-
公开(公告)号：US4930314A
公开(公告)日：1990-06-05
申请号：US404605
申请日：1989-09-08
IPC分类号： F25B9/14
CPC分类号： F25B9/14 , F02G2253/06 , F02G2253/08
摘要： Improved Stirling cycle machine including at least a pair of eccentric disks fixed to a pair of rotatable shafts in phase with each other and which eccentric disks upon rotation of the shafts (in opposite directions in the preferred embodiment) also rotate (in opposite directions in the preferred embodiment) and impart upward movement to a bellows defining a variable-volume compression or expansion chamber with a reduced tendency to also impart side thrust, rocking motion, or lateral movement to the bellows whereby bellows wear is reduced and the life of the bellows and the Stirling cycle machine is increased.
摘要翻译： 改进的斯特林循环机包括至少一对固定在一对可转动的轴上的偏心盘，它们彼此同相，并且在轴（在优选实施例中沿相反方向）转动时，偏心盘也旋转 优选实施例），并且将向上运动赋予限定可变容积的压缩或膨胀室的波纹管，同时具有降低的倾向，从而使侧向推力，摆动运动或向波纹管的侧向运动，从而降低波纹管磨损，并且波纹管和 斯特林循环机增加。
-
公开(公告)号：US4841268A
公开(公告)日：1989-06-20
申请号：US101517
申请日：1987-09-28
CPC分类号： H01F6/065 , G01R33/3815 , G01R33/3804
摘要： A magnet system, having permanently installed power leads, for providing a magnetic field. The system includes a vacuum vessel and a cryogenic containment vessel supported within the vacuum vessel. The containment vessel holds a main coil formed of superconductive wire, along with a quantity of liquid helium to maintain the wire below its critical temperature. The power leads, which supply energy to the coil from a power supply outside the vacuum vessel, also take energy from the coil to a load resistor outside the vacuum vessel when the coil is discharged, each include an elongate metallic tube. The magnet system also includes a solenoid controlled valve which is responsive to the passage of electric current through the tubes of the power leads to cause helium gas resulting from the boiling of liquid helium in the containment vessel to be vented to atmosphere through the tube thereby cooling them.
摘要翻译： 磁体系统，永久地安装电源线，用于提供磁场。 该系统包括真空容器和支撑在真空容器内的低温容纳容器。 安全壳容纳由超导线形成的主线圈以及一定量的液氦，以将线保持在其临界温度以下。 从真空容器外部的电源向线圈供给能量的电源线，当线圈被排出时，也将能量从线圈吸收到真空容器外部的负载电阻上，每个电源都包括细长的金属管。 磁体系统还包括电磁控制阀，其响应于通过电力引线的管的电流的通过，导致由安全壳中的液氦沸腾产生的氦气通过管排出到大气中，从而冷却 他们。
-
公开(公告)号：US4680936A
公开(公告)日：1987-07-21
申请号：US813175
申请日：1985-12-24
CPC分类号： F17C3/08 , F17C3/10 , F25D3/10 , G01R33/3815 , H01F6/04 , F17C2201/0119 , F17C2203/03 , F17C2203/0687 , F17C2221/017 , F17C2221/038 , F17C2223/0161 , F17C2227/0353 , F17C2227/045
摘要： According to the present invention, improved cryogenic magnet systems for use in MRI devices are provided. These systems comprise an electromagnet immersed in a first tank containing a first liquefied gas. The first tank is located in an evacuated container that is evacuated to a high vacuum. A refrigerating system external to said evacuated container includes a second gas and a means for liquefying said second gas. A heat radiation shield means surrounding said first tank is cooled by the liquified second gas. Features of the invention include a thermal siphon for cooling the heat radiation shield and neon as the second gas.
摘要翻译： 根据本发明，提供了用于MRI装置的改进的低温磁体系统。 这些系统包括浸入包含第一液化气体的第一罐中的电磁体。 第一个罐位于抽真空至高真空的真空容器中。 所述真空容器外部的制冷系统包括第二气体和用于液化所述第二气体的装置。 围绕所述第一罐的散热屏蔽装置被液化的第二气体冷却。 本发明的特征包括用于冷却热辐射屏蔽的热虹吸和作为第二气体的氖。
-
4.发明授权
公开(公告)号：US5148137A
公开(公告)日：1992-09-15
申请号：US669804
申请日：1991-03-15
CPC分类号： B03C1/0337 , H01F6/04 , Y10S505/898
摘要： A cryogenic containment vessel for use with a pulsed superconducting magnet system includes a superconducting coil positioned within the cryogenic containment vessel for providing a magnetic field. The containment vessel includes a relatively thin metallic inner tube for holding liquid helium and the coil. The containment vessel also includes a relatively thick outer tube encompassing the inner tube with a relatively rigid insulative spacer positioned between the inner and outer tubes so that the tubes are not in contact with each other. The outer tube is predominantly metallic and has at least one joint formed of insulative material to prevent the outer tube from forming a low electrical resistance loop. The inner tube provides a vacuum seal and the outer tube provides structural support for the inner tube so that eddy current losses resulting from ramping of the current to the coil are reduced. A method of fabricating the containment vessel is also disclosed.
摘要翻译： 用于脉冲超导磁体系统的低温容纳容器包括位于低温容纳容器内的用于提供磁场的超导线圈。 安全壳包括用于保持液氦和线圈的相对薄的金属内管。 容纳容器还包括相对较厚的外管，其包围内管，其具有定位在内管和外管之间的相对刚性的绝缘间隔件，使得管不彼此接触。 外管主要是金属的，并且具有由绝缘材料形成的至少一个接头，以防止外管形成低电阻回路。 内管提供真空密封，外管为内管提供结构支撑，从而降低了电流向线圈斜坡所引起的涡流损耗。 还公开了一种制造安全壳的方法。
-
公开(公告)号：US4743880A
公开(公告)日：1988-05-10
申请号：US101518
申请日：1987-09-28
IPC分类号： A61B10/00 , A61B5/055 , G01R33/20 , G01R33/3815 , G01R33/421 , H01F7/20 , H01F7/00
CPC分类号： G01R33/3815 , G01R33/421
摘要： A magnet system for providing a localized, substantially homogeneous field for use in medical magnetic resonance imaging and its incorporation into a method of siting. The magnet system includes a vacuum vessel defining a bore for receiving the subject of the imaging and having a first end and a second end. A cryogenic containment vessel is supported within the vacuum vessel and a single coil is disposed within the containment vessel for providing the magnetic field. The magnetic system also includes a shield assembly of ferromagnetic material positioned closely adjacent the outside of the vacuum vessel and including first and second end assemblies and a plurality of axially extending beam-like members interconnecting the end assemblies. The coil comprises a winding made up of thousands of turns of small superconductive wire and which is configured to compensate for the effect of the presence of the shield to provide the substantially homogeneous field at a predetermined location in the bore. The components of the shield assembly are adapted for mounting to said vacuum vessel after siting. This permits simplified siting of the magnet system in that the vacuum vessel with the components inside of it can be sited first and the components of the shield assembly thereafter mounted on the vacuum vessel. A method of manufacturing the magnet system is also disclosed.
-
公开(公告)号：US5697220A
公开(公告)日：1997-12-16
申请号：US610381
申请日：1996-03-04
CPC分类号： F25B25/005 , H01F6/04
摘要： A refrigeration system includes a dewar and a refrigerator/liquefier which meets the variable demands of a superconducting magnet within the dewar. The system is sized to meet average loads over a defined duty cycle, and is variably operable to meed demands. In the preferred embodiment, a first supply of fluid circulates through a "condenser" element positioned in a dewar ullage to liquefy a separate supply of fluid in the dewar, and to refrigerate a pulsed cryogenic load therein, such as a superconducting magnet. A portion of the first supply of fluid may be diverted to refrigerate a second pulsed cryogenic load, such as magnet current leads permanently connected to the magnet. The dewar includes a cold gas vapor storage chamber separate from the dewar ullage, and the chamber is preferably located within the inner core of a solenoid superconducting magnet for compact and thermally efficient design. Responsive, independent adjustment of refrigeration to pulsed cryogenic loads is made possible.
摘要翻译： 制冷系统包括杜瓦瓶和冰箱/液化器，其满足杜瓦瓶内的超导磁体的可变需求。 该系统的尺寸适合于在规定的工作周期内满足平均负载，并且可变地可操作以满足需求。 在优选实施例中，第一流体供应通过位于杜瓦瓶中的“冷凝器”元件循环，以液化杜瓦瓶中的单独的液体供应，并使其中的脉冲低温负载（例如超导磁体）冷藏。 第一流体供应的一部分可以被转向以冷却第二脉冲低温负载，例如永久地连接到磁体的磁体电流引线。 杜瓦瓶包括与杜瓦瓶分离的冷气体蒸气储存室，腔室优选位于螺线管超导磁体的内芯内，用于紧凑和热效率的设计。 对脉冲低温负载进行制冷的独立调整成为可能。
-
7.发明授权Method of manufacturing a containment vessel for use with a pulsed magnet system 失效制造与脉冲磁体系统一起使用的安全壳的方法
公开(公告)号：US5237738A
公开(公告)日：1993-08-24
申请号：US805208
申请日：1991-12-10
CPC分类号： B03C1/0337 , H01F6/04 , Y10T29/49014 , Y10T29/49071
摘要： A method of manufacturing a helium containment vessel for use with a pulsed superconducting magnetic separator system is described. The containment vessel includes a superconducting coil positioned within the cryogenic containment vessel for providing a magnetic field. The containment vessel includes a relatively thin metallic inner tube for holding liquid helium and the coil. The containment vessel also includes a relatively thick outer tube encompassing the inner tube with a relatively rigid insulative spacer positioned between the inner and outer tubes so that the tubes are not in contact with each other. The outer tube is predominantly metallic and has at least one joint formed of insulative material to prevent the outer tube from forming a low electrical resistance loop.
摘要翻译： 描述了制造用于脉冲超导磁选机系统的氦容纳容器的方法。 安全壳包括位于低温容纳容器内的用于提供磁场的超导线圈。 安全壳包括用于保持液氦和线圈的相对薄的金属内管。 容纳容器还包括相对较厚的外管，其包围内管，其具有定位在内管和外管之间的相对刚性的绝缘间隔件，使得管不彼此接触。 外管主要是金属的，并且具有由绝缘材料形成的至少一个接头，以防止外管形成低电阻回路。
-
公开(公告)号：US5019247A
公开(公告)日：1991-05-28
申请号：US439422
申请日：1989-11-20
CPC分类号： B03C1/0337 , H01F6/04
摘要： A pulsed superconducting magnet system includes a vacuum vessel and a cryogenic containment vessel assembly disposed within the vacuum vessel. A superconducting coil is positioned within the cryogenic containment vessel assembly for providing a magnetic field. The vessel assembly includes a helium vessel including a relatively thin metallic inner tube for holding liquid helium and the coil. The helium vessel also includes a relatively thick outer tube encompassing the inner tube with a relatively rigid insulative spacer positioned between the inner and outer tubes so that the tubes are not in contact with each other. The outer tube is predominantly metallic and has at least one joint formed of insulative material to prevent the outer tube from forming a low electrical resistance loop. The inner tube provides a vacuum seal and the outer tube provides structural support for the inner tube so that eddy current losses resulting from ramping of the current to the coil are reduced. A method of fabricating the helium vessel is also disclosed.
摘要翻译： 脉冲超导磁体系统包括设置在真空容器内的真空容器和低温容器组件。 超导线圈位于低温容纳组件内以提供磁场。 容器组件包括氦容器，其包括用于保持液氦和线圈的相对薄的金属内管。 氦容器还包括相对厚的外管，其包围具有位于内管和外管之间的相对刚性的绝缘间隔件的内管，使得管不彼此接触。 外管主要是金属的，并且具有由绝缘材料形成的至少一个接头，以防止外管形成低电阻回路。 内管提供真空密封，外管为内管提供结构支撑，从而降低了电流向线圈斜坡所引起的涡流损耗。 还公开了制造氦容器的方法。
-
公开(公告)号：USRE36332E
公开(公告)日：1999-10-12
申请号：US33946
申请日：1998-03-02
CPC分类号： F25B25/005 , H01F6/04
摘要： A refrigeration system includes a dewar and a refrigerator/liquefier which meets the variable demands of a superconducting magnet within the dewar. The system is sized to meet average loads over a defined duty cycle, and is variably operable to meed demands. In the preferred embodiment, a first supply of fluid circulates through a "condenser" element positioned in a dewar ullage to liquefy a separate supply of fluid in the dewar, and to refrigerate a pulsed cryogenic load therein, such as a superconducting magnet. A portion of the first supply of fluid may be diverted to refrigerate a second pulsed cryogenic load, such as magnet current leads permanently connected to the magnet. The dewar includes a cold gas vapor storage chamber separate from the dewar ullage, and the chamber is preferably located within the inner core of a solenoid superconducting magnet for compact and thermally efficient design. Responsive, independent adjustment of refrigeration to pulsed cryogenic loads is made possible.
摘要翻译： 制冷系统包括杜瓦瓶和冰箱/液化器，其满足杜瓦瓶内的超导磁体的可变需求。 该系统的尺寸适合于在规定的工作周期内满足平均负载，并且可变地可操作以满足需求。 在优选实施例中，第一流体供应通过位于杜瓦瓶中的“冷凝器”元件循环，以液化杜瓦瓶中的单独的液体供应，并使其中的脉冲低温负载（例如超导磁体）冷藏。 第一流体供应的一部分可以被转向以冷却第二脉冲低温负载，例如永久地连接到磁体的磁体电流引线。 杜瓦瓶包括与杜瓦瓶分离的冷气体蒸气储存室，腔室优选位于螺线管超导磁体的内芯内，用于紧凑和热效率的设计。 对脉冲低温负载进行制冷的独立调整成为可能。
-
公开(公告)号：US4694269A
公开(公告)日：1987-09-15
申请号：US638876
申请日：1984-08-08
IPC分类号： A61B10/00 , A61B5/055 , G01R33/3815 , H01F6/00 , H01F7/22
CPC分类号： G01R33/3815 , Y10T29/49014
摘要： A magnet system for providing a localized, substantially homogeneous magnetic field for use in nuclear magnetic resonance imaging. The magnet system includes a vacuum vessel defining a bore for receiving the subject of the imaging. It further includes a cryogenic containment vessel supported within the vacuum vessel. A single coil or "simple" solenoid is positioned within the containment vessel for providing the magnetic field. This coil includes a winding made up of thousands of turns of small superconductive wire, with the winding having a modular geometry including a plurality of axially spaced wire modules. The coil further includes an insulative substance, having a greater coefficient of thermal contraction than that of the wire, distributed in the winding. As the temperature of the coil is reduced from room temperature to its cryogenic operating temperature, the development of localized stress concentrations of sufficient magnitude to rupture the wire, are avoided. A method of winding the coil is also disclosed.
摘要翻译： 用于提供用于核磁共振成像的局部的，基本上均匀的磁场的磁体系统。 磁体系统包括限定用于接收成像对象的孔的真空容器。 其还包括支撑在真空容器内的低温容纳容器。 单个线圈或“简单”螺线管位于安全壳内用于提供磁场。 该线圈包括由数千匝小型超导线构成的绕组，绕组具有包括多个轴向间隔开的线模块的模块化几何形状。 线圈还包括分布在绕组中的具有比电线更大的热收缩系数的绝缘物质。 随着线圈的温度从室温降低到其低温工作温度，避免了足够大的局部应力集中的破裂线的发展。 还公开了卷绕线圈的方法。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.013 秒)
