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1. 发明专利

JPH01317662A MOLTEN STEEL POURING NOZZLE FOR BELT TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH01317662A
公开(公告)日：1989-12-22
申请号：JP14978788
申请日：1988-06-17
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： NAKAMURA SHOZO , INOUE TOMOAKI , MATSUSHIMA TOKUNORI , CHIBA YOSHIAKI , KIMURA TOMOAKI , MORIWAKI SABURO , YOSHIDA HISASHI
IPC分类号： B22D11/06 , B22D11/10
摘要： PURPOSE:To prevent the development of solidified shell by joining molten steel in a tundish poured through a molten steel discharging hole of an inner tube and molten steel in a mold sucked through a molten steel sucking hole of an outer tube at the inner part of the outer tube and flowing the molten metal into the molten from a discharging hole of the outer tube. CONSTITUTION:In the double tube nozzle 10, the molten steel in the tundish 1 is flowed into the inner tube 12 and the molten steel in the mold, which is out of the outer tube 11, is sucked from the molten steel sucking hole 13 with kinetic energy of the molten steel flowed through the molten steel discharging hole 15 of the inner tube 12. Jet pump action flowed into the mold toward the short wall 5 side through the molten steel discharging hole 14 of the outer tube 11 by joining with the molten steel from the inner tube 12, is generated and the forced convection is developed to the molten steel in the mold. By this method, the molten steel flowing velocity at the fixed short wall curving part can be made high and also the flowing velocity at the molten steel surface near the nozzle 10 is made high to eliminate stagnation of the molten steel. Further, the development of the solidified shells at the short wall curving part and the outer surface of the nozzle is prevented and the occurrence of breakout and the surface crack at the long wall side in the mold can be prevented.

2. 发明专利

JPH038540A SHORT SIDE FIXED MOLD IN BELT TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH038540A
公开(公告)日：1991-01-16
申请号：JP14239289
申请日：1989-06-05
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： NAKAMURA SHOZO , MATSUSHIMA TOKUNORI , ISHIBASHI KOJI , INOUE TOMOAKI , CHIBA YOSHIAKI , KIMURA TOMOAKI , MORIWAKI SABURO
IPC分类号： B22D11/06
摘要： PURPOSE:To make contacting load working between a belt and short side little and to reduce wear of the short side and sliding flaw on the belt by forming shape of the short side fixed mold to trapezoid shape, which the short side face at molten metal side is longer than the short side face at the reverse side, in the cross sectional face thereof. CONSTITUTION:The short side fixed mold 20 forms the trapezoid shape having the length of the face 20a at the molten steel 16 side is longer than the length of the face 20b at the air side in the cross sectional face shape. A flowing passage of the high pressure water formed with the belt 4 contacting with the short side 20 and cooling pad, is made to divergent shape toward reverse molten steel side from the molten steel side. As both of the belt 4 and the short side 20 are in contact with both sides, the contacting surface load is made to little as compared with the case of contacting with only the ordinary both sides of the short side, and the wear of the short side and the sliding flaw of the belt are reduced.

3. 发明专利

JPH02155543A APPARATUS FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH02155543A
公开(公告)日：1990-06-14
申请号：JP30997988
申请日：1988-12-09
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： MATSUSHIMA TOKUNORI , NAKAMURA SHOZO , INOUE TOMOAKI , CHIBA YOSHIAKI , KIMURA TOMOAKI , MORIWAKI SABURO
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of solidified shell in a short wall side curving part and to prevent breakout and surface crack in long wall side of a cast slab by controlling impressed power quantity into high frequency heating coil arranged along refractory of the fixed short wall side. CONSTITUTION:The heating coil 13 is connected with a high frequency generator 14 and the high frequency generator 14 controls the impressed power quantity into the heating coil with signal from an output setter 15 or an output control unit 16 so as to remelt the solidified shell developing at the curving part in the short wall side or so that the solidified shell does not develope. The output control unit 16 works by signal from a solidified shell predicting computing element for predicting-calculating size, developing or disappear phenomena of the solidified shell developing at the curving part in this short wall side through the signal from plural pieces of the temp. detectors 18, 19, 20 arranged in refractory 9.

4. 发明专利

JPH02165847A CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH02165847A
公开(公告)日：1990-06-26
申请号：JP31829688
申请日：1988-12-16
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： INOUE TOMOAKI , CHIBA YOSHIAKI , NAKAMURA SHOZO , MATSUSHIMA TOKUNORI , KIMURA TOMOAKI , MORIWAKI SABURO
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of breakout, etc., caused by solidified shell developing on a short side member by setting exciting device between refractory and cooling member surrounding the refractory being the tapered short side members downward constituting both end sides of a mold. CONSTITUTION:Into the mold constituted of one pair of the cooling belts 4 and the tapered downward short side members 5 at both ends, the molten steel 2 is supplied from a tundish 1 through a nozzle 3, cooled and solidified with the cooling pads 6 supporting and cooling the cooling belts 4 to obtain the cast slab. In the above continuous casting apparatus, the short side member 5 is constituted of the refractory 9 having tapered shape downward and excellent heat insulation and cooling member 10 surrounding the refractory 9 except at least inner face of the mold. Further, the exciting device 11 of actuator, etc., composed of piezoelectric element is arranged at between the above refractory 9 and cooling member 10. By this method, the solidified shell developed on the short side member 5 is separated from the solidified shell on the cooling belt 4 and the developments of the breakout and double skin caused by crack of the solidified shell are prevented.

5. 发明专利

JPH09324737A SHAFT SEALER OF HYDRAULIC MACHINE 失效
公开(公告)号：JPH09324737A
公开(公告)日：1997-12-16
申请号：JP14546596
申请日：1996-06-07
申请人： HITACHI LTD
发明人： AIZAWA KOJI , CHIBA YOSHIAKI , ARAI YUSUKE , NAGASAWA SHIGENOBU
IPC分类号： F03B11/00 , F16J15/34
摘要： PROBLEM TO BE SOLVED: To provide the following property and sealing performance of a seal case stabilized to the use for a long period by providing such a means as preventing foreign matters from invading a gap formed on the outer peripheral side of a seal case, by the upper part of an O ring and the inner peripheral side of a cover and holding lubricant water therein. SOLUTION: In a sealing device, a case 5b in which a seat ring 7 is stored and fixed is fixed on the upper surface of flange 8 fixed to a spindle 1 and a seal ring 6 is pressed on this seat ring 7. On the other hand, the seal ring 6 is stored and fixed to a case 5a so that the seal ring 6 may be attached to/detached from the seal case 4. And a pump casing 12a provided with a cover 11 for surrounding the spindle 1 and flange 8 is attached so as to seal a gap between the seal case 4 and the cover 11 and the seal ring 6 is pressed on the seat ring 7 by means of a coil spring 2. By means of such a constitution, foreign matters are prevented from invading a gap formed between the upper part of a O ring 3 and the inner peripheral side of the cover 11 on the outer peripheral side of the seal case 4.

6. 发明专利

JPH0972428A SHAFT SEALING DEVICE FOR VERTICAL-SHAFT PUMP 失效
公开(公告)号：JPH0972428A
公开(公告)日：1997-03-18
申请号：JP22616695
申请日：1995-09-04
申请人： HITACHI LTD
发明人： ARAI YUSUKE , NAGASAWA SHIGENOBU , AIZAWA KOJI , CHIBA YOSHIAKI
IPC分类号： F16J15/34 , F04D13/00 , F04D29/04 , F04D29/046
摘要： PROBLEM TO BE SOLVED: To stably maintain water lubrication for a sliding surface during gas driving of a shaft sealing device for a long time. SOLUTION: A return water passage 14 is formed in a return plate 12 for covering the upper edge opening of a rotary cylinder 11 attached to a main spindle 1 for forming a lubricating water holding chamber 11a erected so as to surround the outer periphery of a seat ring 4 and a sealing ring 5 and lubricating water to be leaked is returned by the pumping action of the return water passage 14.

7. 发明专利

JPH07286672A SHAFT SEALING DEVICE 失效
公开(公告)号：JPH07286672A
公开(公告)日：1995-10-31
申请号：JP7836094
申请日：1994-04-18
申请人： HITACHI LTD
发明人： CHIBA YOSHIAKI , AIZAWA KOJI , NAGASAWA SHIGENOBU , ARAI YUSUKE
IPC分类号： F04D29/08 , F16J15/34
摘要： PURPOSE:To carry out stable aerial operation for a long time and to dispense with maintenance in an end face type shaft sealing device used for a rainwater drain pump or the like operated in the air by providing a means which rolls in sealing fluid by means of a rotary ring and feeds it to a sliding face. CONSTITUTION:A rotary ring 8 is fixed in a rotary flange 9 integrated with a rotary shaft 1, and a blade 10 and a through hole 11... are arranged in the inside of the rotary ring 8. A circumferential groove is arranged on the sliding face of the blade 10, and the through hole 11 is arranged on the circumferential groove. On the other hand, a fixed ring 7 fixed in a fixed flange 5 via a secondary seal 4 and an elastic body 6 is arranged in a casing 3 while pressed against the rotary ring 8. Air inside the casing 3 is entrained by means of the blade 10 arranged in the rotary ring 8 so as to be led to the sliding face, and consequently, the rotary ring 8 and the fixed ring 7 are cooled. The sliding face of the rotary ring 8 is formed of a coating made of silicon carbide or the like, while the sliding face of the fixed ring 7 is formed of a coating made of tungsten carbide group cemented carbide or the like.

8. 发明专利

JPH01153878A GAS GOVERNOR DEVICE AND GAS PIPING SYSTEM 失效
公开(公告)号：JPH01153878A
公开(公告)日：1989-06-16
申请号：JP30963187
申请日：1987-12-09
申请人： HITACHI LTD
发明人： INOUE TOMOAKI , CHIBA YOSHIAKI , KAWAIKE KAZUHIKO , WATABIKI MASAYUKI , SONODA SHINJI
IPC分类号： G05D16/00 , F16K27/02 , G05D7/06 , G05D16/20
摘要： PURPOSE:To facilitate maintenance and inspection by removably providing an inner casing having a valve seat on an outer casing fixed to piping. CONSTITUTION:A nearly L-shaped governor outer casing 1 is fixed to a primary side pipe 1a and a secondary side pipe 1b by means of flanges 2a, 2b. The governor outer casing 1 has an opening portion 3 on the upper part thereof and a governor inner casing 4 is removably installed through the opening portion 3, forming a double structure in which the inner casing 4 and the outer casing 1 are closely attached. A guide shaft 14 is installed on the tip of a valve body 12 and guided by a guide bearing 16, and fluid pressure is controlled between the valve body 12 and a valve seat 17 fixed to the governor inner casing 4.

9. 发明专利

JPH10205526A SHAFT SEALING DEVICE AND DRAINAGE PUMP WITH THE SAME 失效
公开(公告)号：JPH10205526A
公开(公告)日：1998-08-04
申请号：JP992197
申请日：1997-01-23
申请人： HITACHI LTD
发明人： AIZAWA KOJI , CHIBA YOSHIAKI , ARAI YUSUKE , AKIBA HIDEKI
IPC分类号： F16C17/02 , F16C33/12 , F16C33/74 , F16N27/02
摘要： PROBLEM TO BE SOLVED: To provide a shaft sealing device of a pump which reduces an amount of water leak and can stably repeatedly operate a pump in the air without supplying lubricating water for a sealing member from the outside of the pump. SOLUTION: In a shaft sealing device provided with 2-1 rotating main shaft 1 having a sleeve 2 fixed on the surface thereof, a seal case 6 arranged on the outer periphery of the sleeve 2 at predetermined intervals in the radial direction, a segment sealing member 4 interposed between the seal case 6 and the sleeve 2 and divided into a plurality of parts in the peripheral direction, wherein the inner peripheral side of the seal member slides on the sleeve 2 of the rotating main shaft 1 to seal the shaft, at least the surface of the sleeve 2 is formed of super alloy member impregnated with ethylene tetrafluoride resin and the segment sealing member 4 is formed of ceramics and the sliding surface of the sealing member 4 is shaped like an arc eccentric to the sliding surface of the sleeve 2.

10. 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.

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