CN2711426Y - Wind cooling screen groove type traction molecular pump - Google Patents
Wind cooling screen groove type traction molecular pump Download PDFInfo
- Publication number
- CN2711426Y CN2711426Y CN 200420065310 CN200420065310U CN2711426Y CN 2711426 Y CN2711426 Y CN 2711426Y CN 200420065310 CN200420065310 CN 200420065310 CN 200420065310 U CN200420065310 U CN 200420065310U CN 2711426 Y CN2711426 Y CN 2711426Y
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- CN
- China
- Prior art keywords
- rotor
- pump
- pump housing
- pump body
- drive motor
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- Expired - Fee Related
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Abstract
The utility model provides a wind cooling screw groove type traction molecular pump, comprising a pump body, a rotor, a cover board, a base, a pumping air tap, a driving motor, etc. One or more helical grooves are arranged on the pump body which are in conical or columnar shapes and the rotor and are used as bleed off passages. The rotor and the driving motor are directly connected with each other. The driving motor and the pump body are arranged on the base, or the pump body is directly arranged on the flange plate of the driving motor. The shafts of the pump body, the rotor and a driving engine are concentric. According to different operating requirements, the gap between the rotor and the pump body can be adjusted. The pumping air tap and an exhaust outlet are respectively arranged on the pump body. The exhaust outlet is communicated with the atmosphere and straightly exhausts air into the atmosphere. The utility model has a simple and compact structure, and the use of the utility model is automotive and flexible; a small-sized cleaning low vacuum pump without oil having larger pumping rate and lower ultimate pressure can be obtained; the utility model can be used as a backing pump of a turbine molecular pump and other high vacuum pumps without oil, and the utility model is can also be used for vacuum packing in some industrial departments, such as foodstuff, medicine, etc., or other vacuum air exhaust of cleaning environment.
Description
Technical field the utility model belongs to a kind of no oily molecular drag pump, a kind of Wind-cooling type spiral groove type molecular drag pump of rough vacuum specifically, but discharging directly into atmosphere.
Background technique is after German's Gaede in 1913 has been invented molecular drag pump, and people take much count of the improvement of its structure always.Before 50～60 years, the novel traction molecular pump of multiple different structure form once appearred, and that rotor has is cylindrical, the branch of cone type and disc type.Because its structure is still complicated, pumping speed is low, therefore, fails to be used widely.In recent years, along with the continuous development of vacuum industry, occur several oil-free vacuum pumps (being also referred to as dry vacuum pump) in succession, they can be pressed onto 10 at atmosphere
-2Work in the pressure range of Pa, but their volume ratio is bigger, and structure is more complicated also.And at present, the oil-less pump of coarse vacuum has only diaphragm-type vacuum pump, and it is a kind of of variable capacity vacuum pump, and bleeding of it is the to-and-fro motion of a soft barrier film, produce resiliently deformable, the volume of the aspirating chamber on the pump housing is produced periodically increase or diminish and reach the purpose of bleeding.Its speed of exhaust is smaller, and ultimate pressure height, barrier film are aging easily, damage, thereby working life is shorter.
The summary of the invention the purpose of this utility model is to provide a kind of compact structure, can obtains the Wind-cooling type spiral groove type molecular drag pump of the big speed of exhaust and low ultimate pressure.
For achieving the above object, the technological scheme that the utility model is taked is: this Wind-cooling type spiral groove type molecular drag pump by the pump housing, rotor, cover plate, base, bleed to chew and form with drive motor etc., on conical or the columniform pump housing or rotor, have one or more spiral chute as bleed-off passage; Rotor directly links to each other with drive motor, the drive motor and the pump housing are installed on the base or the pump housing are directly installed on the flange plate of drive motor, the pump housing, rotor are concentric with the axle of driving motor, and rotor can be adjusted according to different usage requirements with the gap between the pump housing; Being respectively equipped with on the pump housing bleeds chews, relief opening, and relief opening communicates with atmosphere, discharging directly into atmosphere.
Described drive motor places rotor cavity directly to be connected with rotor, has simplified drive mechanism, has reduced the height of pump.
Width even depth such as described spiral chute or the degree of depth shoals gradually, the cross section of bleeding of pump can increase.
On the described drive motor axle fan is installed, fan can cool off the rotor of motor self, bearing and pump.
The above-mentioned Wind-cooling type spiral groove type molecular drag pump that the utility model provides, with the MOMENTUM TRANSMISSION is working principle, drive the rotor high-speed rotation by drive motor, to the friction of gas traction gas molecule is moved by epitrochanterian spiral chute surface by certain orientation and realize vacuum suction, thereby gas molecule continuously sucks and is transferred to outlet from the inlet of pump, thereby has the bigger speed of exhaust; Owing to have only little gap between rotor and the pump housing, but the two is not in contact with one another, and does not produce fretting wear, and rotor can adjust according to different usage requirements with the gap between the pump housing, thereby can obtain lower ultimate pressure; Owing to do not have oil or other working medium in the bleed-off passage (as spiral chute) of this pump, therefore, it is a kind of Roughing pump of cleaning to being taken out the pollution that container and surrounding environment do not produce oil vapor.These performances of this molecular drag pump satisfy the requirement of some industrial departments, and for example, it can be used as the fore pump of the no innage vacuum pump of turbomolecular pump that industrial departments such as electronics, semiconductor use etc.; Its obtainable ultimate pressure just industrial department such as food, medicine in order to vacuum-packed degree of vacuum, therefore, vacuum suction when also being suitable for vacuum packaging is used, vacuum packaging as food (dried, aquatic foods), cereal (rice, wheat, beans), clothing, medicine etc., can prolong the freshness storage life in the above-mentioned article, perhaps anti-ly damage by worms, moistureproof and mildewproof becomes, anti-pollution, save the energy.In addition, this molecular drag pump is simple and compact for structure, volume is little, use maneuverability, but unit uses.
Appended drawings is the structural representation of Wind-cooling type spiral groove type molecular drag pump
Among the figure: 1-bleeds and chews; The 2-cover plate; The 3-pump housing; The 4-rotor; The 5-drive motor; The 6-base; The 7-air outlet.
Embodiment as shown in the figure, this Wind-cooling type spiral groove type molecular drag pump by the pump housing 3, rotor 4, cover plate 2, base 6, bleed chew 1 and drive motor 5 etc. form, except that drive motor 5, the material of remaining part can be an aluminum alloy, or aluminum alloy mixes use with steel, also or plastics.The pump housing 3 and drive motor 5 are installed in (pump housing 3 also can be directly installed on the flange plate of drive motor 5) on the base 6; The rotor 4 that the pump housing 3 and Qi Nei are provided with all is cone or cylindrical body, has one or more spiral chute as bleed-off passage on the pump housing 3 or rotor 4, and rotor 4 can be adjusted according to different usage requirements with the gap between the pump housing 3; Drive motor 5 and place the cavity of rotor 4 directly to be connected, on the axle of drive motor 5 fan is installed with rotor 4; Make the axle of the pump housing 3, rotor 4 and drive motor 5 concentric by cover plate 2; The top of the pump housing 3 is provided with to bleed chews 1, and the relief opening 7 on the base 6 communicates with atmosphere, can discharge gas continuously in atmosphere.Above-mentioned molecular drag pump can vertical or horizontal installation.
When drive motor 5 drives rotor 4 high speed rotating, being taken out gas in the container (as food pack or other space to be vacuumized) chews 1 and enters the spiral chute of rotor 4 from bleeding, the inwall of the spiral chute of rotor 4 and the pump housing 3 forms bleed-off passage, gas traction compression is discharged to the atmosphere from the relief opening 7 of pump housing base 6 bottoms, has finished the vacuum suction process.
Claims (4)
1, a kind of Wind-cooling type spiral groove type molecular drag pump, comprise the pump housing (3), rotor (4), cover plate (2), base (6), bleed and chew (1) and drive motor (5), it is characterized in that having one or more spiral chute as bleed-off passage on conical or the columniform pump housing (3) or the rotor (4); Rotor (4) is connected with drive motor (5), the drive motor (5) and the pump housing (3) are installed on the base (6), or the pump housing (3) is directly installed on the flange plate of drive motor (5), the axle of the pump housing (3), rotor (4) and driving motor (5) is concentric, and rotor (4) can be adjusted according to different usage requirements with the gap between the pump housing (3); Being respectively equipped with on the pump housing (3) bleeds chews (1) and relief opening (7), and relief opening (7) communicates discharging directly into atmosphere with atmosphere.
2, Wind-cooling type spiral groove type molecular drag pump according to claim 1 is characterized in that above-mentioned drive motor (5) places the cavity of rotor (4) directly to be connected with rotor (4).
3, Wind-cooling type spiral groove type molecular drag pump according to claim 1 and 2 is characterized in that width even depth such as the spiral chute that has on the above-mentioned pump housing (3) or the rotor (4) or the degree of depth shoals gradually.
4, Wind-cooling type spiral groove type molecular drag pump according to claim 1 and 2, it is characterized in that above-mentioned drive motor (5) the axle on fan is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420065310 CN2711426Y (en) | 2004-05-29 | 2004-05-29 | Wind cooling screen groove type traction molecular pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420065310 CN2711426Y (en) | 2004-05-29 | 2004-05-29 | Wind cooling screen groove type traction molecular pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711426Y true CN2711426Y (en) | 2005-07-20 |
Family
ID=36192529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420065310 Expired - Fee Related CN2711426Y (en) | 2004-05-29 | 2004-05-29 | Wind cooling screen groove type traction molecular pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711426Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000153A1 (en) * | 2013-07-03 | 2015-01-08 | Li Lin | Conical rotor pump |
-
2004
- 2004-05-29 CN CN 200420065310 patent/CN2711426Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000153A1 (en) * | 2013-07-03 | 2015-01-08 | Li Lin | Conical rotor pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |