公开(公告)号：US11746786B2

公开(公告)日：2023-09-05

申请号：US17438170

申请日：2020-03-10

申请人： LEYBOLD FRANCE S.A.S.

发明人： Patrick Fournier

IPC分类号： F04C27/02 ,  F04C25/02 ,  F04C29/02 ,  B01D45/14 ,  B01D46/00

CPC分类号： F04C27/02 ,  B01D45/14 ,  F04C25/02 ,  F04C29/026 ,  B01D46/00 ,  F04C2230/70 ,  F04C2230/85

摘要： A lubricant receptacle for a vacuum pump is provided. The lubricant receptacle comprises a lubricant reservoir, a lubricant separator and an exhaust. A first gas connection is provided between a gas outlet of the lubricant reservoir and a gas inlet of the lubricant separator. For connecting a gas inlet of the lubricant reservoir with the vacuum pump, a second gas connection is provided, while a first lubricant connection is provided for connecting a lubricant outlet of the lubricant reservoir with the vacuum pump. Further, another lubricant connection is provided between a lubricant outlet of the lubricant separator and the lubricant outlet of the lubricant reservoir and/or an additional lubricant connection for connecting the lubricant outlet of the lubricant separator with the vacuum pump is provided. At least one of the gas connections and one of the lubricant connections is selectively coupleable. Furthermore, a vacuum pump system having such a lubricant receptacle and a vacuum pump is provided.

公开(公告)号：US11725662B2

公开(公告)日：2023-08-15

申请号：US16868460

申请日：2020-05-06

申请人： Ateliers Busch SA

发明人： Didier Müller ,  Jean-Eric Larcher ,  Théodore Iltchev

IPC分类号： F04C28/24 ,  F04C28/02 ,  F04C25/02 ,  F04C14/22 ,  F04C14/24 ,  F04C14/28 ,  F04C23/00 ,  F04C18/344 ,  F04C18/34 ,  F04C29/00 ,  F04C29/02 ,  F04C29/12 ,  F04C28/06

CPC分类号： F04C28/24 ,  F04C18/34 ,  F04C18/344 ,  F04C23/001 ,  F04C25/02 ,  F04C28/02 ,  F04C29/0085 ,  F04C29/026 ,  F04C29/126 ,  F04C28/06 ,  F04C2240/30 ,  F04C2240/40 ,  F04C2270/185

摘要： A pumping method in a pumping system comprises: a main vacuum pump with a gas inlet port connected to a vacuum chamber and a gas outlet port leading into a conduit before coming out into the gas outlet of the pumping system, a non-return valve positioned in the conduit between the gas outlet port and the gas outlet, and an auxiliary vacuum pump connected in parallel to the non-return valve. The main vacuum pump is activated in order to pump the gases contained in the vacuum chamber through the gas outlet port, simultaneously the auxiliary vacuum pump is activated and continues to operate all the while that the main vacuum pump pumps the gases contained in the vacuum chamber and/or all the while that the main vacuum pump maintains a defined pressure in the vacuum chamber. Also included is a pumping system.

公开(公告)号：US11725659B2

公开(公告)日：2023-08-15

申请号：US17619394

申请日：2020-05-15

申请人： PFEIFFER VACUUM

发明人： Paul Decorde ,  Yannick Grenier

IPC分类号： F04C23/00 ,  F04C18/16 ,  F04C25/02

CPC分类号： F04C23/001 ,  F04C18/16 ,  F04C25/02

摘要： A dry-type primary vacuum pump includes an injection device to distribute a purging gas in the pumping stages. The injection device includes: a first pressure sensor arranged on a common portion of the distributor, a second pressure sensor arranged on each branch of the distributor, and a control unit to generate a pulse width modulation command signal for the control of the regulation valves independently of one another as a function of the pressure measurement differences between the first pressure sensor and the second pressure sensors.

公开(公告)号：US20230167824A1

公开(公告)日：2023-06-01

申请号：US17905998

申请日：2021-03-09

申请人： Atlas Copco Airpower N.V.

发明人： Simon Candries ,  Yun Shi

IPC分类号： F04C25/02 ,  F04B35/04 ,  F04B37/14 ,  F04B49/06 ,  F04C28/08 ,  F04D19/04 ,  F04D27/00 ,  F04D27/02

CPC分类号： F04C25/02 ,  F04B35/04 ,  F04B37/14 ,  F04B49/065 ,  F04C28/08 ,  F04D19/04 ,  F04D27/001 ,  F04D27/004 ,  F04D27/0261 ,  F04B2203/0209 ,  F04C2270/23 ,  F05D2270/3011

摘要： Repeated cycles each consist of a pump down phase and a holding phase, wherein a start timepoint of each cycle is the timepoint when a rise in an inlet pressure of the pump is sufficiently large and the time extending between two consecutive cycle start timepoints is a cycle time. A control method includes determining a start of a next cycle during a present cycle, wherein it is preferable that the present cycle directly precedes the next cycle. The method further includes controlling the pump to accelerate to a maximum allowed speed during the holding phase of the present cycle before the start of the next cycle such that at the start of the next cycle full pump capacity is available.

公开(公告)号：US20230167822A1

公开(公告)日：2023-06-01

申请号：US18161906

申请日：2023-01-31

申请人： Raymond Zhou Shaw ,  JIAN WEI ZHANG ,  Xiaoqing Pan

发明人： Raymond Zhou Shaw ,  JIAN WEI ZHANG ,  Xiaoqing Pan

IPC分类号： F04C18/12 ,  F04C25/02 ,  F04C23/00 ,  H02K9/04

CPC分类号： F04C18/126 ,  F04C25/02 ,  F04C23/001 ,  H02K9/04 ,  F04C2210/221 ,  F04C2220/10 ,  F28B11/00

摘要： A vacuum system having a condenser and a root vacuum pump set includes an independent inlet condenser set having an inlet end for receiving vapor inputted from an output of an air cooling power generator condenser of a generator; air in the vapor being condensed, and the surplus air is outputted; a root vacuum pump set including a plurality of root vacuum pumps; the root vacuum pump set further including an input end and an output end; the input end being connected to the independent inlet condenser set; air outputted from the independent inlet condenser set being inputted to the plurality of root vacuum pump for compression and then the compressed air being outputted from the output end; and a backing pump connected to the output end of the root vacuum pump set by using an output pipe; the backing pump serving to receive air outputted from the root vacuum pump set.

公开(公告)号：US20230003208A1

公开(公告)日：2023-01-05

申请号：US17781515

申请日：2019-12-04

申请人： Ateliers Busch SA

发明人： Paul Alers ,  Jeihong Kim ,  Jean-Eric Larcher

IPC分类号： F04B41/06 ,  F04B37/14 ,  F04C18/12 ,  F04C18/16 ,  F04C23/00 ,  F04C25/02 ,  F04C28/02

摘要： The present invention relates to a redundant vacuum pumping system (300) and a pumping method using this system, comprising a primary roots pump (302), a first pumping sub-system (310) and a second pumping sub-system (320), wherein the first pumping sub-system (310) and the second pumping sub-system (320) are arranged to pump in parallel the gas evacuated by the primary roots pump (302), the first pumping sub-system (310) comprising a first secondary roots pump (311) and a first positive displacement pump (312) and a first valve (313) positioned between the gas discharge outlet (302b) of the primary roots pump (302) and the gas suction inlet (311a) of the first secondary roots pump (311), and the second pumping sub-system (320) comprising a second secondary roots pump (311) and a second positive displacement pump (312) and a second valve (323) positioned between the gas discharge outlet (302b) of the primary roots pump (302) and the gas suction inlet (321a) of the second secondary roots pump (321). According to the invention, the first pumping sub-system (310) and the second pumping sub-system (320) are configured to pump at a same flow rate, and the primary roots pump (302) is configured to be able to pump at a flow rate F equal to the pumping flow rate of the primary pumping sub-system (310) plus the pumping flow rate of the secondary pumping sub-system (320).

公开(公告)号：US11542943B2

公开(公告)日：2023-01-03

申请号：US16979850

申请日：2019-03-14

申请人： Edwards Technologies Vacuum Engineering (Qingdao), Co. Ltd.

发明人： Andries Daniel Jozef De Bock ,  Mark Gordon Glaister

IPC分类号： F04C19/00 ,  F04C29/04 ,  F04C25/02

摘要： A liquid ring pump manifold comprising at least one integrated spray nozzle, the at least one integrated spray nozzle being configured to spray a liquid into the liquid ring pump manifold. The liquid ring pump manifold may comprise at least one socket in which the at least one integrated spray nozzle is accommodated. The at least one socket may be integrally formed with the liquid ring pump manifold.

公开(公告)号：US11530694B2

公开(公告)日：2022-12-20

申请号：US16762044

申请日：2018-11-09

申请人： Edwards Limited

发明人： Hammond Deo ,  Helen Shaw ,  Craig Leonard Sands

IPC分类号： F04B37/14 ,  F04C25/02 ,  F04B39/14 ,  F04C23/00 ,  F04B41/00 ,  F04B39/12 ,  F16L51/04 ,  F16L53/35 ,  F16L23/08 ,  C23C16/44

摘要： A module for a vacuum pumping and/or abatement system includes a top side, a bottom side, a front side, a rear side, and two opposing lateral sides, which together define a space. The module comprises an apparatus located wholly within the space and one or more connection points coupled to the apparatus. Each of the connection points is for receiving an input for the apparatus or receiving an output from the apparatus. The one or more connection points are located at the top side. The module has a maximum size in a first system dimension that is equal to a first integer multiple of a fixed system value, the first system dimension being a dimension between the lateral sides. For each connection point, a distance between that connection point and each lateral side in the first system dimension is a respective second integer multiple of the fixed system value.

公开(公告)号：US20220268279A1

公开(公告)日：2022-08-25

申请号：US17622041

申请日：2019-08-02

申请人： FRUVAC LTD.

发明人： Khurram Akhtar ,  Christopher White

IPC分类号： F04C18/16 ,  F04C29/04 ,  F04C25/02 ,  F04C28/24

摘要： The present invention relates to rotary screw positive displacement machines used as a vacuum pump wherein additional intake air is provided allowing cooling to the invention which permits extended operation at extreme vacuum pressure. The rotary screw nature of the vacuum pump allows operation without additional lubrication with the additional intake air ensuring that thermal expansion will not disrupt the tight tolerances of the invention. The invention allows simultaneous operation as a vacuum pump and air compressor.

公开(公告)号：US11415133B2

公开(公告)日：2022-08-16

申请号：US16945254

申请日：2020-07-31

申请人： ZHONGSHAN TIANYUAN VACUUM EQUIPMENT TECHNOLOGY CO., LTD.

发明人： Dongsheng Ding ,  Weiguo Ren ,  Yiwen Ma

IPC分类号： F04C18/12 ,  F04C25/02 ,  F04C29/00 ,  F04C23/00 ,  F04C23/02 ,  F04C28/02

摘要： A multi-stage dry Roots vacuum pump, including a pump body, multi-stage Roots working units and a plurality of drive components. The pump body is provided with a plurality of independent working chambers, and airflow channels communicating the various working chambers; the airflow channels are communicated with outside; the Roots working units of each stage include driving Roots rotors and driven Roots rotors; the driving Roots rotors and driven Roots rotors are positioned in the working chambers; and the various drive components are respectively used for driving the driving Roots rotors and driven Roots rotors positioned in the various working chambers to rotate towards opposite directions at the same rotating speed. The Roots working units of various stages may be randomly distributed at various positions of the pump body on premise of ensuring that the airflow channels can communicate the working chambers of each stage.