CN202468326U - Vacuum pump - Google Patents
Vacuum pump Download PDFInfo
- Publication number
- CN202468326U CN202468326U CN2012200598473U CN201220059847U CN202468326U CN 202468326 U CN202468326 U CN 202468326U CN 2012200598473 U CN2012200598473 U CN 2012200598473U CN 201220059847 U CN201220059847 U CN 201220059847U CN 202468326 U CN202468326 U CN 202468326U
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- Prior art keywords
- rotating shaft
- vacuum pump
- drive motor
- sealing
- coupling
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- Expired - Fee Related
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Abstract
The utility model provides a vacuum pump which belongs to the technical field of machinery and resolves the problem that lubrication oil in the vacuum pump is prone to flow out. The vacuum pump comprises a casing, an end cap, at least one rotor, rotary shafts and gears with the number corresponding to the number of the rotors, a driving motor, a sealing structure, a coupler and a fixing part. The sealing structure comprises a set of sealing parts arranged on the rotary shafts, and the sealing parts are provided with first through holes axially penetrating through the sealing parts. Ends of the sealing parts, which are far away from the driving motor, extend outwards to form annular extension portions. Peripheral surfaces of the extension portions extend outwards and obliquely. The vacuum pump can effectively prevent lubrication oil in the vacuum from flowing out and is simple in structure and convenient to manufacture.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of vacuum pump.
Background technique
Vacuum pump is a kind of device that ins all sorts of ways and in a certain enclosed space, produce, improve and keep vacuum that makes.Existing vacuum pump generally is to need the gas in the vaccum-pumping equipment through self the gas discharge to be needed vaccum-pumping equipment then through continuous suction, vacuumizes purpose so as to reaching.Said vacuum pump generally comprises housing, envelope is established and housing end covers at two sides, two rotating shaft, motor, two synchromesh gear and seal rings that are sheathed on respectively in the rotating shaft with rotor.The outside of said one of them end cap offers suction port, on housing, is provided with relief opening; Two rotating shafts run through another end cap respectively and are positioned at the cavity that is surrounded by housing and end cap.In cavity, contain the lubricant oil that is used for lubricated synchromesh gear.Seal ring is sheathed in the rotating shaft and between rotating shaft and end cap, is used to prevent that the lubricant oil in the cavity from flowing out vacuum pump.One of them rotating shaft is stretched out end cap and is connected with motor.The vacuum pump of this structure can reach the purpose that needs vaccum-pumping equipment to vacuumize preferably; When motor was not activated, seal ring can prevent that the lubricant oil in the cavity from flowing out vacuum pump.But behind electric motor starting, the rotating shaft meeting is rotated with respect to seal ring, and at this moment, because the alignment error of seal ring and rotating shaft, the gap between rotating shaft and the seal ring will enlarge; After rotating shaft was rotated a period of time with respect to seal ring, the seal ring expanded by heating at this moment, though sealing has been strengthened, also meaned the friction aggravation between rotating shaft and the seal ring, thereby has caused the wearing and tearing of seal ring inner peripheral surface; Motor cuts out when restarting after a period of time, and the seal ring and the gap between the rotating shaft of cooling will be bigger, thereby make sealing poorer.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, and a kind of vacuum pump is provided, and this vacuum pump can prevent that the lubricant oil in the vacuum pump is difficult for flowing out vacuum pump.
The purpose of the utility model can realize through following technical proposal: a kind of vacuum pump, and it comprises that a shell, envelope be located at the end cap at said shell two ends, at least one rotor in the said shell, corresponding with the quantity of said rotor and run through the rotating shaft, corresponding with the quantity of said rotor and be sheathed on gear in the corresponding rotating shaft, reach and be connected with said rotating shaft and the drive motor of power to said rotating shaft is provided of said rotor of being located at; The end cap that envelope is located at the nearly drive motor end of shell be provided with one axially run through said end cap through hole; Said rotating shaft is passed said through hole and is connected with said drive motor; Said vacuum pump comprises that also one is sheathed in the said rotating shaft and is located at the sealing configuration in the said through hole; Said sealing configuration comprises that one is sheathed on the Sealing in the said rotating shaft, said Sealing have one axially run through said Sealing first penetration hole; The drive motor end far away of said Sealing stretches out and is formed with the extension part of a ring-type, the outward-dipping extension of the outer circumferential face of said extension part.
Have the gap between extension part and the through-hole wall, this gap is minimum.End cap and shell form the cavity of hollow; Offer the suction port that is communicated with cavity on the end cap of drive motor far away, offer the relief opening that is communicated with cavity on the shell; Described suction port is communicated with relief opening and atmosphere with the need vacuumizing device.Contain the lubricant oil that is used for oilgear in the said cavity.After the drive motor unlatching; Drive motor drives rotating shaft and rotates and then drive rotor rotation; Suction port extracts the gas that needs in the vaccum-pumping equipment in a large number, and gas is discharged through relief opening after getting into the vacuum pump cavity, so just accomplishes the discharge that needs gas in the vaccum-pumping equipment.In this process, the oil lubrication gear, Sealing is along with rotating shaft is rotated together; On lubricating oil splash to the outward-dipping extension part outer circumferential face, thereby lubricant oil radial motion under action of centrifugal force breaks away from the outer circumferential face of extension part, thereby stops that lubricant oil flows out vacuum pump.After motor cut out, lubricant oil was in the dirty bottom, chamber of making the return trip empty of action of gravity.
In above-mentioned vacuum pump, said sealing configuration comprises that also one is sheathed in the rotating shaft and is located at the axle sleeve in first penetration hole, and said axle sleeve is threaded with Sealing.
Axle sleeve is integrally formed through screw thread and Sealing, is convenient to the dismounting and the installation of Sealing like this; Be threaded simultaneously and strengthened the sealing between axle sleeve and the Sealing, prevent that the interior lubricant oil of cavity is through flowing out between Sealing and the axle sleeve.
In above-mentioned vacuum pump, said sealing configuration comprises that also one is sheathed on the seal ring in the rotating shaft, and said seal ring is fixedly arranged on the drive motor end far away of the inwall of said first penetration hole.Seal ring has been strengthened the sealing between Sealing and the rotating shaft, prevents that the lubricant oil in the cavity from flowing out through the gap between Sealing and the rotating shaft.
In above-mentioned vacuum pump, the drive motor end far away of said through-hole wall sets to the concave and forms the accepting groove of an annular, and said extension part is contained in the said accepting groove; The nearly drive motor end of said extension part drive motor dorsad is arranged with the receiving groove that forms an annular; The inwall of said accepting groove extends to form an annular and is contained in the holding section in the said receiving groove to extension part; Said holding section is provided with one and is located between extension part and the drive motor and the groove that is connected with said accepting groove, said groove extending circumferentially and opening rotating shaft dorsad.Sealing and axle sleeve are along with rotating shaft is rotated together, and on lubricating oil splash to the outward-dipping extension part outer circumferential face, thereby the radial motion under action of centrifugal force of a large amount of lubricant oil breaks away from the extension part outer circumferential face; The lubricant oil of minute quantity outer circumferential face along extension part under effect of inertia flows in the groove.
In above-mentioned vacuum pump, the inwall space of said extension part and said accepting groove; Said groove is connected with accepting groove with gap between the accepting groove inwall through said extension part.Make between Sealing and the accepting groove inwall not friction like this, avoided because the wearing and tearing that friction causes, prolonged the working life of Sealing and end cap.
In above-mentioned vacuum pump; Said vacuum pump also comprises a pressing plate, reaches the coupling of a connection rotating shaft and drive motor; Said coupling comprise first half-coupling that is connected with rotating shaft and respectively with first half-coupling and joining second half-coupling of drive motor, said first half-coupling is located between pressing plate and the end cap; Said rotating shaft axially runs through said first half-coupling, and said pressing plate is pressed and is located on said first half-coupling, and said first half-coupling is resisted against the nearly drive motor end of Sealing.
Coupling has been strengthened the join strength between drive motor and the rotating shaft, improves the installation precision between drive motor and the rotating shaft and then slowed down the vibration that rotating shaft brings under the drive motor high-speed rotation; Simultaneously, through being threaded, first half-coupling is being replaced Sealing and is being shifted along with the high-speed rotation of rotating shaft to prevent Sealing between Sealing and the axle sleeve; Improve the reliability of complete machine, prolonged the life-span of complete machine.
In above-mentioned vacuum pump, said vacuum pump also comprises a fixed block, and an end of said fixed block runs through said pressing plate and is located at the nearly drive motor end of rotating shaft; Said fixed block is threaded with pressing plate and rotating shaft respectively.Realized that like this pressing plate replacing coupling; Fixed block and rotating shaft simultaneously is threaded, and is convenient to the installation of fixed block like this, convenient simultaneously pretightening force of accurately regulating between pressing plate and the coupling.
In above-mentioned vacuum pump, said rotor is a screw rod.Easily manufactured, practiced thrift the cost of vacuum pump.
Compared with prior art, the utlity model has following advantage:
1, between end cap and rotating shaft, is provided with Sealing; Sealing is along with rotating shaft is rotated together; Described Sealing has an extension part; Lubricant oil in the cavity splashes under the effect of rotor and gear, and on lubricating oil splash to the outward-dipping extension part outer circumferential face, thereby lubricant oil radial motion under action of centrifugal force breaks away from the extension part outer circumferential face; Can stop effectively that like this lubricant oil flows out in cavity, and simple in structure, be convenient to make.
2, between Sealing and rotating shaft, be provided with an axle sleeve; Axle sleeve is connected with Sealing through screw thread; Be convenient to the dismounting and the installation of Sealing like this, be threaded simultaneously and strengthened the sealing between axle sleeve and the Sealing, prevent that the interior lubricant oil of cavity is through flowing out between Sealing and the axle sleeve.
Description of drawings
Fig. 1 is the structural representation of a kind of vacuum pump of the utility model.
Fig. 2 is the enlarged view at A shown in Figure 1 place.
Among the figure, 10, shell; 11, relief opening; 20, end cap; 21, holding section; 30, sealing configuration; 31, Sealing; 311, extension part; 32, axle sleeve; 33, seal ring; 40, coupling; 41, first half-coupling; 42, second half-coupling; 50, pressing plate; 60, fixed block; 70, rotor; 80, gear; 90, drive motor.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.
See also Fig. 1 and Fig. 2, a kind of vacuum pump, it comprise shell 10, end cap 20, at least one rotor 70, with the corresponding rotating shaft of rotor 70 quantity and gear 80, drive motor 90, sealing configuration 30, coupling 40 and fixed block 60.In actual production, vacuum pump can be provided with a rotor 70, two rotors 70 or three rotors 70 according to needs of production; As preferred implementation, the quantity of present embodiment rotor 70, rotating shaft and gear 80 is two.
Please continue to consult Fig. 1 and Fig. 2, described end cap 20 envelopes are located at the two ends of shell 10; The cavity of end cap 20 and shell 10 formation hollows.Shell 10 is provided with the relief opening 11 that is communicated with cavity, and relief opening 11 and atmosphere.One of them end cap 20 is provided with the suction port (indicating among the figure) that is communicated with cavity, and described suction port is communicated with the need vaccum-pumping equipment; Another one end cap 20 is provided with a through hole that runs through said end cap 20.Setting wherein rotating shaft is active rotating shaft, and an other rotating shaft is passive rotating shaft.Said active rotating shaft and passive rotating shaft lay respectively in the cavity.One end of said active rotating shaft passes said through hole and is connected with drive motor 90.Two rotating shafts are located in the through hole respectively and are positioned at cavity.In each rotating shaft, be arranged with a rotor 70 and gear 80; Each rotor 70 and rotating shaft drive fit; Gear 80 is between rotor 70 and end cap 20, and two gears 80 are meshing with each other and are a pair of synchromesh gear 80.Contain the lubricant oil that is used for lubricated synchromesh gear 80 in the said cavity.
Please continue to consult Fig. 1 and Fig. 2, wherein a rotating shaft extends axially out end cap 20, on this rotating shaft axial direction, is provided with a drive motor 90; Said drive motor 90 nearly rotating shaft ends are connected with a live axle.Coupling 40 comprises first half-coupling 41 and second half-coupling 42.First half-coupling 41 is sheathed in the rotating shaft, and second half-coupling 42 is set on the live axle and with first half-coupling 41 and is connected.Coupling 40 has been strengthened the join strength between drive motor 90 and the rotating shaft, improves the installation precision between drive motor 90 and the rotating shaft and then slowed down the vibration that rotating shaft brings under drive motor 90 high-speed rotation.Said pressing plate 50 is located at nearly drive motor 90 ends of rotating shaft and between first half-coupling 41 and second half-coupling 42.One end of said fixed block 60 runs through pressing plate 50, and is threaded with pressing plate 50 and rotating shaft respectively; Under the adjusting of fixed block 60, pressing plate 50 is compressing the nearly motor side of first half-coupling 41.
Please continue to consult Fig. 1 and Fig. 2, said sealing configuration 30 is located in the through hole.The motor side far away of first half-coupling 41 is compressing sealing configuration 30.Sealing configuration 30 comprises axle sleeve 32, seal ring 33 and Sealing 31.Axle sleeve 32 is set in the rotating shaft; Sealing 31 is set on the axle sleeve 32.Sealing 31 comprises first penetration hole (among the figure indicate) that axially runs through.On the inwall of first penetration hole, be provided with screw thread.Described Sealing 31 and axle sleeve 32 are through being threaded; Axle sleeve 32 is integrally formed through screw thread and Sealing 31, is convenient to the dismounting and the installation of Sealing 31 like this, is threaded simultaneously and has strengthened the sealing between axle sleeve 32 and the Sealing 31, prevents that the lubricant oil in the cavity from passing through to flow out between Sealing 31 and the axle sleeve 32.Extend to form the extension part 311 of a ring-type in the drive motor far away 90 end extroversions of Sealing 31.The outward-dipping extension of the outer circumferential face of extension part 311 and and through-hole wall between have the gap, but this gap is minimum.Drive motor far away 90 ends of said through-hole wall set to the concave and form the accepting groove of an annular.Described extension part 311 is contained in the accepting groove; Nearly drive motor 90 ends of extension part 311 drive motor 90 dorsad extend the receiving groove that is arranged with formation one annular.The inwall of said accepting groove extends to form an annular and is contained in the holding section 21 in the said accepting groove to extension part 311.Said holding section 21 is provided with one and is located between extension part 311 and the drive motor 90 and the groove that is connected with said accepting groove.Said groove extending circumferentially and opening rotating shaft dorsad.The inwall space of said extension part 311 and said accepting groove.Said groove is connected with accepting groove with gap between the accepting groove inwall through said extension part 311.Seal ring 33 is sheathed in the rotating shaft, and said seal ring 33 is fixed on the motor side far away of the first penetration hole inwall and between the first penetration hole inwall and rotating shaft; Seal ring 33 has further been strengthened the sealing between Sealing 31 and the rotating shaft, prevents that the lubricant oil in the cavity from flowing out through the gap between Sealing 31 and the rotating shaft.
Please continue to consult Fig. 1 and Fig. 2, as a kind of vacuum pump of second embodiment of the utility model, similar on present embodiment and a kind of vacuum pump structure of first embodiment and the function; Its difference is that in the present embodiment, vacuum pump is not provided with axle sleeve 32.Described Sealing 31 be sheathed in the rotating shaft and can and rotating shaft rotate together.
Please continue to consult Fig. 1 and Fig. 2; After drive motor 90 starts; Drive motor 90 rotates through coupling 40 and drives the rotating shaft rotation that is connected with live axle, and active rotating shaft drives driven spindles through synchromesh gear 80 and rotates synchronously, and then two rotors 70 are rotated synchronously; Suction port extracts the gas that needs in the vaccum-pumping equipment in a large number; Gas gets in the vacuum pump cavity back and discharges through relief opening 11, so just accomplished the discharge that needs gas in the vaccum-pumping equipment, has realized the purpose that vacuumizes in need vaccum-pumping equipment.In this process; Oil lubrication synchromesh gear 80; Sealing 31 and axle sleeve 32 are along with rotating shaft is rotated together, and on lubricating oil splash to outward-dipping extension part 311 outer circumferential faces, thereby the radial motion under action of centrifugal force of a large amount of lubricant oil breaks away from extension part 311 outer circumferential faces; The lubricant oil of minute quantity outer circumferential face along extension part 311 under effect of inertia flows in the groove.After motor cut out, rotor 70 stopped operating with gear 80, and flow of lubricant makes the return trip empty bottom the chamber.So just reach the purpose that the lubricant oil that is arranged in cavity can't flow out vacuum pump.
In sum, a kind of vacuum pump of the utility model comprise shell 10, end cap 20, at least one rotor 70, with the corresponding rotating shaft of rotor 70 quantity and gear 80, drive motor 90, sealing configuration 30, coupling 40 and fixed block 60; In the vacuum pump vacuum, oil lubrication gear 80, Sealing 31 is along with rotating shaft is rotated together; On lubricating oil splash to extension part 311 outer circumferential faces of outward-dipping extension, thereby lubricant oil radial motion under action of centrifugal force breaks away from the outer circumferential face of extension part 311; After motor cut out, lubricant oil was in the dirty bottom, chamber of making the return trip empty of the effect of gravity.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Claims (8)
1. vacuum pump, it comprises that a shell (10), envelope be located at the end cap (20) at said shell (10) two ends, at least one rotor (70) in the said shell (10), corresponding with the quantity of said rotor (70) and run through the rotating shaft, corresponding with the quantity of said rotor (70) and be sheathed on gear (80) in the corresponding rotating shaft, reach and be connected with said rotating shaft and the drive motor of power to said rotating shaft (90) is provided of said rotor (70) of being located at; The end cap (20) that envelope is located at nearly drive motor (90) end of shell (10) be provided with one axially run through said end cap (20) through hole; Said rotating shaft is passed said through hole and is connected with said drive motor (90); It is characterized in that; Said vacuum pump comprises that also one is sheathed in the said rotating shaft and is located at the sealing configuration (30) in the said through hole; Said sealing configuration (30) comprises that one is sheathed on the Sealing (31) in the said rotating shaft, said Sealing (31) have one axially run through said Sealing (31) first penetration hole; The extension part (311) that drive motor far away (90) end of said Sealing (31) stretches out and is formed with a ring-type, the outward-dipping extension of outer circumferential face of said extension part (311).
2. vacuum pump according to claim 1 is characterized in that, said sealing configuration (30) comprises that also one is sheathed in the rotating shaft and is located at the axle sleeve (32) in first penetration hole, and said axle sleeve (32) is threaded with Sealing (31).
3. vacuum pump according to claim 2 is characterized in that, said sealing configuration (30) comprises that also one is sheathed on the seal ring (33) in the rotating shaft, and said seal ring (33) is fixedly arranged on drive motor far away (90) end of the inwall of said first penetration hole.
4. according to each described vacuum pump among the claim 1-3, it is characterized in that drive motor far away (90) end of said through-hole wall sets to the concave and forms the accepting groove of an annular, said extension part (311) is contained in the said accepting groove; The nearly drive motor (90) of said extension part (311) is held dorsad, and drive motor (90) is arranged with the receiving groove that forms an annular; The inwall of said accepting groove extends to form an annular and is contained in the holding section (21) in the said receiving groove to extension part (311); Said holding section (21) is provided with one and is located between extension part (311) and the drive motor (90) and the groove that is connected with said accepting groove, said groove extending circumferentially and opening rotating shaft dorsad.
5. vacuum pump according to claim 4 is characterized in that, the inwall space of said extension part (311) and said accepting groove; Said groove is connected with accepting groove with gap between the accepting groove inwall through said extension part (311).
6. according to each described vacuum pump among the claim 1-3; It is characterized in that; Said vacuum pump also comprises a pressing plate (50), reaches the coupling (40) of a connection rotating shaft and drive motor (90); Said coupling (40) comprise first half-coupling (41) that is connected with rotating shaft and respectively with first half-coupling (41) and joining second half-coupling of drive motor (90) (42), said first half-coupling (41) is located between pressing plate (50) and the end cap (20); Said rotating shaft axially runs through said first half-coupling (41), and said pressing plate (50) is pressed and is located on said first half-coupling (41), and said first half-coupling (41) is resisted against nearly drive motor (90) end of Sealing (31).
7. vacuum pump according to claim 6 is characterized in that, said vacuum pump also comprises a fixed block (60), and an end of said fixed block (60) runs through said pressing plate (50) and is located at nearly drive motor (90) end of rotating shaft; Said fixed block (60) is threaded with end cap (20) and rotating shaft respectively.
8. according to each described vacuum pump among the claim 1-3, it is characterized in that said rotor (70) is a screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200598473U CN202468326U (en) | 2012-02-23 | 2012-02-23 | Vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200598473U CN202468326U (en) | 2012-02-23 | 2012-02-23 | Vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202468326U true CN202468326U (en) | 2012-10-03 |
Family
ID=46916487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200598473U Expired - Fee Related CN202468326U (en) | 2012-02-23 | 2012-02-23 | Vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202468326U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678042A (en) * | 2016-12-15 | 2017-05-17 | 卡川尔流体科技(上海)有限公司 | Bubble making device with rotary vane pump |
| CN109734043A (en) * | 2018-12-18 | 2019-05-10 | 宝泰科技有限公司 | A kind of automated calibration system for gas station oil gas recycling |
| RU2689224C2 (en) * | 2015-01-15 | 2019-05-24 | Атлас Копко Эрпауэр, Намлозе Веннотсхап | Screw element of vacuum pump with oil seal |
| CN110998096A (en) * | 2017-08-02 | 2020-04-10 | 株式会社爱发科 | Vacuum pump |
-
2012
- 2012-02-23 CN CN2012200598473U patent/CN202468326U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2689224C2 (en) * | 2015-01-15 | 2019-05-24 | Атлас Копко Эрпауэр, Намлозе Веннотсхап | Screw element of vacuum pump with oil seal |
| CN106678042A (en) * | 2016-12-15 | 2017-05-17 | 卡川尔流体科技(上海)有限公司 | Bubble making device with rotary vane pump |
| CN106678042B (en) * | 2016-12-15 | 2024-04-12 | 卡川尔流体科技(上海)有限公司 | Foam making device of rotary vane pump |
| CN110998096A (en) * | 2017-08-02 | 2020-04-10 | 株式会社爱发科 | Vacuum pump |
| CN110998096B (en) * | 2017-08-02 | 2021-03-23 | 株式会社爱发科 | Vacuum pump |
| CN109734043A (en) * | 2018-12-18 | 2019-05-10 | 宝泰科技有限公司 | A kind of automated calibration system for gas station oil gas recycling |
| CN109734043B (en) * | 2018-12-18 | 2020-06-26 | 宝泰科技有限公司 | Automatic calibration system for oil gas recovery of gas station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20170223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |