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公开(公告)号：US12025129B2
公开(公告)日：2024-07-02
申请号：US17798832
申请日：2021-01-28
CPC分类号： F04C18/16 , F04C29/0007 , F04C29/02 , F04C29/04 , F04C29/042 , F04C2250/20
摘要： A liquid-supply-type screw compressor can suppress a rise in temperature of a liquid while reducing work for stirring the liquid. The compressor has male and female rotors, male- and female-rotor-side working chambers formed at grooves of the male and female rotors, respectively. The compressor also has a liquid supply nozzle arranged on one side in the rotor axial direction which is a low-pressure side of an intersection at which a high-pressure-side cusp intersects a ridge line of a trailing lobe tip of the female rotor that defines a female-rotor-side working chamber, the nozzle supplying liquid to the male-rotor-side working chamber; and a liquid-supply nozzle arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the nozzle is made greater than the amount of the other liquid-supply nozzle.
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公开(公告)号：US11415134B2
公开(公告)日：2022-08-16
申请号：US16981128
申请日：2019-03-14
发明人： Yuuji Itou , Tomoo Suzuki , Masayuki Kasahara , Hiroshi Horiuchi
摘要： The invention prevents a decrease in strength of a screw rotor including a hollow portion and improves cooling performance. There is provided a screw rotor having a helical tooth on an outer periphery, the helical tooth extending by a predetermined length in an axial direction, in which a radial cross section of the screw rotor includes a cross section of a tooth portion, a cross section of an axial portion, a cross section of a support portion connected to an axial side of a tooth bottom or a tooth tip in the cross section of the tooth portion and an outer diameter side of the axial portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial side inner surface of the tooth bottom or the tooth tip, and an axial longitudinal cross section of the screw rotor is a cross section in which the axial portion, the support portion, the axial side of the tooth bottom or the tooth tip, and an axial end portion of the screw rotor are continuously connected to each other as an integral structure by a three-dimensional fabrication method or the like.
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公开(公告)号：US11293435B2
公开(公告)日：2022-04-05
申请号：US16326838
申请日：2017-08-08
申请人： Leybold GmbH
摘要： A vacuum pump screw rotor, comprising at least two helical displacer elements on a rotor shaft. The at least two displacer elements have different pitches, but the pitches of each displacer element are constant. Furthermore, the displacer elements each have a helical recess, each having a contour that remains the same over its entire length. Hereby, a suction-side displacer element has a recess having an asymmetric contour, and a pressure-side displacer element has a recess having a symmetrical contour.
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公开(公告)号：US11293433B2
公开(公告)日：2022-04-05
申请号：US16626443
申请日：2018-06-18
发明人： Johannes Deichmann , Tim Gonnermann , Marc Völker
IPC分类号： F01C1/16 , F03C2/00 , F03C4/00 , F04C18/00 , F04C2/16 , F04C11/00 , F01C21/02 , F01C21/10 , F04C2/08 , F04C15/00
摘要： A screw-spindle pump comprising: first and second screw spindles forming running and drive spindles, respectively, and a pump housing configured to receive the first and second screw spindles. The first and second screw spindles form, with at least the pump housing, delivery chambers, moving from a suction side to a pressure side of the pump as a consequence due to rotation of the screw spindles. The pump housing has an elongate insert, as an abutment for the first and second screw spindles and against which the first and second screw spindles are supported, the elongate insert having a first portion forming a first abutment for the second screw spindle and a second portion forming a second abutment for the first screw spindle. The elongate insert is clamped into a receptacle of the pump housing using a cross-sectional dimension of the elongate insert.
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公开(公告)号：US11225965B2
公开(公告)日：2022-01-18
申请号：US16980499
申请日：2019-03-14
发明人： Hiroshi Horiuchi
摘要： The invention reduces a pressure or thermal effect while reducing the mass of a screw rotor. There is provided a screw rotor having a helical tooth on an outer periphery, the helical tooth extending by a predetermined length in an axial direction, in which a radial cross section of the screw rotor includes a lobe portion having a predetermined thickness in a direction toward an axis and forming the helical tooth, and a hollow portion extending from an axial side inner surface of the lobe portion toward an axial side, and the predetermined thickness of the lobe portion differs between a high load side on the outer periphery of the screw rotor and a low load side on the outer periphery.
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公开(公告)号：US11149734B2
公开(公告)日：2021-10-19
申请号：US16323595
申请日：2017-08-22
发明人： Kotaro Chiba , Masahiko Takano , Toshikazu Harashima , Kosuke Sadakata , Kentaro Yamamoto , Takeshi Tsuchiya , Masanao Kotani , Ryoji Kawai , Minako Kanada
摘要： Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.
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公开(公告)号：US10895259B2
公开(公告)日：2021-01-19
申请号：US15958858
申请日：2018-04-20
发明人： Alberto Scala
摘要： This disclosure relates generally to economized screw compressors. Particularly, this synchronized economizer ports on both the female and the male rotor sides of a compressor housing. The economizer ports simultaneously provide gas to a compression chamber formed by male and female rotors. The synchronized male side and female side economizer ports are configured to open and close at opening and closing angles, respectively. The opening angles and the closing angles each differ by at most half of an angular width of a male lobe of the compressor.
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公开(公告)号：US10590930B2
公开(公告)日：2020-03-17
申请号：US15527088
申请日：2015-11-19
申请人： ITT Bornemann GmbH
摘要： The application relates to a system for conveying a medium having not less than two working machines (2, 2a, 2b, 2c) that each have not less than one carrier shaft (25, 35) with transport elements (22, 32) for the medium to be conveyed arranged on them, and not less than one drive (3, 3a, 3b, 3c) that sets the respective carrier shaft (25, 35) in rotation, with multiple working machines (2, 2a, 2b, 2c) connected in series, so that the medium is conveyed to a working machine (2, 2a, 2b, 2c) arranged downstream, and so that a separate drive (3, 3a, 3b, 3c) is assigned to each of the working machines (2, 2a, 2b, 2c) and that the drives (3, 3a, 3b, 3c) are connected in parallel with each other and connected to a common power supply system (5).
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公开(公告)号：US10184473B1
公开(公告)日：2019-01-22
申请号：US15255617
申请日：2016-09-02
申请人： Jerald G. Wagner , David R. Markham
发明人： Jerald G. Wagner , David R. Markham
摘要： A rotary device has at least one seal arrangement between inner and outer components to constrain fluid flow there between. The seal arrangement has a smooth surface and an opposing surface with a plurality of grooves and lands along a length of the at least one seal with the lands are separated from the smooth surface by a predetermined gap. The grooves have a bottom surface substantially parallel to the smooth surface. The width of the lands is between about 125% to 145% of the width of the grooves. The groove depth is between about 30% to 50% of the width of the grooves. A corner radius between the bottom surface of the grooves and side walls of the grooves is between about 25% to 100% of the depth of the grooves.
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90.发明授权公开(公告)号：US10024196B2
公开(公告)日：2018-07-17
申请号：US14008058
申请日：2012-04-12
摘要： The invention relates to a method for lubricating an expansion machine (30) in a thermodynamic cycle device, wherein the thermodynamic cycle device comprises the expansion machine, a feed pump (50), a lubricant separator (10) and a working medium containing a lubricant, and wherein the method comprises the following steps: The working medium is subjected to pressure by means of the feed pump. The pressurized working medium is delivered by the feed pump to the lubricant separator. At least part of the lubricant is separated from the working medium by means of the lubricant separator. At least part of the separated lubricant is delivered by the lubricant separator to the expansion machine. The invention further relates to a thermodynamic cycle device comprising a working medium that contains a working fluid and a lubricant, an expansion machine, a feed pump for subjecting the working medium to pressure, and a lubricant separator for separating at least part of the lubricant from the working medium, wherein the cycle device is designed to deliver at least part of the separated lubricant from the lubricant separator to the expansion machine.
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