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71. 发明专利

JPH07150621A SEWAGE PUMP SYSTEM AND CONTROLLING METHOD THEREOF 失效
公开(公告)号：JPH07150621A
公开(公告)日：1995-06-13
申请号：JP29953593
申请日：1993-11-30
申请人： HITACHI LTD
发明人： ANZAI YOSHIRO , YAMADA MASAYUKI , SUZUKI ISAO
IPC分类号： E03F5/22 , F04D13/16 , F04D15/00
摘要： PURPOSE:To facilitate maintenance and inspection by dividing a storing tank into a sewage storing tank storing sewage and a dry pit section capable of separating a pump from sewage to place. CONSTITUTION:When the water level in a sewage storing tank 2 reaches the drainage starting water level, it is detected by a water level detector 3 to start a pump 5, and sewage is pressurized and is discharged. When sewage in the storing tank 2 is discharged to lower the water level to the height to which an inlet pipe 18 is connected, the pump 5 is stopped to stop drainage. When the maintenance and inspection of the pump 5, etc., are made, the pump 5 is pulled out by an automatic detachable device 11, a slide O ring 12, a guide pipe 20 and a lifting chain to perform the maintenance and inspection. When sewage is flowed into in excess of drainage capacity of the pump 5 or when the pump 5 is stopped, and when pressure in the storing tank 2 is in excess of constant value, a pressure faucet 16 is opened, and a dry pit section 8A is used as the storing tank.

72. 发明专利

JPH06147328A SHAFT SEALING DEVICE AND DRAINAGE PUMP 失效
公开(公告)号：JPH06147328A
公开(公告)日：1994-05-27
申请号：JP30078992
申请日：1992-11-11
申请人： HITACHI LTD
发明人： CHIBA YOSHIAKI , AIZAWA KOJI , ARAI KATSUTOSHI , YAMADA MASAYUKI
IPC分类号： F04B39/00 , F16J15/34
摘要： PURPOSE:To decrease surface pressure and to enable air operation to be conducted for a long period without injecting lubricating water from a pump outside portion by supporting at least one casing for holding a sliding member fixed to a rotary shaft by means of a surface pressure adjusting member and a spring. CONSTITUTION:In a vertical shaft pump like a rainwater drainage pump in which air operation is performed, a spring member 8 is fixed in a holder 6 fixed to a rotary shaft 1, and a seal case 5 wherein a seal ring 3b is fixed is attached on the upper part of the spring member 8, so as to be energized upward by the spring member 8. A surface pressure adjusting member 4 made of materials whose coefficient of thermal expansion is large, and attached to the rotary shaft 1 is attached on the upper part of the seal case 5, so as to be axially moved freely in a state where the seal case 5 is pinched between the spring member 7 and the surface pressure adjusting member 4. Moreover a fixed side seal ring 3a is fixed and arranged to a housing 2 so as to be faced to the upper part of the seal ring 3b, so that a shaft sealing device is constituted by enclosing the whole by casings 10a, 10b.

73. 发明专利

JPH05321871A BEARING DEVICE FOR VERTICAL SHAFT PUMP AND BEARING DEVICE DISASSEMBLY/ASSEMBLY METHOD 失效
公开(公告)号：JPH05321871A
公开(公告)日：1993-12-07
申请号：JP12734992
申请日：1992-05-20
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI , YAZAWA SETSUO , SAKAMOTO WAICHI , OTANI KENJI
IPC分类号： F04D13/00 , F04D29/04 , F04D29/046 , F04D29/60
摘要： PURPOSE:To provide a bearing device by which a control operation or a precedence standby operation becomes possible by means of an idle operation by carrying out maintenance work on a bearing without pulling up a pump body in a vertical shaft pump whose impeller is arranged in a pump water supply tank. CONSTITUTION:A bearing device 5 of a vertical shaft pump is arranged below an impeller 1, and is arranged in a suction casing. Since a bearing 5 is formed in such a structure as being pulled out downward wholly, maintenance can be carried out inside of a center cone 6. Since the center cone 6 is formed in a watertight structure, it can play a roll of a water storage tank, and can keep a condition that water always exists around the bearing 5. Thereby, since the bearing is formed in such a structure as being pulled out downward wholly, the maintenance can be carried out without pulling up the pump. Since the water always exists around the bearing, a control operation or a precedence standby operation becomes possible by means of an idle operation.

74. 发明专利

JPH0533800A PUMP FEED WATER TANK DEVICE 失效
公开(公告)号：JPH0533800A
公开(公告)日：1993-02-09
申请号：JP19165591
申请日：1991-07-31
申请人： HITACHI LTD
发明人： MATSUI SHIRO , OTANI KENJI , YAMADA MASAYUKI
IPC分类号： F04D29/66
摘要： PURPOSE:To realize highly reliable lead-stand by drive in a vertical shaft pump by furnishing a pump feed water tank device which controls generation of an air-entraining vortex sucked into the pump and can drive the pump down to a lower water level in a closed type feed water tank constituting a pump feed water passage. CONSTITUTION:A step part 8 is provided on the upper face 7 of a feed water tank, and a vent pipe 9 to communicate this step part 8 and the air through to each other is provided. Additionally, the lower edge of the step part 8 is positioned at a water level peculiar to the pump which intakes an air-entraining vortex from the free surface at the lower water level or below, and an intake pipe 10 open to a level equal to or lower than the lower edge of the step part 8 and communicated through to a flow passage on the inlet side of a vertical shaft pump.

75. 发明专利

JPH04159492A ALL-WATER LEVEL OPERATION PUMP 失效
公开(公告)号：JPH04159492A
公开(公告)日：1992-06-02
申请号：JP27903490
申请日：1990-10-19
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI
IPC分类号： F04D15/00 , F04D13/00
摘要： PURPOSE:To control an air suction amount and further to adjust a delivery amount in accordance with a water level so as to contrive an efficient drainage and reduction of vibration by providing a water level meter, suction air pipe, adjusting valve and a controller as an intake air amount control device. CONSTITUTION:One end of a suction air pipe 4 is mounted to a suction bell 1 below an impeller further to provide a control valve 8 in the other end. On the other hand, a water level meter 6 is provided in a suction water tank to always feed a signal of detected water level to a controller 7. A relation between the water level and a suction air amount is input to the controller 7 thus to indicate an optimum opening of the control valve 8 in accordance with the water level. In this way, an effective drainage and reduction of vibration are attained by changing resistance of the suction air pipe to control a suction air amount and by adjusting a delivery amount in accordance with the water level. In a region of unstable suction air amount in the vicinity of starting suction of air, the control valve 8 is throttled so as to prevent a large amount of air from being sucked, and the reduction of vibration in the vicinity of the water level in starting air suction is attained.

76. 发明专利

JPH04103895A VERTICAL SHAFT PUMP 失效
公开(公告)号：JPH04103895A
公开(公告)日：1992-04-06
申请号：JP22132690
申请日：1990-08-24
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI , SAKAMOTO WAICHI
IPC分类号： F04D13/00 , F04D29/44 , F04D29/66
摘要： PURPOSE:To suppress a vibration generated in a suction operation in which a water discharge operation is carried out while making an air suction, by providing dampers acting as a resistance to the water in a water suction tank to a pump casing positioned at the lower side than a suction port. CONSTITUTION:A suction port 5 linked to a suction pipe 6 is provided near the lower side of an impeller 1. And plural dampers are installed to a bell-mouth 3 positioned at the lower side from near the suction port 5. In this case, when the water level is lowered from the lowest water level (LWL), the air is started to absorb from the suction port 5, and a suction air operation condition that a mixture of the water and the air flows in to the impeller 1 is generated. In this case, the dampers 7 sunk under the water even at the LWL act as a resistance to the water, making the role of a damping member, and a damping effect is generated. As a result, even through an unbalance owing to the suction operation is increased a little, the vibration can be suppressed.

77. 发明专利

JPH03266181A CHARACTER IMAGE SYNTHESIZING SYSTEM 失效
公开(公告)号：JPH03266181A
公开(公告)日：1991-11-27
申请号：JP6635590
申请日：1990-03-16
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI
IPC分类号： B41B19/00 , B41B27/00 , G06T11/60 , G09G5/26
摘要： PURPOSE:To perform synthesis by easily and precisely matching the size and arrangement of the image of an input character by deciding either the size and the position relation of the input character setting either the size and the position relation of an existing character image in image data as reference. CONSTITUTION:Fine adjustment is applied so as to match the size, etc., of an input character frame 22 displayed on the screen of a display part 15 with an existing character M, and a character synthesis processing part 10 and an image processor 12 perform desired processing such as the magnification/ reduction of the input character (m) by an operator precisely based on the size of the character frame 22a of the character input frame 22, and the values of an inter-character gap 22b and an inter-row gap 22c. Thereby, it is possible to precisely and easily perform the synthesis of the input character (m) matched with the existing character M, for example, without preparing a large number of character fonts with different size even when the various kinds of size of the existing character M and character gaps/row gaps exist.

78. 发明专利

JPH03140626A CERAMIC BEARING DEVICE 失效
公开(公告)号：JPH03140626A
公开(公告)日：1991-06-14
申请号：JP27846789
申请日：1989-10-27
申请人： HITACHI LTD
发明人： MATSUI SHIRO , OTANI KENJI , YAMADA MASAYUKI , NEMOTO AKIRA
IPC分类号： F16C33/24 , F16C33/12 , F16C37/00
摘要： PURPOSE:To make the dry operation of a car for many hours possible to improve its reliability by detecting the temperature of a member near a sliding part, and supplying a refrigerant for cooling lubrication to the sliding part with the detected temperature being interlocked. CONSTITUTION:A rotary shaft 1 to which a cemented carbide sleeve 2 is fittedly fixed is slidably supported by a ceramic bearing 3 which is supported in a bearing housing 10 by a back metal 5 and an elastic body 4, and a temperature sensor 6 is provided near a sliding part. A temperature detected by the sensor 6 is inputted into a valve control device to operate a supply valve 9 according to the detected temperature for controlling the supply of a cooling-lubricating medium 8 to the sliding part. Thus the dry operation of a car can be executed for many hours, and its high reliability becomes obtainable.

79. 发明专利

JPH0278799A MOVABLE BLADE PUMP AND PERFORMANCE REGULATING METHOD OF THE SAME 失效
公开(公告)号：JPH0278799A
公开(公告)日：1990-03-19
申请号：JP22974688
申请日：1988-09-16
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI
IPC分类号： F04D29/18 , F04D29/54
摘要： PURPOSE:To enable the regulation of the pump performance by forming a recessed part on the casing liner inner circumferential surface so that the gap between the impeller vane end part and the inner circumferential surface of the casing liner is continuously changed according to the change of the blade opening degree of the impeller vane. CONSTITUTION:An impeller vane 1 is rotatably supported by stem bearings 4a, 4b fitted in an impeller hub 3. An arm 5 is fitted in the stem shaft 2 of the impeller vane 1 and connected to an operation rod 8 through a ball joint 6 and a spider 7. In this case, a casing liner 10 has a spherical inner circumference 10a formed to keep a proper gap with the top end part of the impeller vane 1. A curved surface with a radial having the center position shifted from that of the radial of the spherical surface is cut to form a recessed part 11 near the center. Hence, the gap between the impeller vane 1 top end part and the casing liner inner circumferential surface 10a is continuously changed according to the blade angle (blade opening degree) to regulate the performance so that the instability characteristic is not exhibited.

80. 发明专利

JPS62286184A SYNTHESIZING SYSTEM FOR CHARACTER PICTURE 失效
公开(公告)号：JPS62286184A
公开(公告)日：1987-12-12
申请号：JP13100386
申请日：1986-06-05
申请人： HITACHI LTD
发明人： YAMADA MASAYUKI , KUWABARA YOSHINAGA
IPC分类号： G06T11/60
摘要： PURPOSE:To synthesize the without the mis-registration of a synthesized character by recognizing synthesizing position information on picture data on the position on which the character is synthesized with the picture data and correcting the synthesizing position to position it. CONSTITUTION:A picture processor 3 obtains a synthesizing area coordinate and the inclination of a picture stored in a position information memory 5. Then, according to the size of a previously applied character synthesizing area and the size of the synthesized character, the center line 12 of the character synthesizing position of a synthesizing character area 9 is obtained. Then, the picture processor 3 performs the synthesizing positioning of a character code along the center line 12, corrects the character synthesizing position to the inclination of the picture and develops a character code pattern in a picture memory 2. Said processing is carried out until the development of all character codes is completed, and the synthesized character can be stored in the character synthesizing area 9 without the mis-registration of the synthesized character.

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