CN203335406U - Convection all-cooling end cover structure for novel Roots pump - Google Patents
Convection all-cooling end cover structure for novel Roots pump Download PDFInfo
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- CN203335406U CN203335406U CN2013200695529U CN201320069552U CN203335406U CN 203335406 U CN203335406 U CN 203335406U CN 2013200695529 U CN2013200695529 U CN 2013200695529U CN 201320069552 U CN201320069552 U CN 201320069552U CN 203335406 U CN203335406 U CN 203335406U
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- end cover
- end cap
- roots pump
- cooling
- internal surface
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Abstract
The utility model relates to a convection all-cooling end cover structure for a novel Roots pump, which comprises an end cover body. The utility model is characterized in that the end cover body is in a geometrically octagonal shape; an annularly distributed end cover internal cooling groove is formed on the internal surface of the end cover body; an annularly distributed end cover external cooling groove is formed on the internal surface of the end cover body on the outer side of the end cover internal cooling groove; and two symmetrically distributed vacuum seal grooves are formed on the internal surface of the end cover body on the inner side of the end cover internal cooling groove. The geometrically octagonal end cover enables the Roots pump body to have higher strength and rigidity. The two independent cooling chamber layers can enable the coolant to form two independent cooling routes and form a convection mode; and when being matched with the novel jacket-type all-cooling Roots pump, the convection all-cooling end cover structure can ensure that the coolant is sufficient to take the heat generated in the Roots pump operation process away, thereby thoroughly solving the hidden danger of choking due to heat expansion of the rotor when the Roots pump is overheated, and ensuring a certain operation temperature of the lubricating oil in the end cover shaft cavity.
Description
Technical field
The utility model 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 generally be 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 to discharge in time 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 be removed in time or dispel the heat away, heat is delivered to the rotor in lobe pump body, the pump housing, and axle, on end cap, and these metal partss are heated and can expand.When the temperature in lobe pump body is more and more higher, the expansion meeting of these metal partss is larger, surpass rotor and the pump housing or and the Roots pump end cap between 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 makes the loss that Roots pump entrance degree of vacuum will be very large.If visible 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 gap is too small, but to be easy to form pressure reduction excessive, the heat of compression can not be removed in time and cause rotor and the pump housing, end cap is stuck.Concerning some harsh Environmental Conditions, pump housing surface temperature is too high also can cause dangerous hidden danger, so remove in time Roots pump gas compression heat, is improve the Roots pump performance and use safe core key simultaneously.
If can not remove in time the heat of compression simultaneously, this heat accumulative total causes cavity temperature in lobe pump body to raise, can pass to end cap, and further be delivered to the part of end caps, make these parts comprise bearing, Sealing and lubricant oil will be located at high temperature to move, once excess Temperature, will have a strong impact on the working life of this part, due to such hidden danger being arranged, so existing Roots pump adopts piston ring to keep out during lubricant oil is splashed into impeller between impeller and end cap, but not to seal fully after all, so there will be the vacuum needed time that reaches capacity longer, the insoluble problem of sour gas corrosion, if yet adopt mechanical seal, also because hot operation, be difficult to guarantee its due working life, and change mechanical seal because dismounting and inconvenient, so causing end caps to use mechanical seal is not the optimal selection of Roots pump.
The model utility content
The purpose of this utility model is to provide a kind of convection current for novel Roots pump full-cool end cover structure.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 the lubricant oil in the end cap axocoel keeps certain running temperature simultaneously.
To achieve these goals, the technical solution of the utility model 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, in this end cap, the end cap body internal surface in the cooling bath outside forms the outer cooling bath of end cap of annular distribution, and in end cap, the end cap body internal surface of cooling bath inboard forms two vacuum-sealing grooves that are symmetric.
The utility model 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 make lobe pump body have more standby strength and stiffness.Independently two-layer cooling chamber can be so that cooling liquid forms two independently cooling line of falls, and formation convection model, with the full-cool Roots pump of Novel clamp shell type, support the use, 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 the lubricant oil in the end cap axocoel keeps certain running temperature simultaneously.
The accompanying drawing explanation
Fig. 1 is the utility model end cap body structure schematic diagram.
Fig. 2 is the utility model end cap body sectional drawing.
Fig. 3 is the utility model end cap base side pseudosection.
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
The utility model 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, makes Roots pump the profile more attractive in appearance and atmosphere that seems simultaneously.
In the specific implementation, end cap body 1 internal surface forms the interior cooling bath 2 of end cap of annular distribution, in this end cap, end cap body 1 internal surface in cooling bath 2 outsides forms the outer cooling bath 3 of end cap of annular distribution, 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, the cooling liquid cooling liquid rail slot corresponding by end cap in novel full-cool lobe pump body chuck enters into respectively the inside and outside both sides cooling bath of Roots pump 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 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, now the jacketed type cooling liquid is drawn the heat transmitted, 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 formed 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 less, so under the effect of gravity, 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 the outer cooling bath of end cap 3 places, 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, form the heat convection heat exchange at interior water jacket midfeather place with the cooling liquid of the outer cooling bath of end cap more simultaneously, accelerate the movement of heat, accelerated the cooling effect of the heat of compression in Roots pump.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 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 heat-radiation heat-dissipating fast.Make the pump housing of Roots pump, inner chamber reaches a thermal equilibrium, operates in all the time at a suitable temperature, guarantees to place reliability, stability and the longer working life of mechanical seal in the end cap of Roots pump.
Design by the above-mentioned type of cooling, make the gas compression heat of the Roots pump liquid that is cooled take away rapidly, not only guaranteed temperature that pump housing surface is lower and meet less roots pump rotor and the pump housing or and end cap between gap and overcome larger pressure reduction, make Roots pump allow 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, in end cap, cooling bath 2 madial walls form two vacuum-sealing grooves that are symmetric 4 along end cap body 1 internal surface of locating, 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 in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that the concrete enforcement of the utility model is confined to above-mentioned these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. the full-cool end cover structure of the convection current 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, in this end cap, end cap body (1) internal surface in cooling bath (2) outside forms the outer cooling bath (3) of end cap of annular distribution, and in end cap, inboard end cap body (1) internal surface of cooling bath (2) forms two vacuum-sealing grooves that are symmetric (4).
2. the full-cool end cover structure of a kind of convection current for novel Roots pump according to claim 1, 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. the full-cool end cover structure of a kind of convection current for novel Roots pump according to claim 1, it is characterized in that: described end cap body (1) outer wall is distributed with radiating fin (6).
4. the full-cool end cover structure of a kind of convection current for novel Roots pump according to claim 1, it is characterized in that: described lid body (1) locates to offer coolant temperature exploration hole (7).
5. the full-cool end cover structure of a kind of convection current for novel Roots pump according to claim 1, 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 |
|---|---|---|---|
| CN2013200695529U CN203335406U (en) | 2013-01-19 | 2013-02-06 | Convection all-cooling end cover structure for novel Roots pump |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320027562 | 2013-01-19 | ||
| CN201320027562.6 | 2013-01-19 | ||
| CN2013200695529U CN203335406U (en) | 2013-01-19 | 2013-02-06 | Convection all-cooling end cover structure for novel Roots pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335406U true CN203335406U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200695529U Expired - Fee Related CN203335406U (en) | 2013-01-19 | 2013-02-06 | Convection all-cooling end cover structure for novel Roots pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062063A (en) * | 2013-01-19 | 2013-04-24 | 上海零澜机械科技有限公司 | Convection and fully-cooled type end cover structure for novel roots pump |
| CN105649993A (en) * | 2015-06-18 | 2016-06-08 | 上海伊莱茨真空技术有限公司 | Double-clip type vacuum jacket flange plate |
-
2013
- 2013-02-06 CN CN2013200695529U patent/CN203335406U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062063A (en) * | 2013-01-19 | 2013-04-24 | 上海零澜机械科技有限公司 | Convection and fully-cooled type end cover structure for novel roots pump |
| CN105649993A (en) * | 2015-06-18 | 2016-06-08 | 上海伊莱茨真空技术有限公司 | Double-clip type vacuum jacket flange plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI ELIVAC VACUUM TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANGHAI ELIVAC COMPANY, LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Baihe Town, Qingpu District, Shanghai city 2963 201709 waiqingsong Highway No. 2 Lane 6 Building second layer Patentee after: ELIVAC COMPANY, LTD. Patentee after: Xiao Ran Address before: Baihe Town, Qingpu District, Shanghai city 2963 201709 waiqingsong Highway No. 2 Lane 6 Building second layer Patentee before: ELIVAC (Shanghai) Co., Ltd. Patentee before: Xiao Ran |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20170206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |