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21. 发明授权

US3756753A Two stage screw rotor machines 失效
标题翻译：两级螺旋转子机
公开(公告)号：US3756753A
公开(公告)日：1973-09-04
申请号：US3756753D
申请日：1971-07-13
申请人： SVENSKA ROTOR MASKINER AB
发明人： PERSSON W , BENEDICTUS L
IPC分类号： F01C1/16 , F01C11/00 , F01C20/12 , F04C18/16 , F04C17/12
CPC分类号： F01C20/125 , F04C18/16
摘要： A two-stage screw rotor compressor in which each stage is provided with an adjustable slide valve for varying the volumetric capacity of the stage which makes it possible to vary the capacity of the compressor within wide limits while maintaining a higher efficiency within the whole operating range than in hitherto known compressors of this type. Preferably the two valves are interconnected to move in unison.
摘要翻译：两级螺杆转子压缩机，其中每个级设置有可调节的滑阀，用于改变级的容积，这使得可以在宽范围内改变压缩机的容量，同时在整个操作范围内保持更高的效率比迄今所知的这种类型的压缩机。优选地，两个阀互连以一致地移动。

22. 发明授权

US3677664A Rotary mechanical pumps of the screw type 失效
标题翻译：螺旋型旋转机械泵
公开(公告)号：US3677664A
公开(公告)日：1972-07-18
申请号：US3677664D
申请日：1970-06-29
申请人： EDWARDS HIGH VACUUM INT LTD
发明人： WYCLIFFE HENRYK , POWER BASIL DIXON
IPC分类号： F04C18/16 , F04C23/00 , F04C28/28 , F04C29/02 , F04B49/00 , F01C1/16 , F04C17/12
CPC分类号： F04C28/28 , F04C18/16 , F04C23/001 , F04C29/02
摘要： An oil-sealed screw rotor mechanical vacuum pump which may be used as a backing pump, together with a rotary dry-running fine pump, in a high vacuum pumping unit. The screw rotor pump has one or more non-return valves between the chambers being limited by the screw rotor action and the atmosphere. The sealing oil also acts as a ''''liquid piston'''' to sweep pumped medium out of the chambers via the non-return valve(s).
摘要翻译：一种油密封螺杆转子机械真空泵，可在高真空泵送单元中与旋转式干式精细泵一起用作背衬泵。螺杆转子泵在腔室之间具有一个或多个止回阀，其由螺旋转子作用和大气限制。密封油还用作“液体活塞”，以通过止回阀将泵送的介质从室中吹扫出来。

23. 发明授权

US3481532A Compressor 失效
公开(公告)号：US3481532A
公开(公告)日：1969-12-02
申请号：US3481532D
申请日：1967-12-20
申请人： INGERSOLL RAND CO
发明人： FRASER GROVER D
IPC分类号： F04C18/16 , F04C17/12 , F04C25/00
CPC分类号： F04C18/16

24. 发明授权

US3462072A Screw rotor machine 失效
标题翻译：螺旋转子机
公开(公告)号：US3462072A
公开(公告)日：1969-08-19
申请号：US3462072D
申请日：1968-05-02
申请人： SVENSKA ROTOR MASKINER AB
发明人： SCHIBBYE LAURITZ BENEDICTUS
IPC分类号： F04C18/16 , F04C29/00 , F04C17/12 , F04C27/00 , F04C29/02
CPC分类号： F04C29/0007

25. 发明授权

US4185949A Screw compressor with bearing unloading means 失效
标题翻译：螺杆压缩机带轴承卸载装置
公开(公告)号：US4185949A
公开(公告)日：1980-01-29
申请号：US869701
申请日：1978-01-16
申请人： Knut A. L. Lundberg
发明人： Knut A. L. Lundberg
IPC分类号： F04C27/00 , F01C21/02 , F04C18/16 , F04C29/00 , F04C17/12 , F16C19/10 , F16C21/00
CPC分类号： F04C18/16 , F01C21/02 , F04C29/0021
摘要： In a screw compressor, an axial force is transmitted from the rotor shaft to the housing by way of an antifriction bearing including first and second bearing rings and roll bodies therebetween, the first ring being mounted on the shaft while the second ring is supported axially by the housing and is movable radially relative to the housing. A piston mounted concentrically on the shaft is operable by a fluid pressure to decrease the axial force transmitted to the housing, and the piston sealingly cooperates with a surface which is stationary relative to the second bearing ring.
摘要翻译：在螺杆式压缩机中，轴向力通过包括第一和第二轴承环和辊体之间的减摩轴承从转子轴传递到壳体，第一环安装在轴上，而第二环轴向地被支承壳体并且可相对于壳体径向移动。同轴地安装在轴上的活塞可通过流体压力操作，以减小传递到壳体的轴向力，并且活塞与相对于第二轴承环静止的表面密封配合。

26. 发明授权

US4153395A Compressors 失效
标题翻译：压缩机
公开(公告)号：US4153395A
公开(公告)日：1979-05-08
申请号：US830017
申请日：1977-08-30
申请人： Peter A. O'Neill
发明人： Peter A. O'Neill
IPC分类号： F01C21/02 , F04C27/00 , F04C29/12 , F04C17/12 , F04C23/00 , F04C29/00
CPC分类号： F04C29/12 , F01C21/02 , F04C27/009
摘要： In screw compressors for fluids there is normally leakage of fluid axially through the rotor-shaft bearing assemblies at the high-pressure end of the casing housing the interacting rotors. To obviate or mitigate the resulting inefficiency in the operation of the compressor, and also reduce atmosphere pollution arising from the leakage, a fluid coupling is provided between said bearing assemblies and an additional fluid inlet opening in the compressor casing, said additional opening being positioned to communicate with a land of the rotor when the rotor is at or beyond rotor cut-off, so that fluid leaking from the compression chamber is recirculated to the compression chamber.
摘要翻译：在用于流体的螺杆式压缩机中，通常在容纳相互作用的转子的壳体的高压端处轴向地通过转子轴承组件泄漏流体。为了消除或减轻压缩机运行中的低效率，并且还减少由泄漏引起的大气污染，在所述轴承组件和压缩机壳体中的另外的流体入口之间提供流体联接，所述附加开口定位成当转子处于或超过转子切断时，与转子的平台通信，使得从压缩室泄漏的流体再循环到压缩室。

27. 发明授权

US4140445A Screw-rotor machine with straight flank sections 失效
标题翻译：螺旋转子机具有直的侧面部分
公开(公告)号：US4140445A
公开(公告)日：1979-02-20
申请号：US782017
申请日：1977-03-28
申请人： Cauritz B. Schibbye
发明人： Cauritz B. Schibbye
IPC分类号： F01C1/08 , F01C1/16 , F04C17/12 , F16H55/08
CPC分类号： F01C1/084 , Y10T74/19953
摘要： Screw rotor machine comprising male and female rotors, where the profile of the flanks of the female rotor comprises portions inside and outside the pitch circle thereof, which portions at the point of intersection with the pitch circle have a common tangent and different radii of curvature and the profiles of the flanks of the male rotor inside the pitch circle have a generally straight section.
摘要翻译：螺旋转子机器包括公转轮和母转子，其中，母转子的侧面的轮廓包括在其节圆之内和之外的部分，与节圆的交点处的部分具有共同的切线和不同的曲率半径，在螺旋圆内的阳转子的侧面的轮廓具有大致直的部分。

28. 发明授权

US4088427A Rotors for a screw rotor machine 失效
标题翻译：螺杆转子机转子
公开(公告)号：US4088427A
公开(公告)日：1978-05-09
申请号：US722645
申请日：1976-09-13
申请人： Kaj B. I. Emanuelsson , Sven E. Eriksson
发明人： Kaj B. I. Emanuelsson , Sven E. Eriksson
IPC分类号： F01C1/08 , F01C1/16 , F04C17/12
CPC分类号： F01C1/084 , F01C1/16
摘要： A pair of cooperating rotors for a screw rotor machine, comprising a main rotor with a dedendum and a gate rotor with an addendum. One flank of each gate rotor land is generated inside the pitch circle of the gate rotor by the crest of the main rotor land and is generated outside the pitch circle by a portion of the main rotor inside the pitch circle and is formed to sealingly cooperate with the main rotor land so that gear action is obtained only outside the pitch circle of the gate rotor and inside the pitch circle of the main rotor.
摘要翻译：一种用于螺杆转子机器的协作转子，包括具有齿根的主转子和带齿顶的闸转子。每个门转子平台的一个侧面由主转子平台的顶部在门转子的节圆内部产生，并且在节圆之间的主转子的一部分在节圆之外产生并形成为与主转子平台，使得仅在门转子的节圆外侧和主转子的节圆内部获得齿轮作用。

29. 发明授权

US4068984A Multi-stage screw-compressor with different tooth profiles 失效
标题翻译：具有不同齿廓的多级螺杆压缩机
公开(公告)号：US4068984A
公开(公告)日：1978-01-17
申请号：US529115
申请日：1974-12-03
申请人： Walter G. Spindler
发明人： Walter G. Spindler
IPC分类号： F04C18/16 , F01C1/16 , F01C11/00 , F04C17/12 , F04C23/00
CPC分类号： F04C18/16
摘要： A screw compressor has at least two pairs of compressor rotors arranged in series, the outside diameter of the rotors of the two pairs being substantially the same, and the ratio of the outside diameter to the diameter at the base of the rotor teeth or vanes of the second pair being such that the capacity of the rotors corresponds to the intake volume of fluid to be compressed flowing from the first to the second pair of rotors.
摘要翻译：螺杆式压缩机具有串联布置的至少两对压缩机转子，两对转子的外径基本相同，并且外径与转子齿或叶片底部直径之比第二对使得转子的容量对应于从第一对转子流到第二对转子的待压缩流体的进气体积。

30. 发明授权

US4018549A Screw pump 失效
标题翻译：螺杆泵
公开(公告)号：US4018549A
公开(公告)日：1977-04-19
申请号：US671486
申请日：1976-03-29
申请人： Lars Segerstrom
发明人： Lars Segerstrom
IPC分类号： F04C2/16 , F04C17/12
CPC分类号： F04C2/165 , F04C2/16
摘要： A screw pump includes a screw unit having a drive screw and two impeller screws arranged symmetrically around the drive screw. The screws are enclosed in a housing having mutually intersecting passages for accommodating the screws, and the unit is constructed so that the screws seal against each other and against the housing to form chambers in which liquid is carried from the suction side to the pressure side during rotation of the screws. On the pressure side in the passage accommodating one of the impeller screws there is formed a recess which extends from the pressure side and the length of which is such that each chamber is opened at separate time intervals with respect to the two impeller screws instead of simultaneously.
摘要翻译：螺杆泵包括具有驱动螺杆的螺杆单元和围绕驱动螺杆对称布置的两个叶轮螺杆。螺钉被封闭在具有用于容纳螺钉的相互相交的通道的壳体中，并且单元被构造成使得螺钉彼此密封并抵靠壳体以形成室，其中液体从吸力侧承载到压力侧旋转螺丝。在容纳一个叶轮螺杆的通道中的压力侧上形成有从压力侧延伸的凹部，其长度使得每个室相对于两个叶轮螺杆以分开的时间间隔而不是同时地打开。

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