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1. 发明授权

US08876506B2 Displacement pump with internal compression 有权
标题翻译：排量泵内压
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
IPC分类号： F04C18/16 , F04C29/04 , F04C18/08
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。

2. 发明授权

US5924855A Screw compressor with cooling 失效
标题翻译：螺杆式压缩机冷却
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
IPC分类号： F01C1/16 , F01C21/02 , F04C18/16 , F04C29/00 , F04C29/02 , F04C29/04
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。

3. 发明申请

US20170089342A1 COMPRESSION REFRIGERATION MACHINE HAVING A SPINDLE COMPRESSOR 审中-公开
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
IPC分类号： F04C29/04 , F04C23/00 , F04C28/08 , F04C18/14
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.

4. 发明授权

US4974318A Method of making a dual-shaft machine 失效
标题翻译：制造双轴机的方法
公开(公告)号：US4974318A
公开(公告)日：1990-12-04
申请号：US458384
申请日：1989-12-28
申请人： Josef Heppekausen , Hans-Peter Kabelitz , Karl-Heinz Ronthaler , Ralf Steffens
发明人： Josef Heppekausen , Hans-Peter Kabelitz , Karl-Heinz Ronthaler , Ralf Steffens
IPC分类号： F04C18/18 , F01C1/08 , F01C1/12 , F01C1/18 , F01C21/08 , F04C29/00
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。

5. 发明授权

US5767635A Displacement machine with electronic motor synchronization 失效
标题翻译：位移机与电子电机同步
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
IPC分类号： F04C18/02 , F04C28/08 , F04C28/28 , F04C29/00 , H02P5/50 , H02P5/46 , G05D13/62
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）。

6. 发明授权

US5152684A Rotor profile for a Roots vacuum pump 失效
标题翻译： ROTOR真空泵的转子轮廓
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
IPC分类号： F04C18/18 , F04C18/12
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。

7. 发明授权

US4983107A Multistage rotary piston vacuum pump having sleeves to fix shaft positions 失效
标题翻译：多级旋转活塞真空泵具有固定轴位置的套筒
公开(公告)号：US4983107A
公开(公告)日：1991-01-08
申请号：US192559
申请日：1988-05-11
申请人： Ralf Steffens , Hans-Peter Kabelitz , Hanns-Peter Berges , Wolfgang Leier
发明人： Ralf Steffens , Hans-Peter Kabelitz , Hanns-Peter Berges , Wolfgang Leier
IPC分类号： F04C18/12 , F04C18/08 , F04C18/16 , F04C18/18 , F04C25/02 , F04C29/04
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。

8. 发明授权

US10337515B2 Spindle compressor using refrigerant cooling for housing and rotor 有权
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
IPC分类号： F04C18/54 , F04C18/56 , F04C28/08 , F04C29/04
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.

9. 发明申请

US20120171068A1 Displacement Pump with Internal Compression 有权
标题翻译：具有内部压缩的排量泵
公开(公告)号：US20120171068A1
公开(公告)日：2012-07-05
申请号：US13408191
申请日：2012-02-29
申请人： Ralf Steffens
发明人： Ralf Steffens
IPC分类号： F04C18/16 , F04C29/04
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，并且总是指向远离气体出口气室，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。

10. 发明授权

US06497563B1 Dry-compressing screw pump having cooling medium through hollow rotor spindles 有权
标题翻译：干式压缩螺杆泵通过中空转子心轴具有冷却介质
公开(公告)号：US06497563B1
公开(公告)日：2002-12-24
申请号：US09712435
申请日：2000-11-14
申请人： Ralf Steffens
发明人： Ralf Steffens
IPC分类号： F04C1816
CPC分类号： F04C18/084 , F04C18/16 , F04C27/009 , F04C29/025 , F04C29/04
摘要： A dry-compressing screw pump in the form of a two-shaft positive displacement pump. A first and a second rotor spindle are disposed parallel to each other. The rotor spindles are hollow. A cooling medium is fed at a first front face of the rotor spindles and evacuated at a second front face of the rotor spindles. A cooling medium feeding and evacuation means is connected to an external cooling medium circuit. The inner diameter of the rotor spindles monotonously increases from the first front face toward the second front face so that the cooling medium is conveyed from the first front face to the second front face substantially under the influence of centrifugal force acting on the cooling medium due to the rotation of the rotor spindle.
摘要翻译：一种双轴容积式泵的干式压缩螺杆泵。第一和第二转子轴彼此平行设置。转子主轴是中空的。冷却介质在转子主轴的第一前表面处被供给并且在转子主轴的第二前表面处抽真空。冷却介质供给和排出装置连接到外部冷却介质回路。转子主轴的内径从第一前面朝向第二前面单调增加，使得冷却介质基本上受到作用在冷却介质上的离心力的影响而从第一前表面传送到第二前表面由于转子主轴的旋转。

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