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1. 发明申请

US20100296958A1 Screw Pump 有权
标题翻译：螺杆泵
公开(公告)号：US20100296958A1
公开(公告)日：2010-11-25
申请号：US12086034
申请日：2006-12-04
申请人： Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
发明人： Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
IPC分类号： F04C18/16
CPC分类号： F04C18/16 , F04C18/084 , F04C2250/201
摘要： A screw pump (10) comprises a stator (12) having a fluid inlet (18) and a fluid outlet (20), the stator housing first and second externally threaded, tapered rotors (26, 28) mounted on respective shafts and adapted for counter-rotation within the stator (12) to compress fluid passing from the fluid inlet to the fluid outlet, wherein the threads (30, 32) have a pitch that increases towards the fluid outlet (20).
摘要翻译：螺杆泵（10）包括具有流体入口（18）和流体出口（20）的定子（12），所述定子壳体安装在相应的轴上的第一和第二外螺纹的锥形转子（26,28）定子（12）内的反向旋转以压缩从流体入口流到流体出口的流体，其中螺纹（30,32）具有朝着流体出口（20）增加的间距。

2. 发明申请

US20060269424A1 Vacuum pump 审中-公开
标题翻译：真空泵
公开(公告)号：US20060269424A1
公开(公告)日：2006-11-30
申请号：US11233681
申请日：2005-09-23
申请人： Michael Henry North
发明人： Michael Henry North
IPC分类号： F04B39/06
CPC分类号： F04B39/062 , F04C18/16 , F04C29/04 , F04C2220/12 , F04C2270/19
摘要： A method for controlling the temperature of a rotor of a vacuum pump comprising said rotor and a stator comprises the steps of flowing a rotor cooling fluid through a rotor cooling circuit to cool the rotor, flowing a stator cooling fluid through a stator cooling circuit to cool the stator, conveying the stator cooling fluid from the stator cooling circuit to a heat exchanger of the rotor cooling circuit to cool the rotor cooling fluid, returning the stator cooling fluid from the heat exchanger of the rotor cooling circuit to the stator cooling circuit, supplying a further coolant to a heat exchanger of the stator cooling circuit to cool the stator cooling fluid, and controlling the supply of further coolant to the heat exchanger of the stator cooling circuit to control the temperature of the stator cooling fluid.
摘要翻译：一种用于控制包括所述转子和定子的真空泵的转子的温度的方法包括以下步骤：使转子冷却流体流过转子冷却回路以冷却转子，使定子冷却流体通过定子冷却回路流动以冷却定子将定子冷却流体从定子冷却回路输送到转子冷却回路的热交换器，以冷却转子冷却流体，将定子冷却流体从转子冷却回路的热交换器返回到定子冷却回路，供给进一步冷却到定子冷却回路的热交换器以冷却定子冷却流体，以及控制向定子冷却回路的热交换器供应另外的冷却剂以控制定子冷却流体的温度。

3. 发明授权

US06537049B2 Screw pump having a thermal shield 失效
标题翻译：带有热屏蔽的螺杆泵
公开(公告)号：US06537049B2
公开(公告)日：2003-03-25
申请号：US10035889
申请日：2001-11-07
申请人： Nigel Paul Schofield , Michael Henry North
发明人： Nigel Paul Schofield , Michael Henry North
IPC分类号： F04C1816
CPC分类号： F04C29/0078 , F04C18/16
摘要： A screw pump has two parallel shafts mounted in a pump body, each shaft thereon and each rotor has at least one helical vane or thread. When the helical vanes or threads inter mesh causing a fluid to be pumped from an inlet towards an outlet of the pump. The bearings associated with each shaft are being positioned in cavities within the first and second rotors which are sealed at their ends closest to the pump inlet. A thermal shield is provided between the bearing arrangements and the internal cavity surfaces.
摘要翻译：螺杆泵具有安装在泵体中的两个平行轴，每个轴上，每个转子具有至少一个螺旋叶片或螺纹。当螺旋叶片或螺纹相互啮合时，使流体从入口泵向泵的出口。与每个轴相关联的轴承被定位在第一和第二转子内的空腔中，其在最靠近泵入口的端部被密封。在轴承装置和内部空腔表面之间提供热屏蔽。

4. 发明授权

US06217305B1 Screw pumps 有权
标题翻译：螺杆泵
公开(公告)号：US06217305B1
公开(公告)日：2001-04-17
申请号：US09334323
申请日：1999-06-16
申请人： Nigel Paul Schofield , Michael Henry North
发明人： Nigel Paul Schofield , Michael Henry North
IPC分类号： F03C200
CPC分类号： F01C21/02 , F04C18/084 , F04C18/16 , F04C29/0078 , F04C2240/50 , F04C2250/201
摘要： A screw pump provided with a first shaft and spaced therefrom and parallel thereto a second shaft mounted in a pump body. A first rotor is mounted on the first shaft and a second rotor mounted on the second shaft. Each of the first and second rotors having formed on an outer surface thereof one or more one helical vanes or threads intermeshing together so that rotary movement of the shafts will cause a fluid to be pumped. A first bearing arrangement is associated with the first shaft and a second bearing arrangement is associated with the second shaft. A bearing carrier is provided for each bearing arrangement and mounted within the pump body so as to be independent from each other.
摘要翻译：螺杆泵设置有第一轴并且与其平行并与其平行的第二轴安装在泵体中。第一转子安装在第一轴上，第二转子安装在第二轴上。第一和第二转子中的每一个在其外表面上形成有一个或多个螺旋叶片或螺纹相互啮合在一起，使得轴的旋转运动将导致流体被泵送。第一轴承装置与第一轴相关联，并且第二轴承装置与第二轴相关联。为每个轴承装置设置一个轴承架，并安装在泵体内，以便彼此独立。

5. 发明授权

US6129534A Vacuum pumps 有权
标题翻译：真空泵
公开(公告)号：US6129534A
公开(公告)日：2000-10-10
申请号：US334316
申请日：1999-06-16
申请人： Nigel Paul Schofield , Michael Henry North
发明人： Nigel Paul Schofield , Michael Henry North
IPC分类号： F04C18/16 , F04C23/00 , F01C1/24
CPC分类号： F04C23/001 , F04C18/16 , F04C2250/201 , F04C2270/03
摘要： A compound vacuum pump incorporating a screw mechanism section. The screw mechanism section comprising two externally threaded rotors mounted on respective shafts in a pump body. The rotors are adapted for counter-rotation in a first chamber within the pump body with intermeshing of the rotor threads to pump gas by action of the rotors. The root diameter of each rotor increases and the thread diameter of each rotor decreases in a direction taken from pump inlet and in which the gas is pumped. The pump additionally incorporates a roots mechanism section comprising two roots-type profile rotors also mounted on the respective shafts and adapted for counter-rotation in a second chamber within the pump body situated at an inlet end of the pump.
摘要翻译：一种结合螺旋机构部分的复合真空泵。螺杆机构部分包括安装在泵体中相应轴上的两个外螺纹转子。转子适于在泵体内的第一室中反转，通过转子的作用使转子螺纹与泵送气体相互啮合。每个转子的根直径增加，并且每个转子的螺纹直径在从泵入口取出的方向上减小，并且其中气体被泵送。泵还包括根机构部分，其包括两个根型轮廓转子，其也安装在相应的轴上并且适于在位于泵的入口端处的泵体内的第二室中的反向旋转。

6. 发明授权

US07963744B2 Cooling of pump rotors 有权
标题翻译：泵转子冷却
公开(公告)号：US07963744B2
公开(公告)日：2011-06-21
申请号：US11661490
申请日：2005-08-17
申请人： Michael Henry North
发明人： Michael Henry North
IPC分类号： F04D29/58 , F04C29/04 , F04C18/16
CPC分类号： F04C29/04 , F04C18/084 , F04C18/16 , F04C29/023 , F04C2240/60 , F04C2240/603
摘要： A rotor for a screw vacuum pump has a threaded body in which a central cavity is formed. A coolant is supplied to the cavity from a supply line provided in a shaft attached to the body. A coolant flow guide, which may be either separate from or at least partially integral with the shaft, is located within the cavity. The flow guide has an outer surface adjacent, preferably in contact with, the body to enable heat to the transferred from the rotor to the guide. The guide also has an inner surface defining a bore, and defines at least in part a plurality of axially extending slots radially spaced from and in fluid communication with the bore. In use, coolant flows into the cavity through the bore of the guide, and out from the cavity through the axially extending slots, extracting heat from the guide as it flows both into and out form the cavity. The discharged coolant is conveyed form the slots into a discharge line located within the shaft.
摘要翻译：用于螺杆式真空泵的转子具有形成中心空腔的螺纹体。冷却剂从设置在连接到主体的轴的供应管线供应到空腔。可以与轴分离或至少部分地与轴一体的冷却剂流动引导件位于腔内。流动引导件具有与主体相邻的外表面，优选地与主体接触以使得能够从转子传递到引导件的热量。引导件还具有限定孔的内表面，并且至少部分地限定与孔径向间隔开并与其流体连通的多个轴向延伸槽。在使用中，冷却剂通过引导件的孔流入空腔，并且通过轴向延伸的槽从空腔中流出，当引导件从空腔流入和流出时从引导件中提取热量。排出的冷却剂从槽口输送到位于轴内的排放管线。

7. 发明授权

US08827669B2 Screw pump having varying pitches 有权
标题翻译：螺杆泵具有不同的间距
公开(公告)号：US08827669B2
公开(公告)日：2014-09-09
申请号：US12086034
申请日：2006-12-04
申请人： Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
发明人： Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
IPC分类号： F03C2/00 , F03C4/00 , F04C18/00 , F04C18/16 , F04C18/08
CPC分类号： F04C18/16 , F04C18/084 , F04C2250/201
摘要： A screw pump includes a stator having a fluid inlet and a fluid outlet, the stator housing first and second externally threaded, tapered rotors mounted on respective shafts and adapted for counter-rotation within the stator to compress fluid passing from the fluid inlet to the fluid outlet, wherein the threads have a pitch that increases towards the fluid outlet.
摘要翻译：螺杆泵包括具有流体入口和流体出口的定子，定子壳体安装在相应轴上的第一和第二外螺纹锥形转子，并且适于在定子内反向旋转以压缩从流体入口流到流体的流体出口，其中螺纹具有朝向流体出口增加的螺距。

8. 发明授权

US06200116B1 Vacuum pumps 有权
标题翻译：真空泵
公开(公告)号：US06200116B1
公开(公告)日：2001-03-13
申请号：US09334236
申请日：1999-06-16
申请人： Nigel Paul Schofield , Michael Henry North
发明人： Nigel Paul Schofield , Michael Henry North
IPC分类号： F01C124
CPC分类号： F01C21/02 , F04C18/084 , F04C18/16 , F04C29/0078 , F04C2240/50 , F04C2250/201
摘要： A vacuum pump incorporating a screw mechanism section and comprising two externally threaded rotors mounted on respective shafts in a pump body. The externally threaded rotors are adapted for counter-rotation in a first chamber within the pump body with intermeshing of the rotor threads in order to pump gas from a pump inlet by action of the rotors. The root diameter of each rotor increases and the thread diameter of each rotor decreases in a direction from pump inlet and in which the gas is pumped. The two externally threaded rotors are positioned in the pump body by means of shaft bearings located inside cavities in the rotors. The cavities are sealed at the ends closest to the pump inlet.
摘要翻译：一种包括螺旋机构部分的真空泵，包括安装在泵体内的相应轴上的两个外螺纹转子。外螺纹转子适于在泵主体内的第一室中进行反向转动，其中转子螺纹相互啮合，以便通过转子的作用从泵入口泵送气体。每个转子的根直径增加，并且每个转子的螺纹直径在从泵入口的方向上减小，并且其中泵送气体。两个外螺纹转子通过位于转子内腔内的轴承座定位在泵体内。空腔在最靠近泵入口的端部密封。

9. 发明授权

US06672855B2 Vacuum pumps 有权
标题翻译：真空泵
公开(公告)号：US06672855B2
公开(公告)日：2004-01-06
申请号：US09740085
申请日：2000-12-19
申请人： Michael Henry North
发明人： Michael Henry North
IPC分类号： F04C1800
CPC分类号： F04C18/084 , F04C18/16 , F04C2220/12 , F04C2250/201
摘要： A vacuum pump having a screw mechanism and comprising two externally threaded rotors mounted on respective shafts in a pump body and adapted for counter-rotation therein with intermeshing of the rotor threads with close tolerances between the threads and internal surfaces of the pump body in order that gas may be pumped from a pump inlet to a pump outlet by action of the rotor threads, the root diameter of each rotor increases and the thread diameter of each rotor decreases in a direction from the pump inlet to the pump outlet, and wherein the pitch of the rotor threads decreases in a direction from the pump inlet to the pump outlet.
摘要翻译：一种真空泵，其具有螺旋机构并且包括两个外螺纹转子，其安装在泵体中的相应轴上并且适于在其中反向旋转，其中转子螺纹与螺纹和泵体的内表面之间的紧公差相互啮合，以便气体可以通过转子螺纹的作用从泵入口泵送到泵出口，每个转子的根直径增加，并且每个转子的螺纹直径在从泵入口到泵出口的方向上减小，并且其中间距的转子螺纹在从泵入口到泵出口的方向上减小。

10. 发明授权

US06916162B2 Scroll compressor 有权
标题翻译：涡旋压缩机
公开(公告)号：US06916162B2
公开(公告)日：2005-07-12
申请号：US10425220
申请日：2003-04-29
申请人： Nigel Paul Schofield , Michael Henry North , David John Goodwin
发明人： Nigel Paul Schofield , Michael Henry North , David John Goodwin
IPC分类号： F04C18/02 , F04C27/00
CPC分类号： F04C27/001 , F04C18/0269 , F04C2230/602
摘要： A scroll compressor which comprises a scroll assembly comprising two scroll walls, and a drive for causing a relative orbiting motion between the scroll walls for compressing fluid on two fluid flow paths between an inlet and an exhaust of the scroll assembly. A first fluid flow path is formed between a wall surfaces of the scroll walls and a second fluid flow path is formed between another facing wall surfaces of the scroll walls. A first ambient clearance A1 is selected between the first two facing surfaces, and a second ambient clearance A2 is selected between the second two facing surfaces, and where the first and the second ambient clearances are selected independently from each other. Independent selection permits each ambient clearance to be designed according to its own performance requirements, to take into account thermal expansion and manufacturing tolerances.
摘要翻译：一种涡旋压缩机，包括一个包括两个涡旋壁的涡旋组件，以及用于在涡旋壁之间进行相对运动的驱动装置，用于在涡旋组件的入口和排气之间的两个流体流动路径上压缩流体。第一流体流动路径形成在涡旋壁的壁表面之间，并且第二流体流动路径形成在涡旋壁的另一相对壁面之间。在前两个相对表面之间选择第一环境空隙A 1＆lt; 1＆gt;，并且在第二两个相对表面之间选择第二环境空隙A 2 2，并且其中第一和第二环境间隙彼此独立地选择。独立选择允许根据其自身的性能要求设计每个环境间隙，以考虑热膨胀和制造公差。

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