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公开(公告)号：US12129851B2
公开(公告)日：2024-10-29
申请号：US18071801
申请日：2022-11-30
发明人： Michael Rolfes , Paul Krampe
CPC分类号： F04C2/1073 , F04C14/06 , F04C14/28 , F04C15/0065 , F04C2230/601 , F04C2250/201
摘要： An eccentric screw pump for delivering solid-laden liquids includes a rotor and a stator within which the rotor is rotatably arranged. The rotor and stator are arranged and designed with respect to one another in such a way that at least one chamber is formed, which serves to transport the liquid. The eccentric screw pump has a drive motor for rotating the rotor, a control device for controlling the drive motor at least in a working state, in which the rotor is rotated, and an idle state, in which the rotor does not rotate, and an engagement unit, which is designed to set an engagement between the rotor and stator to an idle engagement in the idle state and to a working engagement in the working state. The idle engagement is less than the working engagement. A method for operating the eccentric screw pump is also disclosed.
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公开(公告)号：US12110892B2
公开(公告)日：2024-10-08
申请号：US18041414
申请日：2021-08-20
CPC分类号： F04C2/1075 , F04C13/008 , F04C2230/60 , F05C2225/02
摘要： A technique facilitates efficient well production in relatively low volume applications, e.g. applications after well pressure and volume taper off for a given well. According to an embodiment, use of an electric submersible progressive cavity pump is enabled in harsh, high temperature downhole environments. A pump stator facilitates long-term use in such harsh environments by providing a composite structure having an outer housing and a thermoset resin layer located within the outer housing and secured to the outer housing. The thermoset resin layer is constructed with an internal surface having an internal thread design. Additionally, an elastomeric layer is located within the thermoset resin layer and has a shape which follows the internal thread. In this manner, the elastomeric layer is able to provide an interior surface generally matching the shape of the internal thread of the thermoset resin layer and arranged for interaction with a corresponding pump rotor.
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公开(公告)号：US20240280099A1
公开(公告)日：2024-08-22
申请号：US18639036
申请日：2024-04-18
IPC分类号： F04C2/107 , F01C1/04 , F01C1/10 , F01C1/22 , F01C21/10 , F02B53/00 , F04C2/22 , F04C3/00 , F04C18/48 , F04C27/00 , H02K21/28
CPC分类号： F04C2/1073 , F01C1/04 , F01C1/104 , F01C1/22 , F04C2/22 , F04C3/00 , F04C18/48 , F01C21/106 , F02B2053/005 , F02B2730/018 , F04C27/008 , F04C2240/10 , F04C2240/20 , F04C2250/20 , F04C2250/30 , H02K21/28
摘要： Sealing in rotary positive displacement machines based on trochoidal geometry that comprise a helical rotor that undergoes planetary motion within a helical stator is described. Seals can be mounted on the rotor, the stator, or both. The rotor can have a hypotrochoidal cross-section, with the corresponding stator cavity profile being the outer envelope of the rotor as it undergoes planetary motion, or the stator cavity can have an epitrochoidal cross-section with the corresponding rotor profile being the inner envelope of the trochoid as it undergoes planetary motion. In some embodiments, the geometry is offset in a manner that provides advantages with respect to sealing in the rotary machine. In multi-stage embodiments, the rotor-stator geometry remains substantially constant or varies along the axis of the rotary machine.
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公开(公告)号：US20240167475A1
公开(公告)日：2024-05-23
申请号：US18427549
申请日：2024-01-30
CPC分类号： F04C29/00 , B29C70/62 , C08K7/02 , F03C2/08 , F04C2/1075 , C08L2205/16 , F05C2225/02 , F05C2253/04
摘要： A rubber compound for use in a stator. The rubber compound includes a fiber reinforcement, which may include fibrillated fibers in some embodiments, and short chop fibers in others. Fibers in the fiber reinforcement create a grain direction. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In embodiments, the fiber reinforcement may include a fiber loading of greater than 1.0 phr of fibers. In embodiments, the rubber compound may have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain. In embodiments, at least some of the fibers may have a Modulus greater than 2.0 GPa.
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公开(公告)号：US20240125321A1
公开(公告)日：2024-04-18
申请号：US17641768
申请日：2020-06-29
申请人： HEISHIN Ltd.
发明人： Nobuhisa SUHARA , Takashi SATO
CPC分类号： F04C2/1073 , F01C21/102 , F04C15/0046 , F04C2240/10 , F04C2240/20
摘要： A uniaxial eccentric screw pump includes: a stator 8 having a through hole 8a whose inner surface is formed in a female screw shape; a rotor 14 that is a male screw shaft body inserted into the through hole 8a of the stator 8; a plurality of shims 9 that are arranged on a radially outside of the stator 8 in a range from one end to the other end of the stator 8, are in surface contact with an outer surface of the stator 8, are capable of compressing the stator 8 by moving radially inward with respect to the stator 8, and have, on an outer surface, an inclined surface 18 gradually inclined radially inward or outward toward one end; and an adjustment member 10 that is movable in an axial direction with respect to the stator 8 and has a pressing part 26 that can press the inclined surface 18 of each of the shims 9.
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公开(公告)号：US20240093685A1
公开(公告)日：2024-03-21
申请号：US18470439
申请日：2023-09-20
申请人： PROTEC CO,. LTD.
发明人： KEON HEE KIM , HWAN SEONG PARK
CPC分类号： F04C2/107 , F04C13/002 , F04C14/22 , F04C2240/30 , F04C2240/806
摘要： Provided is a progressive cavity pump. The progressive cavity pump operates such that a viscous liquid is discharged by rotating an eccentric rotor with respect to a stator. The progressive cavity pump may be easily disassembled for repair and maintenance, and may be easily attached to an accurate position during re-assembly. Also, in the progressive cavity pump, main components such as a nozzle, a rotor, a stator, etc. may be easily replaced so as to easily adjust dispensing characteristic, while the driving units such as a motor and a rotary shaft are installed in a dispenser, and thus, an idle time of the dispenser may be reduced.
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公开(公告)号：US11913312B2
公开(公告)日：2024-02-27
申请号：US17312948
申请日：2019-10-29
发明人： Haiyang Liang , Guang Zhou , Xuelei Sun , Xueling Sun , Zhihai Zhang
CPC分类号： E21B43/126 , E21B47/008 , F04B15/02 , F04C2/107 , F04C14/08 , F04C14/28
摘要： An intelligent oil extraction system using an all-metal screw pump includes: the all-metal screw pump, an oil collecting unit (43), and a steam generating unit (45); wherein an internal threaded curve surface and an external threaded curve surface of the all-metal screw pump are both tapered spiral structures with equal tapers; the oil extraction system comprises a lifting mechanism and monitoring and control mechanism; the monitoring and control mechanism comprises: a controller (34), a torque sensor (35), a flow sensor (36), a pressure sensor (39), a liquid level detector (38), and a backup power source (37); the controller (34) is electrically connected to the torque sensor (35), the flow sensor (36), the pressure sensor (39), the liquid level detector (38), the backup power source (37), a drive motor (48), a servo motor (33), a first valve and a second valve.
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公开(公告)号：US20230400021A1
公开(公告)日：2023-12-14
申请号：US18359153
申请日：2023-07-26
申请人： REE AUTOMOTIVE LTD
CPC分类号： F04C2/1073 , B60T13/16
摘要： A hydraulic pump may include: a screw including: an internal tubular cavity, and an internal port in fluid communication with the internal tubular cavity; a nut surrounding a longitudinal portion of the screw; and a cylindrical tube fitting within the internal tubular cavity of the screw, the cylindrical tube having a hollow channel that is in fluid communication with the internal tubular cavity of the screw.
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公开(公告)号：US20230265848A1
公开(公告)日：2023-08-24
申请号：US18044983
申请日：2022-01-19
发明人： Kazumasa Ikushima
CPC分类号： F04C15/0065 , B05C5/0225 , B05C5/025 , F04C2/107
摘要： Problem: To provide a fluid transfer device that can solve an issue of pulsation that occurs when a liquid material is discharged from a nozzle by eccentrically rotating a male-screw-shaped rotor within a stator having a female-screw-shaped insertion hole, an application device including the fluid transfer device, and an application method.
Solution: A fluid transfer device 1 includes: an outer cylinder 10; a stator 11 that has a female-screw-shaped insertion hole 12 as a through-hole and is provided on an inner periphery of the outer cylinder; and a male-screw-shaped rotor 20 that is connected to a rotor driving part and eccentrically rotates in contact with an inner periphery of the stator. In the fluid transfer device 1 capable of transferring a fluid in a transport path formed by the stator 11 and the rotor 20, by rotating the rotor 20 inserted through the insertion hole 12, contact force with the rotor 20 at an inlet portion and an outlet portion of the stator 11 is smaller than contact force with the rotor 20 at a central portion of the stator 11.-
公开(公告)号：US20230258177A1
公开(公告)日：2023-08-17
申请号：US18094427
申请日：2023-01-09
CPC分类号： F04C2/1075 , F04C15/0019 , F04C2270/12
摘要： A sealing assembly for a progressive cavity pump and a progressive cavity pump assembly having a retaining sleeve, a ring, and an elastic diaphragm terminating in a first end of the diaphragm in a first opening, and in a second end of the diaphragm, opposite the first end, in a second opening larger than the first opening. The second opening is held in contact with the retaining sleeve by the ring, and the first opening is configured to grip a rotor of the progressive cavity pump, and the ring is configured to hold the second opening fixed with respect to a stator of the progressive cavity pump.
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