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公开(公告)号：US12078172B2
公开(公告)日：2024-09-03
申请号：US18278431
申请日：2022-03-02
CPC分类号： F04C23/001 , F04C18/08 , F04C18/084 , F04C18/16 , F25B1/047 , F04C2240/20 , F05B2260/4031
摘要： A multi-stage screw compressor includes a plurality of stages of compressor bodies that compress a gas in sequence. Each of the stages of compressor bodies has both male and female rotors that are housed revolvably in a casing in a mutually meshing state. The male and female rotors each include a rotor lobe section having a suction-side end face and a discharge-side end face on one end and the other end thereof in the axial direction and having a twisted lobe extending from the suction-side end face to the discharge-side end face. The male and female rotors in a downstream-stage compressor body of at least one certain stage, excluding an upstream-stage compressor body as the first stage, among the plurality of stages of compressor bodies are each configured such that their lead increases from the suction side in the axial direction of the rotor lobe section toward the discharge side.
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公开(公告)号：USD1048107S1
公开(公告)日：2024-10-22
申请号：US29784904
申请日：2021-05-21
设计人： Yuki Ishizuka , Yuuji Itou , Kazumasa Kanai , Toshiaki Yabe
摘要： FIG. 1 is a reduced front, top and right side perspective view of a compressor according to the design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is an enlarged cross-sectional view taken along line 8-8 of FIG. 2.
The broken lines illustrate portions of the compressor that form no part of the claimed design.-
公开(公告)号：US11773855B2
公开(公告)日：2023-10-03
申请号：US17168651
申请日：2021-02-05
发明人： Toshiaki Yabe , Tomoo Suzuki , Yuuji Itou , Kohei Sakai
IPC分类号： F04B39/00 , F04B35/04 , F04B49/06 , F04B49/20 , F04C28/06 , F04B49/08 , F04B27/08 , F04C18/16 , F04C28/08 , F04C28/24
CPC分类号： F04C28/06 , F04B27/08 , F04B35/04 , F04B39/0027 , F04B49/06 , F04B49/08 , F04B49/20 , F04C18/16 , F04C28/08 , F04C28/24 , F04C2240/403 , F04C2270/0525 , F04C2270/095 , F04C2270/185 , F04C2270/44
摘要： In order to reduce operation in a rotation-prohibited frequency range and to prevent resonance in a gas compressor wherein inverter control is performed, this gas compressor has: a compressor main body that compresses a gas; a motor that rotationally drives the compressor main body; an inverter that changes the rotational speed of the motor; a check valve arranged downstream from the compressor main body; a pressure detection means that detects load-side pressure downstream from the check valve; and a control device that, in accordance with the pressure detected by the pressure detection means, controls the frequency output by the inverter. The control device performs a control whereby compressed gas having a prescribed pressure is generated/maintained by increasing/decreasing the frequency, and when the frequency that generates the compressed gas having the prescribed pressure includes a specific frequency, the inverter's output frequency is increased or decreased when the pressure detected by the pressure detection means reaches a pressure corresponding to a frequency that has a more constant pressure width than the prescribed pressure and does not include the specific frequency.
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公开(公告)号：US12031536B2
公开(公告)日：2024-07-09
申请号：US18032494
申请日：2021-10-18
发明人： Takeshi Tsuchiya , Kotaro Chiba , Tomohiro Komatsu , Shota Tanimoto , Toshiaki Yabe , Shigeyuki Yorikane
CPC分类号： F04C18/16 , F04C18/126 , F04C18/14 , F04C2240/20 , F04C2240/30 , F04C2250/20
摘要： In a screw compressor, a lobe of a lobe profile of a female rotor includes: a first contour line defining a leading flank; a second contour line defining a trailing flank; and a third contour line defining a lobe tip having both endpoints at which the female has the maximum radius. In the lobe profile, when a first angle formed by two line segments linking a second rotation center as a vertex and both ends of the first contour line, a second angle formed by two line segments linking the second rotation center and both ends of the second contour line, and a third angle formed by two line segments linking the second rotation center and both ends of the third contour line, the third angle is greater on the delivery side in the axial direction, and the first angle is smaller on the delivery side in the axial direction.
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公开(公告)号：US11536270B2
公开(公告)日：2022-12-27
申请号：US17265630
申请日：2019-06-07
发明人： Tomoo Suzuki , Toshiaki Yabe , Yuuji Itou
摘要： A screw rotor which is hollow has improved performance against heat, pressure, rust, and the like. A screw rotor includes a screw portion of which an outer periphery has teeth and grooves having a helical shape and extending by a predetermined length in an axial direction. A radial cross section of at least a part of the screw portion includes a cross section of an outer surface portion forming the teeth and the grooves, a cross section of an axial center portion, a cross section of a support portion that connects an axial center side of the outer surface portion and an outer diameter side of the axial center 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 center side inner surface of a tooth bottom or a tooth tip. In at least the radial cross section of the screw portion, different members are continuously joined as an integral structure in a cross section of at least one of the axial center portion and the support portion and the outer surface portion.
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