CN2893231Y - Variable pitch screw vacuum pump - Google Patents

Variable pitch screw vacuum pump Download PDF

Info

Publication number
CN2893231Y
CN2893231Y CNU200520014921XU CN200520014921U CN2893231Y CN 2893231 Y CN2893231 Y CN 2893231Y CN U200520014921X U CNU200520014921X U CN U200520014921XU CN 200520014921 U CN200520014921 U CN 200520014921U CN 2893231 Y CN2893231 Y CN 2893231Y
Authority
CN
China
Prior art keywords
screw
vacuum pump
oil
pitch
screw rod
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.)
Expired - Fee Related
Application number
CNU200520014921XU
Other languages
Chinese (zh)
Inventor
陈海垚
梁伯顺
周法顺
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38061393&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN2893231(Y) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to CNU200520014921XU priority Critical patent/CN2893231Y/en
Application granted granted Critical
Publication of CN2893231Y publication Critical patent/CN2893231Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04C18/14—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 toothed rotary pistons
    • F04C18/16—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw 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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/90—Alloys not otherwise provided for
    • F05C2201/903—Aluminium alloy, e.g. AlCuMgPb F34,37

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The utility model relates to a varying pitch dry-type screw vacuum pump, which comprises a pump body with an air suction port and an air exhaust port. The electric motor is connected with a driving gear by a shaft, while a driving screw and a driven screw that are mutually joggled are arranged in the pump body. The driving gear that is arranged in the driving screw shaft is joggled with the driven gear that is arranged in the driven screw shaft, while the driving screw and the driven screw are all the varying pitch matching structure. The screw pitch is made into the decreasing varying pitch and the air inside the vacuum pump is continuously compressed, so the utility model can attain a better performance, a high vacuum degree, a large exhaust amount, a high reliability, a long service life and a wide applying field, which also can directly drain the air.

Description

The varying pitch screw vacuum pump
Technical field:
The utility model relates to pumping equipment, particularly a kind of variable pitch dry screw vacuum pump.
Background technique:
The constant lead screw vacuum pump have do not have oily, simple in structure, do not have advantages such as easily damaged parts, maintenance load is little, the life-span is long, but shortcomings such as the situation lower volume that have that consumed power is big, the exhaust pulsation is big, air displacement and compression ratio is identical is big, so the difficult screw vacuum pump that is used for condition of high vacuum degree and big discharge capacity of uniform pitch molded lines.
Summary of the invention:
The purpose of this utility model provides the screw vacuum pump that a kind of structure is simple relatively, pumping speed is big, degree of vacuum is high.
The utility model comprises the pump housing that is shaped on intakeport and relief opening, actuation gear is housed on the motor shaft, be provided with intermeshing active screw rod and passive screw rod in the pump housing, motor shaft be equipped with driving screw shaft on the actuation gear of gear engagement, be contained in driving gear and the driven gear engagement that is contained on the passive screw axis on the driving screw shaft, be characterised in that active screw rod and passive screw rod are the variable pitch cooperating structure.Described variable pitch be screw rod from front to back pitch dwindle gradually, the fine pitch back segment of screw rod is uniform pitch basically; Profile of tooth on the screw rod is rectangle basically, is different curves inside and outside the joint garden of profile of tooth.Screw axis is a hollow shaft, has and the hollow axial oil duct that communicates on every side the hollow of axle.The pump housing is provided with cover body outward, also is provided with oil cooling system in the cover body, and its oil circuit is the entry end that the oil outlet end of oil pump is communicated with oil cooler, and the outlet end of oil cooler is communicated with the cored screw axle, flows to bearing bore by oil duct again.The oil inlet pipe of oil pump is communicated with the oil sump of bearing bore; Fan is housed before the oil cooler; The cover body rear end has intake grill, and front end has exhaust port.Two screw rods respectively with screw axis interference fit separately.The housing of motor and bearing bore is made as one.
The utility model is owing to make gradually little variable-pitch type with the pitch of screw rod, make pumped gas in the pump housing, form continuous compression, screw vacuum pump is operated steadily, consumed power is little, under the condition that volume equates, bigger pumping speed and the degree of vacuum of Geng Gao be can obtain, and cantilever structure, easy access made more easily.But this pump discharging directly into atmosphere, and reliability height, long service life, application is extensive.
Description of drawings:
Fig. 1 is varying pitch screw profile of tooth figure.
Fig. 2 is the utility model embodiment vertical section structure figure.
Fig. 3 is an A-A sectional view among Fig. 2.
Embodiment:
With reference to Fig. 1, screw rod from preceding (suction end) backward (exhaust end) pitch diminish gradually, also be that gas is compressed continuously, equal substantially, so that the exhaust end air-flow is more stable near a few joint pitch of exhaust end.The profile of tooth of screw rod is rectangle basically.But the tooth curve inside and outside its pitch circle R is different, and promptly pitch circle internal tooth form front-end and back-end are concave arc line L 1, L 3, pitch circle external tooth form front-end and back-end are convex arc line L 2, L 4, can avoid interference phenomenon.
With reference to Fig. 2, Fig. 3, active screw rod 22, passive screw rod 29 interference fit separately tightly are placed on screw axis 16 and 28.The two screw rods top is communicated with suction port 1, and tail end is communicated with relief opening 19; Two screw rods is meshing with each other, and Hand of spiral is opposite.Two screw rods is all made of aluminum alloy, and the pump housing 23 also adopts aluminum alloy, the conformity that is beneficial to expand with heat and contract with cold.Motor 5 tops are provided with gear-box 4, motor shaft 7 tops be connected successively actuation gear 3 and oil pump, the tail end drive fan 8 of axle 7.Be positioned at the actuation gear 3 and gear 18 engagements that are packed on the driving screw shaft 16 of gear-box 4, gear 26 and the gear on the passive screw axis 28 27 of making one with gear 18 mesh.Motor casing 6 is made as one with the housing of bearing bore; Four bearings 14.1,14.2,14.3,14.4 that are used to support two screw rods are arranged on same bearing bore 15 two ends of the homonymy of two screw rods.
Because two screw rods makes the pumped gas compression ratio increase in running, temperature rises very fast, therefore in cover body 2 oil cooling system is set.Two screw rods axle 16,28 is all made hollow shaft, has multiple tracks and the hollow oil duct that is communicated with 20 around hollow 17, to begin oil cooling but from screw rod is inner.The cooling oil circuit is: the oil outlet end 25 of oil pump is communicated with the entry end 12 of oil cooler 10, and the outlet end 9 of oil cooler is communicated with cored screw axle 16,28, flows to bearing bore 15 backs by oil duct 20 again and is communicated with the oil inlet end 24 of oil pump.Fan 8 is housed before the oil cooler 10; Cover body 2 rear ends have intake grill 11, and front end has exhaust port 21.8 pairs of oil cooler 10 forced air coolings of fan by motor shaft 7 drivings, ambient air is inhaled into from the intake grill 11 of cover body, behind supercooler 10, pass through the pump housing 23 again, take away a part of heat of the pump housing, discharge from the exhaust port 21 of cover body, can guarantee that the screw pump temperature is in the operating temperature range all the time.

Claims (10)

1, a kind of varying pitch screw vacuum pump, comprise the pump housing (22) that is shaped on intakeport (1) and relief opening (19), be provided with intermeshing active screw rod (22) and passive screw rod (29) in the pump housing, the two screw rods top is communicated with suction port (1), and tail end is communicated with relief opening (19); Motor shaft (7) be equipped with driving screw shaft (16) on the actuation gear (3) of gear (18) engagement, be contained in driving gear (26) and driven gear (27) engagement that is contained on the passive screw axis (28) on the driving screw shaft (16), it is characterized in that active screw rod (22) and passive screw rod (29) are the variable pitch cooperating structure.
2, varying pitch screw vacuum pump according to claim 1, it is characterized in that described variable pitch be screw rod from front to back pitch dwindle gradually.
3, varying pitch screw vacuum pump according to claim 2, the fine pitch back segment that it is characterized in that screw rod is uniform pitch basically.
4, varying pitch screw vacuum pump according to claim 3 is characterized in that the profile of tooth on the screw rod is rectangle basically.
5, Variable pitch screw vacuum pump according to claim 4 is characterized in that inside and outside the joint garden (R) of profile of tooth be different curves.
6, varying pitch screw vacuum pump according to claim 1 is characterized in that screw axis (16,28) is a hollow shaft, has the axial oil duct (20) that communicates with hollow (17) around the hollow position of axle.
7, varying pitch screw vacuum pump according to claim 1, it is characterized in that the outer cover body (2) that is provided with of the pump housing (22), cover body also is provided with oil cooling system in (2), its oil circuit is: the oil outlet end of oil pump (25) is communicated with the entry end (12) of oil cooler (10), the outlet end of oil cooler (9) is communicated with cored screw axle (16,28), flows to bearing bore (15) back by oil duct (20) again and is communicated with the oil inlet end (24) of oil pump; The preceding fan (8) that is equipped with of oil cooler (10); Cover body (2) rear end has intake grill (11), and front end has exhaust port (21).
8, varying pitch screw vacuum pump according to claim 1, it is characterized in that screw rod (22,29) respectively with screw axis (16,28) interference fit.
9, varying pitch screw vacuum pump according to claim 1 is characterized in that the housing of motor (5) and bearing bore (15) is made as one.
10, varying pitch screw vacuum pump according to claim 1 is characterized in that the bearing of supporting screw axle is positioned at the two ends of the bearing bore of screw rod the same side (15).
CNU200520014921XU 2005-09-15 2005-09-15 Variable pitch screw vacuum pump Expired - Fee Related CN2893231Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200520014921XU CN2893231Y (en) 2005-09-15 2005-09-15 Variable pitch screw vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200520014921XU CN2893231Y (en) 2005-09-15 2005-09-15 Variable pitch screw vacuum pump

Publications (1)

Publication Number Publication Date
CN2893231Y true CN2893231Y (en) 2007-04-25

Family

ID=38061393

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU200520014921XU Expired - Fee Related CN2893231Y (en) 2005-09-15 2005-09-15 Variable pitch screw vacuum pump

Country Status (1)

Country Link
CN (1) CN2893231Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102808772A (en) * 2012-08-14 2012-12-05 东北大学 Single-head varying pitch screw rotor with uniform tooth top width
CN102884324A (en) * 2010-05-04 2013-01-16 厄利孔莱博尔德真空技术有限责任公司 Screw vacuum pump
CN102937094A (en) * 2012-10-22 2013-02-20 台州职业技术学院 Dry screw vacuum pump varying pitch screw
CN106401955A (en) * 2016-11-29 2017-02-15 南京路特软件有限公司 Precooling compressor capable of improving intake efficiency

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102884324A (en) * 2010-05-04 2013-01-16 厄利孔莱博尔德真空技术有限责任公司 Screw vacuum pump
CN102808772A (en) * 2012-08-14 2012-12-05 东北大学 Single-head varying pitch screw rotor with uniform tooth top width
WO2014026439A1 (en) * 2012-08-14 2014-02-20 东北大学 Single-head varying pitch screw rotor with uniform tooth top width
CN102808772B (en) * 2012-08-14 2014-12-31 东北大学 Single-head varying pitch screw rotor with uniform tooth top width
CN102937094A (en) * 2012-10-22 2013-02-20 台州职业技术学院 Dry screw vacuum pump varying pitch screw
CN102937094B (en) * 2012-10-22 2016-05-04 台州职业技术学院 A kind of dry screw vacuum pump varying pitch screw
CN106401955A (en) * 2016-11-29 2017-02-15 南京路特软件有限公司 Precooling compressor capable of improving intake efficiency

Similar Documents

Publication Publication Date Title
CN101349268B (en) Screw compressor
CN2893231Y (en) Variable pitch screw vacuum pump
CN201165958Y (en) Crankshaft structure of compressor for refrigeration
KR0153343B1 (en) Reciprocating compressor
CN200999730Y (en) Air-cooled type Root's vacuum pump
CN2667203Y (en) Multi-stage Roots oil-free vacuum pump
CN212079628U (en) Fixed screw air-cooled air compressor
CN105889074A (en) Rotary compressor
CN210033835U (en) Rotary compressor
CN106678041B (en) A kind of outer balance type screw vacuum pump
CN201027650Y (en) Roots vacuum pump
CN103291617B (en) Scroll compressor and air attemperation apparatus
CN215949822U (en) Oil injection screw vacuum pump
CN207795581U (en) The bent axle of frequency-changeable compressor
CN220302336U (en) Spiral air compressor
CN210919779U (en) Crankshaft applied to high-load fixed-frequency compressor
CN215719293U (en) Plunger type hydraulic integrated pump
CN221347284U (en) Screw air compressor machine cooling structure
CN219061919U (en) Multistage compression air compressor
CN219587775U (en) Screw vacuum pump
CN87201988U (en) Unlubricated air compressor
CN212407039U (en) Oil injection cooling device of two-stage compression screw air compressor
CN220059896U (en) Multistage screw compressor
CN218237026U (en) Oil pumping device and hydraulic equipment
CN209621547U (en) A kind of compressor avoiding crankshaft play

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Designer after: Chen Haiyao

Designer after: Liang Boshun

Designer after: Zhou Fashun

Designer after: Wu Linan

Designer before: Chen Haiyao

Designer before: Liang Boshun

Designer before: Zhou Fashun

COR Change of bibliographic data

Free format text: CORRECT: DESIGNER; FROM: CHEN HAI ; LIANG BOSHUN; ZHOU FASHUN TO: CHEN HAI ; LIANG BOSHUN; ZHOU FASHUN; WU LINAN

EE01 Entry into force of recordation of patent licensing contract

Assignee: Taizhou Xingguang Vacuum Equipment Co., Ltd.

Assignor: Liang Boshun|Chen Haiyao|Zhou Fashun

Contract fulfillment period: 2009.4.2 to 2015.9.14

Contract record no.: 2009330001880

Denomination of utility model: Variable pitch screw vacuum pump

Granted publication date: 20070425

License type: Exclusive license

Record date: 20090807

LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.2 TO 2015.9.14; CHANGE OF CONTRACT

Name of requester: TAIZHOU STARLIGHT VACUUM EQUIPMENT MANUFACTURING C

Effective date: 20090807

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070425

Termination date: 20100915