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公开(公告)号：US20230392598A1
公开(公告)日：2023-12-07
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
IPC分类号： F04C18/16
CPC分类号： F04C18/16 , F04C2240/30 , F04C2250/20 , F04C2240/20
摘要： In a screw compressor, a lobe profile of cross-sections perpendicular to the axial direction in a female rotor that rotates about a second rotation center changes in the axial direction. One lobe of the lobe profile of the female rotor includes: a first contour line defining a leading flank on a rotation direction side of the female rotor with a lobe bottom as a boundary point; a second contour line defining a trailing flank on an opposite side of the rotation direction; and a third contour line defining a lobe tip having both endpoints at which the female has the maximum radius. In the lobe profile of the female rotor, when a first angle, a second angle, and a third angle are respectively defined as an angle formed by two line segments linking a second rotation center as a vertex and both ends of the first contour line, an angle formed by two line segments linking the second rotation center and both ends of the second contour line, and an 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：US20210301822A1
公开(公告)日：2021-09-30
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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公开(公告)号：US20240141896A1
公开(公告)日：2024-05-02
申请号：US18278431
申请日：2022-03-02
CPC分类号： F04C18/16 , F04C23/001
摘要： A multi-stage screw compressor includes a plurality of stages of compressor bodies that compress a gas in sequence, and each stage of the plurality of 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 as 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：US20230332591A1
公开(公告)日：2023-10-19
申请号：US18020290
申请日：2021-08-16
发明人： Yuuji ITOU , Toshiaki YABE , Kohei SAKAI , Takashi NAKAJIMA
IPC分类号： F04B49/06
CPC分类号： F04B49/06
摘要： Provided is an air compressor that suppresses a rise in delivery temperature due to a change in atmospheric pressure, and consequently improves the life of parts. The air compressor 1 includes a motor 2, a compressor main body 3 driven by the motor 2 to compress air, a delivery pressure sensor 12 that senses a delivery pressure of the compressor main body 3, an atmospheric pressure sensor 13 that senses an atmospheric pressure, and a controller 15. The controller 15 compares the delivery pressure sensed by the delivery pressure sensor 12 with a set pressure, and performs operation control based on a result of the comparison. The controller 15 corrects the set pressure such that a ratio between the atmospheric pressure sensed by the atmospheric pressure sensor 13 and the set pressure becomes a set value set in advance.
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公开(公告)号：US20210156383A1
公开(公告)日：2021-05-27
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： F04C28/06 , F04B39/00 , F04B35/04 , F04B49/06 , F04B49/20 , F04B49/08 , F04B27/08 , F04C18/16 , F04C28/08 , F04C28/24
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：US20200166030A1
公开(公告)日：2020-05-28
申请号：US16712534
申请日：2019-12-12
发明人： Kouhei SAKAI , Toshiaki YABE
摘要： A bearing oil feeding amount is appropriately controlled with respect to specifications of a discharge pressure (bearing load) and a rotation speed. A gas compressor has: a compressor main body that compresses gas and has a rotor; a bearing for supporting the rotor onto a compressor main body casing; an oil case that stores a lubricating oil to be supplied to the bearing; a lubricating oil pipe through which the lubricating oil is circulated from the oil case to the bearing; an oil pump that pumps the lubricating oil from the oil case to the bearing via the lubricating oil pipe; a flow amount control means for adjusting an amount of lubricating oil that circulates through the lubricating oil pipe; an electric motor that supplies power to the rotor; an inverter that outputs a rotation frequency of the electric motor; a pressure sensor that detects the discharge pressure of the compressor main body; and a control unit that determines a lubricating oil supply amount to the bearing on the basis of the load on the bearing corresponding to the pressure detected by the pressure sensor and the rotation speed of the rotor corresponding to the rotation frequency output by the inverter, and that controls the flow amount control means on the basis of the lubricating oil supply amount.
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公开(公告)号：US20180291901A1
公开(公告)日：2018-10-11
申请号：US15761987
申请日：2015-11-13
发明人： Toshiaki YABE , Tomoo SUZUKI , Yuuji ITOU , Kohei SAKAI
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：US20170051743A1
公开(公告)日：2017-02-23
申请号：US15305373
申请日：2015-03-13
发明人： Kouhei SAKAI , Toshiaki YABE
摘要： A bearing oil feeding amount is appropriately controlled with respect to specifications of a discharge pressure (bearing load) and a rotation speed. A gas compressor has: a compressor main body that compresses gas and has a rotor; a bearing for supporting the rotor onto a compressor main body casing; an oil case that stores a lubricating oil to be supplied to the bearing; a lubricating oil pipe through which the lubricating oil is circulated from the oil case to the bearing; an oil pump that pumps the lubricating oil from the oil case to the bearing via the lubricating oil pipe; a flow amount control means for adjusting an amount of lubricating oil that circulates through the lubricating oil pipe; an electric motor that supplies power to the rotor; an inverter that outputs a rotation frequency of the electric motor; a pressure sensor that detects the discharge pressure of the compressor main body; and a control unit that determines a lubricating oil supply amount to the bearing on the basis of the load on the bearing corresponding to the pressure detected by the pressure sensor and the rotation speed of the rotor corresponding to the rotation frequency output by the inverter, and that controls the flow amount control means on the basis of the lubricating oil supply amount.
摘要翻译： 相对于排出压力（轴承负荷）和转速的规格，适当地控制轴承供油量。 气体压缩机具有：压缩气体并具有转子的压缩机主体; 用于将转子支撑在压缩机主体壳体上的轴承; 储存供给轴承的润滑油的油箱; 润滑油管，润滑油通过其从油箱循环到轴承; 油泵，通过润滑油管将润滑油从油箱泵送到轴承; 流量控制装置，用于调节通过润滑油管循环的润滑油的量; 向转子供电的电动机; 输出电动机的旋转频率的逆变器; 检测压缩机主体的排出压力的压力传感器; 以及控制单元，其基于与由压力传感器检测的压力相对应的轴承上的负载和对应于由逆变器输出的旋转频率的转子的转速来确定对轴承的润滑油供给量，以及 其基于润滑油供给量来控制流量控制单元。
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