CN103062063A - Convection and fully-cooled type end cover structure for novel roots pump - Google Patents
Convection and fully-cooled type end cover structure for novel roots pump Download PDFInfo
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- CN103062063A CN103062063A CN2013100477552A CN201310047755A CN103062063A CN 103062063 A CN103062063 A CN 103062063A CN 2013100477552 A CN2013100477552 A CN 2013100477552A CN 201310047755 A CN201310047755 A CN 201310047755A CN 103062063 A CN103062063 A CN 103062063A
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- roots pump
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Abstract
The invention relates to a convection and fully-cooled type end cover structure for a novel roots pump. The convection and fully-cooled type end cover structure comprises an end cover body and is characterized in that the end cover body is in shape of a geometrical octagon; inner end cover cooling grooves which are annually distributed are formed in the inner surface of the end cover body; outer end cover cooling grooves which are also annularly distributed are formed in the inner surface, on the outer side of each inner end cover cooling groove, of the end cover body; and two symmetrically-distributed vacuum sealing grooves are formed in the inner surface, on the inner side of each inner end cover cooling groove, of the end cover body. According to the convection and fully-cooled type end cover structure for the novel roots pump, a roots pump body is high in strength and rigidity due to the end cover in shape of the geometrical octagon; two independent cooling chamber layers are formed, thereby two independent cooling falling lines can be formed by the cooling liquid, and a convection mode can be formed as well; the convection and fully-cooled type end cover structure can be used in match with a novel jacketed type fully-cooled roots pump, therefore, sufficient cooling liquid can be provided for dissipating the heat generated by the roots pump in running, and as a result, the potential risk that a rotor is heated and expanded to result in locking as the roots pump is overheat can be completely solved, and lubricating oil in a shaft chamber of the end cover can be kept at a certain temperature for running.
Description
Technical field
The present invention relates to the technical field of Roots pump front and rear cover, specifically a kind of design of the end cap for full-cool Roots pump, the particularly mechanical structure of Roots pump end cap.
Background technique
At present, the Roots pump end cap is generally take oval or round-shaped as main.There are two very formidable deficiencys in Roots pump in operation, because Roots pump can not use separately as vacuum pump, need to be equipped with preevacuation pump, the fore vacuum pump intake needs in time to discharge the tolerance of Roots pump relief opening, otherwise can cause gas in the accumulation of Roots pump relief opening, form the relief opening of Roots pump and the pressure reduction of suction port.When pressure reduction is excessive, when the rotor of Roots pump carries out gas compression in exhaust side, need larger acting, according to gas compression thermal equilibrium, the gas compression acting is larger, and the heat of generation is also just larger.If these heats can not in time be removed or dispel the heat away, then heat is delivered to the rotor in the lobe pump body, the pump housing, and axle, on the end cap, and these metal partss are heated and can expand.When the temperature in the lobe pump body was more and more higher, the expansion meeting of these metal partss was larger, surpass rotor and the pump housing or and the Roots pump end cap between the gap and metal bump occurs, until rotor is stuck, cause the lobe pump body damage.
If roots pump rotor and the pump housing or and the Roots pump end cap between excesssive gap, the pressure reduction at two ends is then so that Roots pump entrance degree of vacuum will very large loss.If as seen the Roots pump entrance reaches very high degree of vacuum, need roots pump rotor and the pump housing or and end cap between the gap needs very little, but to be easy to form pressure reduction excessive but the gap is too small, the heat of compression can not in time be removed and cause rotor and the pump housing, end cap is stuck.Simultaneously concerning some harsh Environmental Conditions, the too high hidden danger that also can cause danger of pump housing surface temperature is to improve the Roots pump performance and use the core of safety crucial so in time remove Roots pump gas compression heat.
If can not in time remove the heat of compression simultaneously, this heat accumulative total causes cavity temperature rising in the lobe pump body, can pass to end cap, and further be delivered to the part of end caps, so that these parts comprise bearing, Sealing and lubricant oil will be located at high temperature to move, in case excess Temperature, will have a strong impact on the working life of this part, because such hidden danger is arranged, so existing Roots pump adopts piston ring to keep out lubricant oil between impeller and end cap and is splashed in the impeller, but not to seal fully after all, the vacuum needed time is longer so can occur reaching capacity, the insoluble problem of sour gas corrosion, yet if adopt mechanical seal, also be because hot operation, be difficult to guarantee its due working life, and change mechanical seal because dismounting and inconvenient is not the optimal selection of Roots pump so cause end caps to use mechanical seal.
Summary of the invention
The object of the present invention is to provide the full-cool end cover structure of a kind of convection current for novel Roots pump.How much octagonal end cap shells can maximum overcome the pressure of inner chamber and the active force of balance outside, special independently inside and outside two-layer cooling bath forms convection model when supporting the use with novel full-cool lobe pump body, can ensure enough cooling liquids and remove the Roots pump heat in when operation, thoroughly solve Roots pump because of overheated, the hidden danger that the rotor expanded by heating is stuck guarantees that simultaneously the lubricant oil in the end cap axocoel keeps certain running temperature.
To achieve these goals, technological scheme of the present invention is: the full-cool end cover structure of a kind of convection current for novel Roots pump, it comprises the end cap body, it is characterized in that: described end cap body is octagon how much, the end cap body internal surface forms the interior cooling bath of end cap of annular distribution, the end cap body internal surface in the cooling bath outside forms the outer cooling bath of end cap of annular distribution in this end cap, and the end cap body internal surface of cooling bath inboard forms two vacuum-sealing grooves that are symmetric in the end cap.
The invention discloses the full-cool end cover structure of a kind of convection current for novel Roots pump, this Roots pump end cover designs main points comprise geometry octagon end cap housing, vertical inside and outside two-layer cooling liquid bath, four guide tracks, vacuum-sealing groove and vacuum seal keys.How much octagon end caps are so that lobe pump body has more standby strength and stiffness.Independently two-layer cooling chamber can independently cool off the line of fall so that cooling liquid forms two, and formation convection model, support the use with the full-cool Roots pump of Novel clamp shell type, can ensure enough cooling liquids and remove the Roots pump heat in when operation, thoroughly solve Roots pump because of overheated, the hidden danger that the rotor expanded by heating is stuck guarantees that simultaneously the lubricant oil in the end cap axocoel keeps certain running temperature.
Description of drawings
Fig. 1 is end cap body structure schematic representation of the present invention.
Fig. 2 is end cap body sectional drawing of the present invention.
Fig. 3 is end cap base side pseudosection of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The invention discloses the full-cool end cover structure of a kind of convection current for novel Roots pump, it comprises end cap body 1, it is different from prior art and is: described end cap body 1 is octagon how much, the inner chamber of end cap body is oval, this shape can maximum overcome the pressure of inner chamber and the active force of balance outside, simultaneously so that the Roots pump profile seems more attractive in appearance and atmosphere.
In the specific implementation, end cap body 1 internal surface forms the interior cooling bath 2 of end cap of annular distribution, end cap body 1 internal surface in cooling bath 2 outsides forms the outer cooling bath 3 of end cap of annular distribution in this end cap, has designed special independently inside and outside two-layer cooling bath in the end cap of this novel Roots pump.When supporting the use with novel full-cool lobe pump body, cooling liquid in the novel full-cool lobe pump body chuck enters into respectively the inside and outside both sides cooling bath of Roots pump end cap by cooling liquid rail slot corresponding to end cap, and wherein the cooling liquid of the outer cooling bath of end cap is from the cooling liquid in lobe pump body suction port and the relief opening chuck.When Roots pump moves, relief opening is because the heat of compression produces higher temperature, and the relative relief opening of the temperature of suction port will be low many, this moment, the jacketed type cooling liquid was drawn the heat that transmits, then the coolant temperature in the relief opening chuck of bottom is higher, and the coolant temperature in the intakeport chuck at top is lower.Roots pump end cap bottom can be higher near the temperature of suction port side than Roots pump end cap top near the temperature of exhaust side, thereby the uniform temperature gradient that forms from bottom to top is poor.Outside end cap the special cooling liquid of cooling bath temperature gradient distribution under formed density difference, temperature is higher, density is then less, so under action of gravitation, bottom high temperature, low-density cooling liquid can upwards be floated, top low temperature, highdensity cooling liquid can be floated downwards, in the circulation canal of the pump housing of Roots pump and end cap and form a kind of thermoconvection phenomenon, balance heat.
In the specific implementation, described end cap body 1 internal surface both sides respectively are provided with two place's end cap guide tracks 5 near outer cooling bath 3 places of end cap, and the end cap guide track 5 of both sides distributes symmetrically.The cooling liquid of the interior cooling bath of this Roots pump end cap is by four uniform guide tracks of end cap, from the cooling liquid in other chucks of lobe pump body or directly from cooling water, this cooling medium not only provides cooling to part and lubricant oil in the Roots pump end cap after entering into the interior cooling bath of end cap, cooling liquid with the outer cooling bath of end cap forms the heat convection heat exchange at interior water jacket midfeather place more simultaneously, accelerate the movement of heat, namely accelerated the cooling effect of the heat of compression in the Roots pump.Namely the heat of compression of Roots pump relief opening by thermoconvection, be dispersed in uniformly lobe pump body and end cap, and flow into the outer cooling bath of end cap, utilizing colder cooling medium to enter cooling bath in the end cap, carry out convection heat exchange.Make it to remove comparatively rapidly these heats.The hotter cold outer cooling bath that goes liquid to enter into the Roots pump end cap simultaneously, the radiating fin by shell has also carried out fast heat-radiation heat-dissipating.So that the pump housing of Roots pump, inner chamber reaches a thermal equilibrium, operates in all the time under the suitable temperature, guarantees to place in the end cap of Roots pump the reliability of mechanical seal, stability and long working life.
Design by the above-mentioned type of cooling, liquid is taken away rapidly so that the gas compression heat of Roots pump is cooled, not only guaranteed temperature that pump housing surface is lower and satisfy less roots pump rotor and the pump housing or and end cap between the gap and overcome larger pressure reduction so that Roots pump allows the scope of use broader.
In the specific implementation, described end cap body 1 outer wall is distributed with radiating fin 6, realizes the housing heat radiation of end cap body 1.
In the specific implementation, described lid body 1 place offers coolant temperature exploration hole 7, by this exploration hole, can conveniently survey the true temperature of cooling liquid.
In the specific implementation, cooling bath 2 madial walls form two vacuum-sealing grooves that are symmetric 4 along end cap body 1 internal surface of locating in the end cap, and be provided with vacuum seal fitting key 8 in vacuum-sealing groove 4 inboards, the vacuum seal key of solid mechanical stationary seal ring is arranged in the axle inner chamber, fully different with other seal form such as piston ring packing that existing Roots pump is installed herein.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to above-mentioned these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. full-cool end cover structure of convection current that is used for novel Roots pump, it comprises end cap body (1), it is characterized in that: described end cap body (1) is octagon how much, end cap body (1) internal surface forms the interior cooling bath (2) of end cap of annular distribution, end cap body (1) internal surface in cooling bath (2) outside forms the outer cooling bath (3) of end cap of annular distribution in this end cap, and inboard end cap body (1) internal surface of cooling bath (2) forms two vacuum-sealing grooves that are symmetric (4) in the end cap.
2. full-cool end cover structure of convection current that is used for novel Roots pump, it is characterized in that: two place's end cap guide tracks (5) are located respectively to be provided with near the outer cooling bath (3) of end cap in described end cap body (1) internal surface both sides, and the end cap guide track (5) of both sides distributes symmetrically.
3. full-cool end cover structure of convection current that is used for novel Roots pump, it is characterized in that: described end cap body (1) outer wall is distributed with radiating fin (6).
4. full-cool end cover structure of convection current that is used for novel Roots pump, it is characterized in that: described lid body (1) locates to offer coolant temperature exploration hole (7).
5. full-cool end cover structure of convection current that is used for novel Roots pump, it is characterized in that: described vacuum-sealing groove (4) inboard is provided with vacuum seal fitting key (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100477552A CN103062063A (en) | 2013-01-19 | 2013-02-06 | Convection and fully-cooled type end cover structure for novel roots pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310019066 | 2013-01-19 | ||
| CN201310019066.0 | 2013-01-19 | ||
| CN2013100477552A CN103062063A (en) | 2013-01-19 | 2013-02-06 | Convection and fully-cooled type end cover structure for novel roots pump |
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| CN103062063A true CN103062063A (en) | 2013-04-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252908A (en) * | 2018-03-28 | 2018-07-06 | 西安交通大学 | A kind of self-balancing wet type lobe pump |
| CN108953155A (en) * | 2018-09-21 | 2018-12-07 | 江阴天田真空设备制造有限公司 | Lobe pump front and rear cover cooling structure |
| CN114458601A (en) * | 2021-12-29 | 2022-05-10 | 中科仪(南通)半导体设备有限责任公司 | Roots vacuum pump lubricating structure |
| CN116498553A (en) * | 2023-04-18 | 2023-07-28 | 北京通嘉宏瑞科技有限公司 | Vacuum pump stator assembly |
| GB2625582A (en) * | 2022-12-21 | 2024-06-26 | Leybold Gmbh | Vacuum pump |
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| JP2002115689A (en) * | 2000-10-12 | 2002-04-19 | Toyota Industries Corp | Cooling structure in vacuum pump |
| CN2625606Y (en) * | 2003-06-04 | 2004-07-14 | 上海萃曼真空机电制造有限公司 | Cooling structure for Root's vacuum pump |
| CN201330708Y (en) * | 2009-01-15 | 2009-10-21 | 上海沪冈真空泵制造有限公司 | Cooling structure for front/rear covers and end cover of Roots vacuum pump |
| CN102852798A (en) * | 2012-08-14 | 2013-01-02 | 杭州新安江工业泵有限公司 | Roots vacuum pump cooling system |
| CN203335406U (en) * | 2013-01-19 | 2013-12-11 | 上海零澜机械科技有限公司 | Convection all-cooling end cover structure for novel Roots pump |
-
2013
- 2013-02-06 CN CN2013100477552A patent/CN103062063A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002115689A (en) * | 2000-10-12 | 2002-04-19 | Toyota Industries Corp | Cooling structure in vacuum pump |
| CN2625606Y (en) * | 2003-06-04 | 2004-07-14 | 上海萃曼真空机电制造有限公司 | Cooling structure for Root's vacuum pump |
| CN201330708Y (en) * | 2009-01-15 | 2009-10-21 | 上海沪冈真空泵制造有限公司 | Cooling structure for front/rear covers and end cover of Roots vacuum pump |
| CN102852798A (en) * | 2012-08-14 | 2013-01-02 | 杭州新安江工业泵有限公司 | Roots vacuum pump cooling system |
| CN203335406U (en) * | 2013-01-19 | 2013-12-11 | 上海零澜机械科技有限公司 | Convection all-cooling end cover structure for novel Roots pump |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252908A (en) * | 2018-03-28 | 2018-07-06 | 西安交通大学 | A kind of self-balancing wet type lobe pump |
| CN108252908B (en) * | 2018-03-28 | 2024-03-29 | 西安交通大学 | Self-balancing wet Roots pump |
| CN108953155A (en) * | 2018-09-21 | 2018-12-07 | 江阴天田真空设备制造有限公司 | Lobe pump front and rear cover cooling structure |
| CN108953155B (en) * | 2018-09-21 | 2024-05-10 | 江阴天田真空设备制造有限公司 | Cooling structure for front end cover and rear end cover of Roots pump |
| CN114458601A (en) * | 2021-12-29 | 2022-05-10 | 中科仪(南通)半导体设备有限责任公司 | Roots vacuum pump lubricating structure |
| CN114458601B (en) * | 2021-12-29 | 2022-12-16 | 中科仪(南通)半导体设备有限责任公司 | Roots vacuum pump lubricating structure |
| GB2625582A (en) * | 2022-12-21 | 2024-06-26 | Leybold Gmbh | Vacuum pump |
| CN116498553A (en) * | 2023-04-18 | 2023-07-28 | 北京通嘉宏瑞科技有限公司 | Vacuum pump stator assembly |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Baihe Town, Qingpu District, Shanghai city 2963 201709 waiqingsong Highway No. 2 Lane 6 Building second layer Applicant after: ELIVAC COMPANY, LTD. Applicant after: Xiao Ran Address before: Baihe Town, Qingpu District, Shanghai city 2963 201709 waiqingsong Highway No. 2 Lane 6 Building second layer Applicant before: ELIVAC (Shanghai) Co., Ltd. Applicant before: Xiao Ran |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SHANGHAI ELIVAC COMPANY, LTD. TO: SHANGHAI ELIVAC VACUUM TECHNOLOGY CO., LTD. |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130424 |
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| WD01 | Invention patent application deemed withdrawn after publication |