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121. 发明专利

JPH04304930A METHOD AND DEVICE FOR MANUFACTURING ADHESIVE TYPE LAMINATING HEAT EXCHANGER 失效
公开(公告)号：JPH04304930A
公开(公告)日：1992-10-28
申请号：JP6602691
申请日：1991-03-29
申请人： HITACHI LTD
发明人： UEDA HIRONOBU , HARADA SUSUMU , MATSUMOTO KOZO
IPC分类号： B23K3/00 , B23P15/26 , B29C65/48 , B32B3/20 , B32B5/18 , C22C19/03 , F28F3/00
摘要： PURPOSE:To easily apply wholly uniform pressure by means of the recovery force of the shape memory alloy so as to improve the reliability at the adhesion time by installing shape memory alloy and a lamination body laminating a heat transmission plate and a spacer in the elongation direction of the alloy in a restraining jig, and subjecting them to heating. CONSTITUTION:A pressurized body that a coil spring 5 is made zero at its spring interval and a lamination body 4 are installed inside a restraining jig 7. On the other hand, a heating source 8 is set up on the circumference of the restraining jig 7. The adhesive of a spacer 2 is melted by rising the temperature of the laminating body 4 and coil spring 5 by the heating source 8. At this time the lamination body 4 is contracted by the thickness part of the adhesive. On the one hand, the coil spring 5 made of the shape memory alloy is elongated by the displacement quantity. Therefore the coil spring 5 applies a uniform pressure to the lamination body 4. Consequently pressure can be applied completely and uniformly by the recovery force of the coil spring 5, even in the case of these being dispersion in the lamination interval of the lamination body 4 and there being the inclination of a nonadhesive body.

122. 发明专利

JPH04155160A PRESSURE-REDUCING DEVICE FOR LIQUID HELIUM 失效
公开(公告)号：JPH04155160A
公开(公告)日：1992-05-28
申请号：JP27632990
申请日：1990-10-17
申请人： HITACHI LTD
发明人： HARADA SUSUMU , UEDA HIRONOBU , MATSUMOTO KOZO , OKAMOTO KAZUO
IPC分类号： F25B9/02
摘要： PURPOSE:To prevent the entrainment of liquefied helium on the suction side of a pressure-reducing pump, by a method wherein for vaporized helium gas, a baffle plate is provided at the outlet of a liquid helium reserver. CONSTITUTION:Herium gas in low temperature and high pressure, which is fully cooled in a herium-refrigerating machine 1, passes a liquefing line 2 and expands through a valve 3 for Joule-Thomson cooling effect. After that, a part thereof is turned into liquefied helium, is decelerated through a divergent pipe 4 and is stored as liquid helium 5. On the other hand, helium gas evaporated by the heat load of a superconductive magnet 7 placed in a liquid helium reserver 6, passes a cylindrical baffle plate 8, is properly compressed by a pressure-reducing pump 9 and is returned to the suction side of the helium-refrigerating machine 1. When a liquid level is low in the time of the supply of the liquid helium, the helium gas in low temperature entrains the liquefied helium and they are scattered. In this case, since a divergent pipe 4 is provided at the outlet part of the liquefying line 2, the liquefied helium is not directly entrained on the suction side of the pressure-reducing pump 9. In the case where the liquid helium is sufficiently exists, since the liquefied helium is interrupted by the baffle plate 8, such a matter as the liquefied helium directly enters the suction side of the pressure-reducing pump 9 does not occur.

123. 发明专利

JPH04153502A EXPANSION TURBINE PROTECTOR 失效
公开(公告)号：JPH04153502A
公开(公告)日：1992-05-27
申请号：JP27633190
申请日：1990-10-17
申请人： HITACHI LTD
发明人： OKAMOTO KAZUO , KITA OSAMU , MATSUMOTO KOZO , TOBITAKA TOSHIO
IPC分类号： F01D21/00
摘要： PURPOSE:To prevent any damage on an expansion turbine even if a tachometer system becomes deficient by providing a controller capable of outputting abnormality of a tachometer so as to keep a turbine inlet valve to be fully closed or to be kept open at a specified minimum opening degree. CONSTITUTION:An expansion turbine wheel 1 is connected to a rotary shaft 2, a speed reducer 3 and a generator 4. Even if an indication value of a tachometer 10 is a specific value (e.g. 0rpm) or lower, the value is regarded as a fault indication value by the tachometer when a differential pressure P1-P2 between pressure indicators 7, 11 disposed in an inlet and outlet of a turbine, respectively, exceeds the specific value, an indication value of a turbine processing gas flowmeter 8 exceeds the specific value, or a shaft vibration value exceeds the specific value. Accordingly, a turbine inlet valve 5 is fully closed, or a variable nozzle mechanism 6 is opened at a minimum specified opening degree. Therefore, the expansion turbine, which is controlled by the tachometer, can be stopped or rotated at a low speed without being rotated at an over-speed even if a tachometer system becomes deficient.

124. 发明专利

JPH0417343B2 失效
公开(公告)号：JPH0417343B2
公开(公告)日：1992-03-25
申请号：JP21244785
申请日：1985-09-27
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , KAJIWARA HIROTAKE , KAWAMURA SHIGETO
IPC分类号： F25D13/00 , F25B9/02

125. 发明专利

JPH0480559A HELIUM REFRIGERATING EQUIPMENT 失效
公开(公告)号：JPH0480559A
公开(公告)日：1992-03-13
申请号：JP19300390
申请日：1990-07-23
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , KAWAMURA SHIGETO
IPC分类号： F25B9/02
摘要： NEW MATERIAL:To improve energy efficiency and execute stable operation by a method wherein a supercritical expansion turbine is mounted in the liquefying line of a cold box, and high pressure helium branched from a supercritical expansion turbine inlet or the upper stream side thereof is cooled by a heat exchanger on the downstream side (on the cold end side) of a branched temperature level, and fed to a supercritical helium loop. CONSTITUTION:After helium branched to a liquefying line is cooled by means of third - sixth heat exchangers 11c - 11f, most of helium flows through a supercritical expansion turbine inlet valve 14 and is introduced to a supercritical expansion turbine 15. The helium is heat-insulated and expanded to approximate 4 atm by means of the supercritical expansion turbine 15 to reduce temperature and enters a seventh heat exchanger 11g. Helium of approximate 4 atm flowing out from the seventh heat exchanger 11g is finally heat-insulated and expanded to an approximate atmospheric pressure by means of a JT valve 16, a part of them produces liquid helium and is fed through a first very low temperature refrigerant transfer pipe 17a to a liquid helium container 18. Liquid helium in the liquid helium container 18 is fed through a second very low temperature refrigerant transfer pipe 17b to a supercritical helium circulating device 20.

126. 发明专利

JPH0480558A HELIUM LIQUEFYING REFRIGERATOR 失效
公开(公告)号：JPH0480558A
公开(公告)日：1992-03-13
申请号：JP19300290
申请日：1990-07-23
申请人： HITACHI LTD
发明人： KAWAMURA SHIGETO , MATSUMOTO KOZO
IPC分类号： F25B9/00 , F25B9/02
摘要： PURPOSE:To enable coping with change for a complete operation mode by a method wherein a method to generate cold on the temperature side higher than a liquid nitrogen temperature level includes two kinds of the one being a method by liquid nitrogen and the other being a method by a high temperature expansion turbine. CONSTITUTION:In an operation mode to demand the generation of quantities of cold like liquefying operation, a liquid nitrogen heat exchanger 8 is worked in addition to the generation of cold by means of a high temperature expansion turbine 16 and a cold generating amount is increased. Namely, a part of middle pressure gas entering a cold box 5 is branched and is heat-exchanged with liquid nitrogen by a liquid nitrogen heat exchanger 8, and helium gas of a liquid nitrogen temperature level is joined with a main middle pressure line through an absorber 9. This method increases a cold generating amount of a liquid nitrogen temperature level or more. In normal operation, when the high temperature expansion turbine 16 is stopped due to failure in operation, the liquid nitrogen heat exchanger 8 is worked as backup thereof, Further, when, in initial stage cooling operation, gas of a liquid nitrogen temperature level or more is used, all expansion turbines 16 and 17 are all stopped, and the liquid nitrogen heat exchanger 8 is worked to effect initial cooling.

127. 发明专利

JPH0473554A CRYOGENIC FREEZER DEVICE 失效
公开(公告)号：JPH0473554A
公开(公告)日：1992-03-09
申请号：JP18395590
申请日：1990-07-13
申请人： HITACHI LTD
发明人： HARADA SUSUMU , UEDA HIRONOBU , OKAMOTO KAZUO , MATSUMOTO KOZO
IPC分类号： F25B9/02 , F25B9/06
摘要： PURPOSE:To provide a cryogenic freezer having a high reliability capable of continuing an operation even if a two-phase flow turbine is troubled by a method wherein a single-phase flow turbine and a two-phase flow turbine are arranged in series and a helium gas bypassing flow passage is arranged in parallel with the two-phase flow turbine. CONSTITUTION:High pressure helium gas passes through a high pressure line 3 of a heat exchanger 2 disposed at the lower-most part of a helium freezer 1, its pressure is adjusted by an inlet valve 4, thereafter it is adiabatically expanded by an ultra-critical helium expansion turbine (a single-phase flow turbine) 5, passes through an inlet valve 6 of a two-phase flow turbine 7, it is adiabatically expanded by the two-phase flow turbine, resulting in producing gas-liquid two-phase flow of helium gas and liquid helium. After this operation, liquid helium is gasified by a thermal load 11 to become a single-phase gas, it passes through a low pressure line 12 and returns to a helium freezer 1. In the event that the two-phase flow turbine 7 can not be operated due to a certain trouble, the inlet valve 6 and an outlet valve 8 of the two-phase flow turbine 7 are immediately closed and then a Joule-Thomson expansion valve 10 disposed in a bypassing line 9 is opened.

128. 发明专利

JPH03247965A HELIUM REFRIGERATING PLANT 失效
公开(公告)号：JPH03247965A
公开(公告)日：1991-11-06
申请号：JP4245590
申请日：1990-02-26
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , KAJIWARA HIROTAKE
IPC分类号： F25B9/06 , F25B9/02
摘要： PURPOSE:To obtain a simple helium refrigerating plant consisting of a device without any auxiliary cold source by a method wherein helium gas is introduced into a first expander at temperature higher than liquid nitrogen, and outlet gas of the first expander is introduced into a second and a third expander, and then into a low pressure line, and returned to intake side of a compressor. CONSTITUTION:Helium gas compressed by a compressor is introduced into a cold box 10 through a high pressure line 3. After cooled by a first heat exchanger 11a, the helium gas is partly introduced into an expansion turbine 14a through an inlet valve 12 of the turbine 14a to have a temperature of the liquid nitrogen temperature level (80K) or above, and generates cold by adiabatic expansion. Next, the helium gas is introduced into a second expansion turbine 14b and a third expansion turbine 14c successively through a third heat exchanger 11c and a fifth heat exchanger 11e respectively. The helium gas expanded by the third expansion turbine 14c down to low pressure joins a low pressure line 4. Then the helium gas, the cold of which is collected by sixth to first heat exchangers 11f to 11a, is returned to the compressor 1.

129. 发明专利

JPH03217765A CRYOGENIC REFRIGERATOR USING EXPANSION TURBINE 失效
公开(公告)号：JPH03217765A
公开(公告)日：1991-09-25
申请号：JP1256690
申请日：1990-01-24
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： MATSUMOTO KOZO , OKAMOTO KAZUO , KAJIWARA HIROTAKE , HIROTA KATSUHIKO
IPC分类号： F25B9/06 , F25B9/02
摘要： PURPOSE:To prevent an excess load variation of a turbine even at the time of an erroneous manipulation, or an erroneous operation by attaching slow opening/closing means to an expansion turbine inlet valve or an expansion turbine outlet valve or attaching it to both. CONSTITUTION:After high pressure helium introduced to a cold box 10 via a high pressure line 1 is cooled by a first heat exchanger 11a, it is partly introduced to a first expansion turbine 13a through an expansion turbine inlet valve 12a with a first quick opening preventing mechanism, adiabatically expanded to generate cold, cooled by a third heat exchanger 11c, adiabatically expanded to a low pressure by a second expansion turbine 13b, and combined with a low pressure line 2. After the residual helium is cooled by second-fifth heat exchangers 11b-11e, it is adiabatically expanded by a third expansion turbine 13c through an expansion turbine inlet valve 12b with a second quick opening preventing mechanism to generate cold, then cooled by a sixth heat exchanger 11f, expanded to a low pressure by an expansion turbine outlet valve 14 with a quick opening and quick closing preventing mechanism to absorb heat load of a cold load 20, and returned to a compressor. According to this, an excess load variation to the expansion turbine is prevented even at the time of an erroneous manipulation or an erroneous operation.

130. 发明专利

JPH0350950B2 失效
公开(公告)号：JPH0350950B2
公开(公告)日：1991-08-05
申请号：JP22860885
申请日：1985-10-16
申请人： HITACHI LTD
发明人： MATSUMOTO KOZO , TAKEI NOBUYUKI
IPC分类号： F25D3/10 , F25B9/00 , F25B9/02

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