVIDED WITH DOUBLE SPIRAL CASING 失效
公开(公告)号：JPH1113693A
公开(公告)日：1999-01-19
申请号：JP16688497
申请日：1997-06-24
申请人： HITACHI LTD
发明人： HATSUDA TOSHIO , SAITO NAOTO , NAGASAWA SHIGENOBU , YOSHIDA TAKESHI
IPC分类号： F04D13/00 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To reduce the thickness of a bulk head part by vertically arranging a projection part on a steel plate which is brought into contact with a bulk head of a steel made outer and inner side flow passage walls, and arranging a reinforced reinforcement or rib freely to separate, on a surface of the bulk head side made of a steel plate which is brought into contact with the bulk head. SOLUTION: A projection part 1 is vertically arranged on a steel plate of a bulk head part 9a side of a steel made inner and outer side flow passage walls 4, 5, and an overhanging part 1a is arranged on the tip end of the projection part 1, reinforcements 2a, 2b with hooks are welded on a surface of the steel made bulk head side of the bulk head part 9a side, and a reinforcement 42 is installed thereon. In the case where the outer and inner side flow passage walls 4, 5 are independently manufactured, the inner and outer side flow passage walls 4, 5 can be arranged so as to assemble the reinforcements 2a, 2b with each other by means of crane work, a position is held by a stay 3 until concrete is placed on the bulk head part 9a. It is thus possible to eliminate arrangement work, and it is also possible to shorten the width of the bulk head 9a.

38. 发明专利

JPH09228985A ENERGY SAVING PUMPING PLANT 失效
公开(公告)号：JPH09228985A
公开(公告)日：1997-09-02
申请号：JP3334796
申请日：1996-02-21
申请人： HITACHI LTD
发明人： ARAI YUSUKE , MATSUI SHIRO , NAGASAWA SHIGENOBU
IPC分类号： F04D27/00 , F04D25/02
摘要： PROBLEM TO BE SOLVED: To save energy by using a gas turbine as driving facility, providing a pump which is driven through a power transmission device of a transmission, and driving a generator through the power transmission device of the transmission to use power generated in this way as electricity for control when there is excess power. SOLUTION: When a pump 10 is driven through a transmission 7 by using a gas turbine 1 as power, a generator 8 generates power in the same way. A transmission 7 inputs power from an output shaft of the gas turbine 1 into a shaft joint 6 and an input shaft 2 of the transmission 7 and transmits power from a gear 5 to an output shaft 3 driven by the pump 10 and an output shaft 4 which drives the generator 8. When load applied on the gas turbine 1 when the operation of the pump 10 is started and stopped is large, a clutch 9 provided on the output shaft 4 is turned off to stop the transmission of power to the generator 8. On the other hand, at the time of normal operation, the clutch 9 is turned on to transmit power to the generator and generate power because load applied on the gas turbine 1 is small.

39. 发明专利

JPH08284880A SHAFT SEALING DEVICE OF VERTICAL SHAFT PUMP 失效
公开(公告)号：JPH08284880A
公开(公告)日：1996-10-29
申请号：JP8534295
申请日：1995-04-11
申请人： HITACHI LTD
发明人： ARAI YUSUKE , NAGASAWA SHIGENOBU , AIZAWA KOJI , CHIBA YOSHIAKI
IPC分类号： F04D29/08
摘要： PURPOSE: To provide a shaft sealing device with no need of any external feed water and capable of using a pumping solution as lubricating water and doing air operation stably for long period and repeatedly, especially, to secure a stable sliding characteristic by preventing the penetration or stacking of earth and sand in a rotary container. CONSTITUTION: This shaft sealing device for a vertical shaft pump is equipped with a seat ring 4 housed in a case 3 clamped to a flange 2 on the circumference of a main shaft 1, a seal case 6 installed at the side of a pump casing 7, a seal ring 5 housed in the case 3 clamped to this seal case 6, a coil spring 10 pressing this seal ring 5 to the seat ring 4, and a rotary container 11 clamped to the flange 2 so as to surround each outer boundary side of the case 3 and the seal case 6, respectively. In this constitution, a pumping path 14a, a clearance between an inner wall of the pump casing 7 and an outer wall of the rotary container 11, is formed into such a sectional area A as delaying the flow velocity of sediment grain passing through this pumping path and making them flow down to the outside of this shaft sealing device.

40. 发明专利

JPH0820993A IN-FLOW FACILITY 失效
公开(公告)号：JPH0820993A
公开(公告)日：1996-01-23
申请号：JP15348894
申请日：1994-07-05
申请人： HITACHI LTD
发明人： ARAI YUSUKE , NAGASAWA SHIGENOBU , HATSUDA TOSHIO , TAKADA KUNIO
IPC分类号： E02B9/04 , E03F1/00 , E03F5/22
摘要： PURPOSE:To make it possible to prevent screenings from being penetrated into an underground flood-way from a shaft and control the amount of in-flow into the shaft in a part of in-flow facility of large depth underground drainage facility. CONSTITUTION:A shaft intake wall 6, a cover 4, which covers the wall and a rack 5 are installed to an in take of a shaft where an opening lower end of the cover 4 is designed to be a minimum water level and below, and what is more, the cover 4 and the support rack 5 are adapted to be vertically movable in mechanism. This construction makes it possible to remove screenings only by setting up the cover 4, which is simple, and what is more, to control the amount of in-flow in the shaft even when no prior art dust cleaner is installed.

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