公开(公告)号：US12049894B2

公开(公告)日：2024-07-30

申请号：US17771311

申请日：2020-10-09

申请人： Edwards Limited

发明人： Paul Milner ,  David Roy Hayler ,  Phillip North

IPC分类号： F04C27/00 ,  F01C1/12 ,  F01C19/00 ,  F04C18/12 ,  F04C23/00 ,  F04C25/02 ,  F04C29/12 ,  F04C18/08 ,  F04C29/00

CPC分类号： F04C27/008 ,  F04C18/126 ,  F04C23/001 ,  F04C29/12 ,  F01C1/126 ,  F01C19/005 ,  F04C18/08 ,  F04C18/088 ,  F04C23/00 ,  F04C23/003 ,  F04C25/02 ,  F04C27/00 ,  F04C29/0007 ,  F04C2220/10 ,  F04C2240/10

摘要： Aspects of the present invention relate to a stator component for a pump housing. The stator component has a plurality of fluid inlet channels for conveying fluid to respective pumping chambers. The fluid inlet channels each have an inlet port for conveying fluid into the pumping chamber. A plurality of fluid transfer channels are provided for conveying fluid to a respective one of the fluid inlet channels. The fluid transfer channels each have an inlet for receiving pumped fluid. The stator component is adapted to receive at least one sealing member for inhibiting the conveyance of fluid into an associated one of the pumping chambers. Aspects of the present invention relate to a pump housing, a cover plate and a pump. Aspects of the present invention also relate to a method of converting a stator component.

公开(公告)号：US20240175436A1

公开(公告)日：2024-05-30

申请号：US18501260

申请日：2023-11-03

申请人： Kaeser Kompressoren SE

发明人： Gerald Weih

IPC分类号： F04C18/08 ,  F04C18/16 ,  F04C18/20

CPC分类号： F04C18/084 ,  F04C18/16 ,  F04C18/20 ,  F04C2240/20 ,  F04C2240/30 ,  F04C2240/60

摘要： The invention relates to a rotor pair for a compressor block of a screw machine, wherein the rotor pair comprises a secondary rotor that rotates about a first axis and a main rotor that rotates about a second axis, wherein the number of teeth of the main rotor is 3 and the number of teeth of the secondary rotor is 4. The relative profile depth of the secondary rotor is at least 0.5, preferably at least 0.515, and at most 0.65, preferably at most 0.595. rk1 is an addendum circle radius drawn around the outer circumference of the secondary rotor and rf1 is a dedendum circle radius starting at the profile base of the secondary rotor, wherein the ratio of the axis distance of the first axis from the second axis and the addendum circle radius rk1 is at least 1.636, and at most 1.8, preferably at most 1.733.

公开(公告)号：US11905954B2

公开(公告)日：2024-02-20

申请号：US17546556

申请日：2021-12-09

申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ,  NOK CORPORATION

发明人： Tatsushi Mori ,  Shintaro Kashiwa ,  Daisuke Masaki ,  Kenichi Yoshimura

IPC分类号： F04C18/12 ,  F04C15/00 ,  F04C2/08 ,  F04C27/00 ,  F04C28/24 ,  F04C18/08 ,  F04C29/00 ,  F04C29/02 ,  F04C18/16 ,  F04C25/02 ,  F01C1/12 ,  F01C19/00 ,  F01C1/08

CPC分类号： F04C18/126 ,  F01C1/084 ,  F01C1/126 ,  F01C19/005 ,  F04C2/084 ,  F04C15/0038 ,  F04C18/084 ,  F04C18/086 ,  F04C18/16 ,  F04C25/02 ,  F04C27/00 ,  F04C27/009 ,  F04C28/24 ,  F04C29/005 ,  F04C29/02 ,  F04C2240/30 ,  F04C2240/40 ,  F04C2240/60

摘要： An electric pump includes a housing that includes a gear chamber, a rotor chamber, and a motor chamber. The electric pump includes a first seal member, a second seal member, and a third seal member. The first seal member seals a space between the gear chamber and the rotor chamber. The second seal member seals the space between the gear chamber and the rotor chamber. The third seal member seals a space between the gear chamber and the motor chamber. The third seal member seals the space between the gear chamber and the motor chamber to a lesser extent than the first seal member and the second seal member seal the space between the gear chamber and the rotor chamber.

公开(公告)号：US11867183B2

公开(公告)日：2024-01-09

申请号：US16610539

申请日：2018-03-13

申请人： ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP

发明人： Linus Van Hove ,  Steven De Man

IPC分类号： F04C29/12 ,  F04C29/00 ,  F04C29/02 ,  F04C18/16 ,  F04B53/00 ,  F16H37/02 ,  F04C18/08

CPC分类号： F04C29/12 ,  F04B53/00 ,  F04C18/08 ,  F04C29/0042 ,  F04C29/026 ,  F16H37/02 ,  F04C2240/30

摘要： Transmission between drive shaft and a driven shaft, which transmission includes a housing and at least a driven gearwheel that is mounted on the driven shaft and a drive gearwheel that is mounted on a drive shaft. The housing is provided with an outlet opening, which outlet opening is placed in the radial extension of one of the gearwheels.

公开(公告)号：US20230272796A1

公开(公告)日：2023-08-31

申请号：US18172539

申请日：2023-02-22

申请人： MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION

发明人： Hiroyuki Miyata ,  Masahiro Kobayashi

IPC分类号： F04C18/08 ,  F04D17/12 ,  F04D29/66

CPC分类号： F04C18/084 ,  F04D17/12 ,  F04D29/666 ,  F05D2210/12 ,  F05D2260/96

摘要： A geared compressor includes a drive gear, a first intermediate gear, a second intermediate gear, a first impeller and a second impeller connected to a first driven gear, and a third impeller and a fourth impeller connected to a second driven gear. When viewed from an axial direction, a drive axis of the drive gear is disposed below a first intermediate axis of the first intermediate gear, a second intermediate axis of the second intermediate gear, a first driven axis of the first driven gear, and a second driven axis of the second driven gear in a vertical direction. The first impeller has a larger outer diameter than the second impeller, the third impeller, and the fourth impeller.

公开(公告)号：US11578723B2

公开(公告)日：2023-02-14

申请号：US16333376

申请日：2017-09-19

申请人： KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH

发明人： Gilles Hebrard ,  Jean-Baptiste Marescot ,  Joerg Mellar ,  Thomas Weinhold

IPC分类号： F04C18/16 ,  F04C18/08

摘要： A screw compressor for a utility vehicle has at least one female screw, at least one male screw that meshes with the female screw, and at least one screw compressor drive which drives the female screw.

公开(公告)号：US11248607B2

公开(公告)日：2022-02-15

申请号：US16478342

申请日：2018-01-18

申请人： Edwards Limited

发明人： Michael Henry North

IPC分类号： F04C18/12 ,  F04C23/00 ,  F04C18/08 ,  F04C11/00 ,  F04C25/02

摘要： A rotor for a multi-stage vacuum pump, a multi-stage vacuum pump and a method. The rotor comprises: a plurality of rotary vanes, the plurality of rotary vanes being axially displaced and coaxially aligned; a pair of end shafts, each end shaft extending from opposing axial ends of the plurality of rotary vanes; and an inter-vane shaft extending between adjacent rotary vanes of the plurality of rotary vanes, the inter-vane shaft having a diameter which is greater than that of the end shafts. In this way, the inter-vane shaft provided between each rotary vane may have an increased diameter, which improves the stiffness of the shaft and changes the modal frequency of the rotor. Such a change in the modal frequency is typically sufficient to improve its operation.

公开(公告)号：US20210231122A1

公开(公告)日：2021-07-29

申请号：US17229331

申请日：2021-04-13

申请人： GARDNER DENVER, INC.

发明人： Luke Gray ,  Taylor Stratman ,  Bernard Conley ,  Brent Ransdell ,  Daniel Peana

IPC分类号： F04C18/08 ,  F04C18/16 ,  F04C18/20

摘要： A compressor desigi includes a male rotor (10) having one or more helical lobes (12) and a female rotor (14) having one or more helical grooves (16). The male rotor is mounted on a first shaft and the female rotor is mounted on a second shaft. The male rotor is positioned in a first section of a chamber and the female rotor is positioned in a second section of the chamber. Fluid enters the chamber at an inlet, and when the rotors are driven, the lobes of the male rotor fit into the grooves of the female rotor, causing compression and movement of the fluid towards an outlet or discharge end where the compressed fluid is discharged. The configuration of the lobe and groove helix, the lobe and groove profile, and the outer diameter of the rotors can be varied in different combinations to form different rotors.

公开(公告)号：US11009025B2

公开(公告)日：2021-05-18

申请号：US16094136

申请日：2017-03-30

申请人： Hitachi Industrial Equipment Systems Co., Ltd.

发明人： Hirotaka Kameya ,  Hideharu Tanaka ,  Masahiko Takano ,  Takeshi Tsuchiya

IPC分类号： F03C2/00 ,  F03C4/00 ,  F04C18/00 ,  F04C2/00 ,  F04C29/04 ,  F04C18/20 ,  F04C18/08 ,  F04C29/00 ,  F04C18/16

摘要： In an oil-cooled screw compressor, a tooth crest arc of a fixed width is provided to the tooth crest of a male tooth profile, and simultaneously a tooth bottom arc is provided to the tooth bottom of a female tooth profile. Due to the actions thereof, the operation chamber immediately before disappearing exists only in a bottom half region from a line that connects the centers of the male and female tooth profiles, and the opening area relative to the volume of the operation chamber can be increased. As a result, the discharge of oil becomes smooth and energy loss is reduced.

公开(公告)号：US10954935B2

公开(公告)日：2021-03-23

申请号：US16094391

申请日：2017-04-18

申请人： ClearMotion, Inc.

发明人： Colin Patrick O'Shea ,  Clive Tucker ,  Brian Alexander Selden

IPC分类号： F04B49/06 ,  F04B49/20 ,  F04B49/10 ,  F04C18/08 ,  F04C28/08

摘要： Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.