US20210108639A1 - Roots rotor for removing dust coagulum and droplets - Google Patents

Roots rotor for removing dust coagulum and droplets Download PDF

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Publication number
US20210108639A1
US20210108639A1 US17/030,848 US202017030848A US2021108639A1 US 20210108639 A1 US20210108639 A1 US 20210108639A1 US 202017030848 A US202017030848 A US 202017030848A US 2021108639 A1 US2021108639 A1 US 2021108639A1
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US
United States
Prior art keywords
rotor
roots
slot scraping
coagulum
pump case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US17/030,848
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English (en)
Inventor
Yi Rong
Yue Li
Miaole Shen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duitong Vacuum Technology Shanghai Co Ltd
Original Assignee
Duitong Vacuum Technology Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duitong Vacuum Technology Shanghai Co Ltd filed Critical Duitong Vacuum Technology Shanghai Co Ltd
Assigned to OVG Vacuum Technology (Shanghai) Co., Ltd. reassignment OVG Vacuum Technology (Shanghai) Co., Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONG, YI, LI, YUE, Shen, Miaole
Publication of US20210108639A1 publication Critical patent/US20210108639A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/123—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/005—Axial sealings for working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion
    • F04C2280/02—Preventing solid deposits in pumps, e.g. in vacuum pumps with chemical vapour deposition [CVD] processes

Definitions

  • the utility model relates to the technical field of roots rotor, particularly to a roots rotor for removing dust coagulum and droplets.
  • Roots refers to a positive displace rotary pump installed two blade-shaped rotors synchronously rotating in opposite directions within the pump, with a small non-contacting clearance between the rotors, and between the rotor and the inner wall of the pump case.
  • the molded lines of the blade-shaped rotor of the roots pump are mainly based on the involute or cycloid.
  • the excircle of the rotor is a continuous arc, which is tangentially meshed with the wall of the pump case during rotation.
  • the utility model provides a rotor for removing dust coagulum and droplets, which overcomes the disadvantages of the prior art with reasonable design.
  • the attachment can be scraped off and gathered into the rotor slot scraping groove through the action of the scraper surface; and with the rotation of the rotor body, the particles and dust can be easily dropped outside the exhaust port of the pump; thus to achieve to avoid the accumulation of dust, coagulum and other incompressible medium in the process gas on the wall of the pump case.
  • a roots rotor for removing dust coagulum and droplets comprises a rotor body, which rotates inside the roots pump case. Both ends of the rotor body are sealing surfaces, which are meshed with the inner wall of the roots pump case.
  • the rotor slot scraping cavities are arranged on both sides of the sealing surface. The side of the rotor slot scraping cavity close to the sealing surface is set as the scraper surface, which forms a sharp edge with the sealing surface.
  • a guide surface is arranged on the surface of the rotor body, and the guide surface is located on the side of the rotor slot scraping cavity away from the sealing surface.
  • the bottom of the scraper surface ( 5 ) and that of the rotor slot scraping cavity ( 4 ) are circular arc transitions.
  • the inner surface of the rotor slot scraping cavity is a parabola structure.
  • the guide surfaces of the surfaces of two matched rotor bodies are meshed.
  • the utility model provides a roots rotor for removing dust coagulum and droplets. It has the following beneficial effects: when the attachments on the inner wall of the roots pump case contact with the scraper surface on the side of the rotor slot scraping cavity, due to the clearance reserved between the position of the scraper surface contacting with the attachments and the inner wall of roots pump case is very small, the attachment can be scraped off and gathered into the rotor slot scraping cavity under the action of the scraper surface; and with the rotation of the rotor body, the original attachments in the rotor slot scraping cavity will be thrown out by centrifugal action, dropping into the groove of two rotor body surfaces meshed, and with the rotation, the particles and dust will be very easy to drop outside the exhaust port of the pump; thus to achieve to avoid the accumulation of dust, coagulum and other incompressible medium in the process gas on the wall of the pump case.
  • FIG. 1 is a structure diagram of the utility model
  • FIG. 2 is a structure diagram of the utility model when in use
  • FIG. 3 is a plan view of the utility model
  • FIG. 4 is a partial enlarged drawing at position of A in FIG. 3 ;
  • a roots rotor for removing dust coagulum and droplets comprises a rotor body 1 , which rotates inside the roots pump case 2 . Both ends of the rotor body 1 are sealing surfaces, which are meshed with the inner wall of the roots pump case 2 .
  • the rotor slot scraping cavities 4 are arranged on both sides of the sealing surface 3 .
  • the side of the rotor slot scraping cavity 4 close to the sealing surface 3 is set as the scraper surface 5 , which forms a sharp edge with the sealing surface 3 .
  • a guide surface 6 is arranged on the surface of the rotor body 1 , and the guide surface 6 is located on the side of the rotor slot scraping cavity 4 away from the sealing surface 3 .
  • a pair of rotor bodies 1 are placed in the cavity of roots pump case 2 , and the roots rotor body 1 uses synchronous and counter rotating; when the rotor body 1 rotates and encounters liquid, dust and incompressible mediums on the inner wall of the roots pump case 2 , firstly, the guide surface 6 of the rotor body 1 contacts with the inner wall of the roots pump case 2 .
  • the scraper surface 5 is close to the sealing surface 3 of the rotor body 1 , the clearance between the position of the scraper surface 5 contacting with the attachment 7 and the inner wall of the Roots pump case 2 is very small, so that the attachment 7 can be scraped off and gathered to the rotor slot scraping cavity 4 ; with the rotation of the rotor body 1 , the scraper surface 5 leaves the area of the inner wall of the roots pump case 2 , the original particles or dust in the rotor slot scraping cavity 4 will be thrown out under centrifugal action, dropping into the groove of two rotor body surfaces meshed, and with the rotation, the particles and dust will be very easy to drop outside the exhaust port of the pump; thus to achieve to avoid the accumulation of dust, coagulum and other incompressible medium in the process gas on the wall of the pump case; the guide surface 6 is the involute or cycloid of the rotor body 1 , and the guide surfaces 6 on the surfaces of two matched rotor bodies 1 are meshed
  • the bottom of the scraper surface 5 and that of the rotor slot scraping cavity 4 are circular arc transitions.
  • the scraper surface 5 is a straight surface
  • the bottom of the rotor slot scraping cavity 4 is a plane, so that the angle between the scraper surface 5 and the bottom surface of the rotor slot scraping cavity 4 is 80°-88°; thus, it allows the scraper surface 5 to shovel and separate the attached dust, particles and incompressible mediums better; at the same time, through the arc transitions of the bottoms of the scraper surface 5 and rotor slot scraping cavity 4 , the shoveled and separated attachments from remaining in the clearance between scraper surface 5 and the rotor slot scraping cavity 4 .
  • the inner surface of the rotor slot scraping cavity 4 is a parabola structure.
  • the particles, dust or other attachments scraped off by the scraper surface 5 are gathered in the rotor slot scraping cavity 4 in a loose structure, and when the rotor body 1 rotates again, the particles and dust, etc. gathered in the rotor slot scraping cavity 4 can be smoothly thrown out along the parabola structure in the rotor slot scraping cavity 4 under centrifugal action.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US17/030,848 2019-10-10 2020-09-24 Roots rotor for removing dust coagulum and droplets Abandoned US20210108639A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921687927.1 2019-10-10
CN201921687927.1U CN210715095U (zh) 2019-10-10 2019-10-10 一种可去除粉尘凝固物和液滴的罗茨转子

Publications (1)

Publication Number Publication Date
US20210108639A1 true US20210108639A1 (en) 2021-04-15

Family

ID=70963390

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/030,848 Abandoned US20210108639A1 (en) 2019-10-10 2020-09-24 Roots rotor for removing dust coagulum and droplets

Country Status (3)

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US (1) US20210108639A1 (zh)
EP (1) EP3805562A1 (zh)
CN (1) CN210715095U (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236560A (zh) * 2021-05-18 2021-08-10 杰锋汽车动力系统股份有限公司 一种具有防止积水功能的氢气循环泵
CN116753167B (zh) * 2023-04-19 2024-04-02 北京通嘉宏瑞科技有限公司 转子及真空泵

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130167A (ja) * 2000-10-19 2002-05-09 Tochigi Fuji Ind Co Ltd 流体機械
JP2003161277A (ja) * 2001-11-28 2003-06-06 Aisin Seiki Co Ltd 多段ドライ真空ポンプ
GB0707753D0 (en) * 2007-04-23 2007-05-30 Boc Group Plc Vacuum pump
CN206111550U (zh) * 2016-10-14 2017-04-19 浙江真空设备集团有限公司 一种泵腔内壁自清洁的罗茨泵

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CN210715095U (zh) 2020-06-09
EP3805562A1 (en) 2021-04-14

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