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公开(公告)号：US07056108B2
公开(公告)日：2006-06-06
申请号：US10495796
申请日：2002-10-30
申请人： Manfred Behling , Hartmut Kriehn , Klaus Rofall , Ralf Steffens
发明人： Manfred Behling , Hartmut Kriehn , Klaus Rofall , Ralf Steffens
CPC分类号： F04C18/086 , F04C18/16 , F04C29/04 , F04C29/045 , F04C2240/603
摘要： A screw-type vacuum pump (1) includes a pump housing (2, 6) with rotors (3, 4). A liquid cooling system cools the rotors and a drive motor (9). In order to improve the cooling of said pump, an external air-flow impelled cooling system is also provided for the pump housing (2, 6).
摘要翻译： 螺杆式真空泵（1）包括具有转子（3,4）的泵壳体（2,6）。 液体冷却系统冷却转子和驱动马达（9）。 为了改善所述泵的冷却，还为泵壳体（2,6）提供外部空气流动推进冷却系统。
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2.发明授权
公开(公告)号：US4940398A
公开(公告)日：1990-07-10
申请号：US193659
申请日：1988-05-13
CPC分类号： F04C18/123 , F01C21/02 , F04C23/00 , F04C23/001 , F04C27/009 , F04C29/005 , F04C2240/52
摘要： A twin-shaft vacuum pump having a pair of shafts, at least one pump chamber, a pair of rotors disposed in the or in each pump chamber and mounted on the shafts, and housing members defining the pump chamber or chambers, a synchronization mechanism composed of two gears disposed in a side chamber, a drive motor, and a transmission mechanism connecting the drive motor to one of the shafts. In order to simplify installation and servicing of the pump, the shafts are mounted vertically. The side chamber, synchronization mechanism, and transmission mechanism are disposed below the lower rotor pair.
摘要翻译： 一种双轴真空泵，其具有一对轴，至少一个泵室，设置在每个泵室中或每个泵室中并安装在轴上的一对转子以及限定泵室或室的壳体构件，组合的同步机构 设置在侧室中的两个齿轮，驱动马达和将驱动马达连接到其中一个轴的传动机构。 为了简化泵的安装和维修，轴垂直安装。 侧室，同步机构和传动机构设置在下转子对下方。
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公开(公告)号：US08876506B2
公开(公告)日：2014-11-04
申请号：US13408191
申请日：2012-02-29
申请人： Ralf Steffens
发明人： Ralf Steffens
CPC分类号： F04C18/16 , F04C18/084 , F04C29/04 , F04C2220/12
摘要： The invention relates to a dry-compressing dual-shaft rotary displacement screw spindle pump machine for delivering and compressing gases. The spindle rotor pair therein includes multiple stages, having a primary delivery thread, a secondary delivery thread and a gas outlet collector chamber therebetween. The primary delivery thread head circle diameter decreases in the gas outlet direction, while the foot circle diameter thereof increases correspondingly for an application-specific matching inner “integral” compression ratio. The secondary delivery thread nominal delivery direction is opposite to the primary delivery thread nominal delivery direction. The secondary delivery thread is implemented such that the actual gas flow direction is opposite to the nominal delivery direction thereof, and is always directed away from the gas outlet plenum, having a gas permeation under ambient pressure just as the space in the gearbox. A control gas delivery stage is additionally provided for very high operating pressures.
摘要翻译： 本发明涉及一种用于输送和压缩气体的干压缩双轴旋转移位螺杆主轴泵机。 其中的主轴转子对包括多个级，其中具有主输出螺纹，二次输送螺纹和气体出口收集器室。 主输送螺纹头圆直径在气体出口方向上减小，而对于特定于应用的匹配内“积分”压缩比，其脚圆直径相应增加。 二次输送螺纹标称输送方向与主输送螺纹标称输送方向相反。 次级输送螺纹被实施为使得实际的气体流动方向与其标称输送方向相反，并且总是被引导离开气体出口压力室，其在环境压力下具有与齿轮箱中的空间一样的气体渗透。 另外为非常高的操作压力提供控制气体输送级。
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公开(公告)号：US5924855A
公开(公告)日：1999-07-20
申请号：US981322
申请日：1997-12-15
申请人： Christian Dahmlos , Dietmar Rook , Ralf Steffens
发明人： Christian Dahmlos , Dietmar Rook , Ralf Steffens
CPC分类号： F04C18/16 , F01C21/02 , F04C29/04 , F04C2240/402 , F04C2240/51
摘要： The invention provides a two-rotors screw compressor having active cooling means on the pressure side of the motive rotor.
摘要翻译： PCT No.PCT / EP96 / 02631 Sec。 371 1997年12月15日第 102（e）1997年12月15日日期PCT PCT 1996年6月18日PCT公布。 出版物WO97 / 01038 PCT 日期1997年1月9日本发明提供一种在转子的压力侧具有主动冷却装置的双转子螺杆式压缩机。
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公开(公告)号：US20170089342A1
公开(公告)日：2017-03-30
申请号：US15316010
申请日：2015-06-03
申请人： Ralf Steffens , Steffen KLEIN
发明人： Ralf Steffens
CPC分类号： F04C29/04 , F04C18/54 , F04C18/565 , F04C28/08 , F04C2270/19
摘要： The invention relates to a spindle compressor without operating fluid in the working space with a 2-tooth spindle rotor and a 3-tooth spindle rotor in a surrounding compressor housing-and preferably non-parallel rotation axes of the two spindle rotors, in particular for use in compression refrigeration machines. In order to improve the degree of efficiency while providing flexible power adjustment, it is proposed according to the invention that a multi-stage spindle compressor be used as a refrigerant compressor, whose compressor housing and whose spindle rotors are cooled via a partial-flow branch-off of liquid refrigerant from the refrigerant main flow circuit, wherein the compressor housing is cooled in a controlled manner by means of refrigerant evaporation, with the refrigerant vapor being subsequently fed to the inlet, and that, for power adjustment, there are also post-inlet feeds into the working space in addition to the inlet feed, and also pre-outlet discharges in addition to the outlet discharge from the outlet space, each with their own regulating device.
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公开(公告)号：US4974318A
公开(公告)日：1990-12-04
申请号：US458384
申请日：1989-12-28
CPC分类号： F01C1/082 , F01C1/126 , Y10T29/49236 , Y10T29/49242 , Y10T29/4984
摘要： A dual-shaft machine comprising a housing, two pistons rotatably mounted in the housing leaving a cold play spacing between one another and said housing, and a coating provided on either the housing or the pistons, or both, to reduce the cold play spacing to that required by the intended field of use of the machine.
摘要翻译： 一种双轴机器，包括壳体，两个可旋转地安装在壳体中的活塞，两个活塞之间留下冷冲击间隔和所述壳体，以及设置在壳体或活塞上或两者上的涂层，以将冷空气间隔减小到 这是由机器的预期使用场所所要求的。
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公开(公告)号：US5767635A
公开(公告)日：1998-06-16
申请号：US553318
申请日：1995-11-21
申请人： Ralf Steffens , Andreas Salmen
发明人： Ralf Steffens , Andreas Salmen
CPC分类号： F04C28/08 , F04C28/28 , F04C29/0085 , H02P5/50 , F04C2240/402
摘要： In a displacement machine for compressible media having at least two rotors (14a-c) which are configured as profiled bodies and whose profiles engage with one another in the manner of gearwheels during rotation, the individual rotors are respectively driven by their own electric motors (9a-c) and are kept synchronous in rotational speed and angular position by electronic closed-loop and/or open-loop control units (1; 25a-c) in accordance with the transmission ratio of the displacer unit stage. The electronics can be employed for monitoring further operating data of the pump and also for matching the pump output by changing rotational speed. It can also be used as an overload protection. The rotational speeds and rotational attitudes of the rotors are controlled individually and independently of one another, the required attitude values being specified to the individual control units (25a-c) by means of a main control unit (1).
摘要翻译： PCT No.PCT / EP94 / 01818 Sec。 371日期：1995年11月21日 102（e）1995年11月21日日期PCT PCT 1994年6月3日PCT公布。 公开号WO94 / 29596 日期1994年12月22日在具有至少两个转子（14a-c）的可压缩介质的移动机器中，其构造为成型体并且其轮廓在旋转期间以齿轮的方式彼此接合，各个转子分别由 它们自己的电动机（9a-c），并且根据排量器单元级的传动比，通过电子闭环和/或开环控制单元（1; 25a-c）在转速和角位置保持同步 。 该电子部件可用于监测泵的进一步操作数据，并且还用于通过改变转速匹配泵输出。 它也可以用作过载保护。 转子的旋转速度和旋转姿态被独立地彼此独立地控制，所需的姿态值通过主控制单元（1）被指定给各个控制单元（25a-c）。
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公开(公告)号：US5152684A
公开(公告)日：1992-10-06
申请号：US750322
申请日：1991-08-27
申请人： Ralf Steffens
发明人： Ralf Steffens
CPC分类号： F04C18/126
摘要： A dual rotor Roots type vacuum pump has an improved rotor profile contour resulting in high area efficiency, high volumetric efficiency, reduced backstreaming and simplified economical manufacturing which yields a compact, cost effective pump.
摘要翻译： 双转子罗茨式真空泵具有改进的转子轮廓轮廓，导致高面积效率，高体积效率，减少的回流和简化的经济制造，从而产生紧凑的成本效益的泵。
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9.发明授权
公开(公告)号：US4983107A
公开(公告)日：1991-01-08
申请号：US192559
申请日：1988-05-11
CPC分类号： F04C18/082 , F04C29/04
摘要： A twin-shaft vacuum pump includes a pump chamber, a pair of rotary pistons disposed in the pump chamber, and plates which laterally delimit the pump chamber, and a housing ring which peripherally delimits the pump chamber. In order to increase the ability of the pump to withstand thermal stresses, the housing ring and the rotary pistons are made of different materials, with the coefficient of expansion of the piston material being lower than the coefficient of expansion of the housing material. Other improvements include cooling of the lateral end plates, cooling of the rotors, and the provision of sleeves which serve to fix the position of the rotors on the shafts and which are composed of a material whose coefficient of expansion is lower than that of the rotor material.
摘要翻译： 双轴真空泵包括泵室，设置在泵室中的一对旋转活塞和横向限定泵室的板，以及外围限定泵室的壳体环。 为了增加泵承受热应力的能力，壳体环和旋转活塞由不同的材料制成，活塞材料的膨胀系数低于壳体材料的膨胀系数。 其他改进包括冷却侧端板，冷却转子，以及提供套筒，用于将转子的位置固定在轴上，该套筒的膨胀系数低于转子的膨胀系数 材料。
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公开(公告)号：US10337515B2
公开(公告)日：2019-07-02
申请号：US15316010
申请日：2015-06-03
申请人： Ralf Steffens , Steffen Klein
发明人： Ralf Steffens
摘要： The invention relates to a spindle compressor without operating fluid in the working space with a 2-tooth spindle rotor and a 3-tooth spindle rotor in a surrounding compressor housing-and preferably non-parallel rotation axes of the two spindle rotors, in particular for use in compression refrigeration machines. In order to improve the degree of efficiency while providing flexible power adjustment, it is proposed according to the invention that a multi-stage spindle compressor be used as a refrigerant compressor, whose compressor housing and whose spindle rotors are cooled via a partial-flow branch-off of liquid refrigerant from the refrigerant main flow circuit, wherein the compressor housing is cooled in a controlled manner by means of refrigerant evaporation, with the refrigerant vapor being subsequently fed to the inlet, and that, for power adjustment, there are also post-inlet feeds into the working space in addition to the inlet feed, and also pre-outlet discharges in addition to the outlet discharge from the outlet space, each with their own regulating device.
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