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公开(公告)号：US20210088044A1
公开(公告)日：2021-03-25
申请号：US16706691
申请日：2019-12-07
发明人： Yi Rong , Yue LI , Miaole SHEN
摘要： A driving structure of a three-axis multi-stage Roots pump comprises a pump body, wherein a gear end cover is mounted at one side of the pump body, an air outlet end moving bearing air sealing unit is mounted on the other side of the pump body, and the bearing end cover is mounted on the pump at the side of the pump body; a driving axis, a first driven axis and a second driven axis are further provided inside the pump body, and the driving axis is connected with the first driven axis and the second driven axis through the gear, respectively; and both ends of the driving axis, the first driven axis and the second driven axis are movably connected to an air inlet end gear mechanical seal driving unit and an air outlet end moving bearing air sealing unit, respectively. The present invention overcomes the deficiencies of the prior art, a fixed bearing limiting unit not only plays a radial supporting role, strengthens the rigidity of an independent axis, but also reduces the diameter of the axis, and at the same time, evenly distributes to the two axial ends in the axial deformation process, avoiding deformation in a single direction, reducing the amount of displacement by nearly half, and also improving the sealing efficiency of the system.
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公开(公告)号：US20190338777A1
公开(公告)日：2019-11-07
申请号：US16333560
申请日：2017-09-19
摘要： A screw compressor for a utility vehicle has an air filter with an intake port and an air supply channel for supplying air to the screws of the screw compressor. The intake port is arranged between the air filter and the air supply channel and includes a pocket groove which can maintain the oil.
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公开(公告)号：US11739753B1
公开(公告)日：2023-08-29
申请号：US17739236
申请日：2022-05-09
申请人： Yaode Yang
发明人： Yaode Yang
CPC分类号： F04C18/04 , F04B49/125 , F04B53/14 , F04C2/06 , F04C28/22
摘要： Described herein is a mechanism including: a driving shaft comprising an eccentric crank and an arm part extending radially from the driving shaft, the arm part of the driving shaft comprising a piston housing; a piston in the piston housing; an eccentric lever bushing comprising an arm part extending radially therefrom, a cylindrical outer surface and a cylindrical hole, wherein the cylindrical hole is rotatably attached to the eccentric crank, wherein an axis of the cylindrical hole and an axis of the cylindrical outer surface are parallel and offset; wherein the piston is configured to apply a torque on the eccentric lever bushing by pushing the arm part of the eccentric lever bushing. The driving shaft may further comprise a channel configured to apply fluid pressure on the piston. This mechanism may be used in a device such as a star scroll compressor.
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公开(公告)号：US20190338778A1
公开(公告)日：2019-11-07
申请号：US16333564
申请日：2017-09-19
摘要： A screw compressor system for a utility vehicle has at least one screw compressor, at least one screw compressor drive and at least one control and/or regulation unit. The control and/or regulation unit is connected to the screw compressor drive and is designed and configured such that it monitors, when the screw compressor is in operation, the ratio of idle time and switched on time of the screw compressor drive and this ratio controls and regulates to a predetermined range.
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公开(公告)号：US11713716B2
公开(公告)日：2023-08-01
申请号：US17403046
申请日：2021-08-16
发明人： Edward W. Goy , Weishun William Ni
CPC分类号： F02C7/22 , F04C2/06 , F05D2220/32
摘要： A fuel pump assembly for a gas turbine engine includes a shaft for transmitting motion, a gear connected to and coaxial with the shaft with the gear having a first wear surface, a first bearing coaxial with the shaft with the first bearing being configured to support the gear and having a second wear surface positioned to interact with the first wear surface, and a plurality of indents. The indents are distributed in the first wear surface or the second wear surface and at least two of the plurality of indents are partially aligned in a radial direction.
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公开(公告)号：US20230048163A1
公开(公告)日：2023-02-16
申请号：US17403046
申请日：2021-08-16
发明人： Edward W. Goy , Weishun William Ni
摘要： A fuel pump assembly for a gas turbine engine includes a shaft for transmitting motion, a gear connected to and coaxial with the shaft with the gear having a first wear surface, a first bearing coaxial with the shaft with the first bearing being configured to support the gear and having a second wear surface positioned to interact with the first wear surface, and a plurality of indents. The indents are distributed in the first wear surface or the second wear surface and at least two of the plurality of indents are partially aligned in a radial direction.
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公开(公告)号：US20190338768A1
公开(公告)日：2019-11-07
申请号：US16333508
申请日：2017-09-19
IPC分类号： F04C2/06
摘要： A method produces a housing of a rotary screw compressor, the housing having at least one housing body and at least one housing cover. The method includes the following steps: bearing seats for at least one screw rotor of the rotary screw compressor are provided in the housing body and in the housing cover; at least one screw borehole for the at least one screw rotor of the rotary screw compressor is provided in the housing body; the housing body and the housing cover are temporarily assembled using at least one alignment tool for ensuring the alignment of the screw rotor central axis with the central axes of the bearing seats and the screw borehole; and at least one bolt insertion opening is provided in both the housing body and the housing cover by at least one common production process.
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公开(公告)号：US1837714A
公开(公告)日：1931-12-22
申请号：US33954229
申请日：1929-02-13
申请人： SAMUEL E DETTELBACH
发明人： JAWOROWSKI JOSEPH F
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公开(公告)号：US11339783B2
公开(公告)日：2022-05-24
申请号：US16706693
申请日：2019-12-07
发明人： Yi Rong , Yue Li , Miaole Shen
摘要： A pump housing structure of a three-axis multi-stage Roots pump is provided, comprising a first-stage pump housing, a second-stage pump housing and a third-stage pump housing, wherein the first-stage pump housing is provided with a first center axial hole, a first left axial hole and a first right axial hole; a fixed bearing end cover is mounted on the side of the first-stage pump housing, three fixed bearing chambers are provided on the surface of the fixed bearing end cover; the second-stage pump housing is provided with a second center axial hole, a second left axial hole and a second right axial hole, the third-stage pump housing is provided with a third center axial hole, a third left axial hole and a third right axial hole, and the end surface at the outer side of the third-stage pump housing is fixedly mounted with a non-driving end bearing end cover. The present invention can accommodate and fix three axes through three fixed bearing chambers, respectively. Moreover, since the sum of the axial lengths of the second-stage pump housing and the third-stage pump housing is equal to the axial length of the first-stage pump housing, it not only can strengthen the center stiffness of the three axes of the Roots pump, but also can ensure that the total axial expansion is evenly divided, reducing the cumulated amount of thermal expansion at the end of the axis.
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