CN113309701B - Roots vacuum pump - Google Patents
Roots vacuum pump Download PDFInfo
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- CN113309701B CN113309701B CN202110775713.5A CN202110775713A CN113309701B CN 113309701 B CN113309701 B CN 113309701B CN 202110775713 A CN202110775713 A CN 202110775713A CN 113309701 B CN113309701 B CN 113309701B
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- China
- Prior art keywords
- cooling
- air outlet
- shell
- vacuum pump
- roots vacuum
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- 238000001816 cooling Methods 0.000 claims abstract description 106
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000009423 ventilation Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 74
- 239000000498 cooling water Substances 0.000 description 39
- 229910052742 iron Inorganic materials 0.000 description 37
- 239000002893 slag Substances 0.000 description 37
- 230000000903 blocking effect Effects 0.000 description 33
- 230000017525 heat dissipation Effects 0.000 description 9
- 239000012208 gear oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- 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
-
- 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
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a Roots vacuum pump, which belongs to the technical field of Roots vacuum pumps and comprises a shell, wherein a first cooling groove and a second cooling groove are arranged in the shell, a water inlet and a water outlet are arranged on the shell, the water inlet is connected with the first cooling groove, the water outlet is connected with the second cooling groove, a transfer cavity is arranged between the first cooling groove and the second cooling groove, access holes are arranged at the bottom of the shell, the number of the access holes is the same as that of the transfer cavities, the access holes are communicated with the transfer cavity, and an access cover is arranged on the access holes; through the setting in first cooling tank and second cooling tank, can cool down the roots vacuum pump, avoid the high temperature to lead to metal part thermal expansion, take place the metal to bump the wiper to appear the phenomenon of seizure, locking, the problem of roots vacuum pump operation trouble appears, avoid simultaneously leading to the bearing life in the roots pump to descend because of the high temperature.
Description
Technical Field
The invention belongs to the technical field of Roots vacuum pumps; in particular to a Roots vacuum pump.
Background
The Roots vacuum pump can generate a large amount of heat during working, if the heat can not be removed or dissipated in time, the heat is transferred to the Roots rotor and the pump shell in the Roots vacuum pump, so that the temperature of the components is very high, the metal components are expanded when heated, the thermal displacement finally exceeds the rotor and the pump body, and the metal friction occurs, so that the phenomena of seizure and locking occur, and the problem of running failure of the Roots vacuum pump occurs. Meanwhile, the service life of a bearing in the Roots pump is reduced due to the fact that the temperature is too high, meshing degree is reduced after the gear is heated and expanded, abnormal sound is generated, and the gear oil is easy to oxidize and deteriorate after the temperature is too high, so that the service life is reduced;
at present, most Roots vacuum pumps are cooled by inputting cooling water into the Roots vacuum pumps, and the method can ensure good sealing performance between the shell and the inner sleeve while having good heat dissipation effect on the inner sleeve, but at present, the Roots pumps in the market are mostly made of cast iron materials, and the cooling cavity inside the Roots pumps is easy to drop residues in the use process, and the cooling water channel is easy to be blocked due to metal residues in the cooling cavity of the pump.
Disclosure of Invention
The invention aims to provide a Roots vacuum pump, which solves the following problems:
1. the Roots vacuum pump can generate a large amount of heat during working, if the heat cannot be removed or radiated in time, the problem of running failure of the Roots vacuum pump can occur, and meanwhile, the service life of a bearing in the Roots pump is reduced due to the excessively high temperature;
2. the cooling cavity inside the Roots vacuum pump is easy to drop residues and easily block the cooling water channel in the use process.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a roots vacuum pump, includes the shell, be equipped with first cooling tank and second cooling tank in the shell, be equipped with water inlet and delivery port on the shell, the water inlet is connected with first cooling tank, the delivery port is connected with the second cooling tank, be equipped with the switching chamber between first cooling tank and the second cooling tank, the shell bottom is equipped with the access hole, the access hole is the same with switching chamber quantity, and the access hole is linked together with the switching chamber, be equipped with the access cover on the access hole.
Further, the shell lower extreme is equipped with the air inlet, the shell upper end is equipped with the gas outlet, fixedly connected with first ring flange on the air inlet, fixedly connected with second ring flange on the gas outlet, be equipped with the rotor chamber in the shell, the rotor chamber is connected with the air inlet and gas outlet respectively, be equipped with the rotor in the rotor chamber, fixedly connected with connecting device on the shell.
Further, the first cooling groove is positioned inside the second cooling groove.
Further, the transfer cavity is positioned at the lowest point of the first cooling groove and the second cooling groove.
Further, the switching chamber includes spread groove, first filter screen and hinders back piece, first filter screen fixed connection is on the spread groove inner wall, and the tie point of first filter screen and spread groove inner wall is located the position that is close to the second cooling tank, hinder back piece fixed connection on the spread groove inner wall, and hinder back piece and spread groove inner wall's tie point and be located the position that is close to first cooling tank, hinder back piece's cross-section and be the arc, it is equipped with the second filter screen to hinder back on the piece, hinder back piece bottom fixedly connected with barb.
Further, a magnet is fixedly connected in the access cover.
Further, a plurality of radiating fins are fixedly connected to the shell, the radiating fins are located around the air outlet, and one end of each radiating fin penetrates through the outer wall of the air outlet and is fixed on the surface of the inner wall of the air outlet.
Further, a ventilation pipeline is arranged in the shell, a fan is fixedly connected to the shell, and an air outlet of the fan is connected with the ventilation pipeline.
Further, the ventilation pipeline comprises an air inlet, an air inlet branch pipe, an annular ventilation pipe, a first air outlet and a second air outlet;
the air inlet is communicated with an air inlet branch pipe, the air inlet branch pipe is communicated with an annular ventilation pipe, the annular ventilation pipe is communicated with a plurality of first air outlets, the annular ventilation pipe is communicated with a plurality of second air outlets, and the communicated positions of the first air outlets and the second air outlets are the same as those of the annular ventilation pipe.
Further, the first air outlet and the second air outlet are positioned between two adjacent radiating fins, and the number of the first air outlet, the number of the second air outlet and the number of the radiating fins are the same.
The invention has the beneficial effects that: the first cooling tank is arranged at the inner side of the second cooling tank, and cooling water cools the shell in the first cooling tank, so that the temperature of the cooling water entering the second cooling tank is increased, the temperature difference between the outer wall of the shell and air is reduced, and the phenomenon that water drops are attached to the shell due to the fact that the temperature of the shell is too low is avoided; through the arrangement of the first cooling tank and the second cooling tank, the Roots vacuum pump can be cooled, metal parts are prevented from being heated and expanded due to overhigh temperature, metal friction occurs, so that seizure and locking phenomena occur, the problem of running failure of the Roots vacuum pump occurs, and meanwhile, the reduction of the service life of a bearing in the Roots pump due to overhigh temperature is avoided; the problems that the gear oil is easy to oxidize and deteriorate after the temperature is too high and the service life is shortened are avoided;
the first filter screen is arranged on the inner wall of the connecting groove, so that iron slag contained in the cooling water is filtered, and the iron slag can fall into the access cover; the return blocking block is arranged on the inner wall of the connecting groove, a second filter screen is arranged on the return blocking block, the bottom of the return blocking block is fixedly connected with a barb, and the cooling water is prevented from entering the overhaul port to cause the iron slag to flow out of the overhaul port; through the arrangement of the overhaul port, the iron slag is prevented from blocking the connecting groove; the magnet is arranged in the access cover, so that the iron slag in the access opening is fixed through the magnet, the quantity of the iron slag brought up by cooling water entering the access opening is greatly reduced, and then the iron slag is blocked by the blocking block, so that the problem that the iron slag flows out of the access opening is solved;
through arranging the radiating fins on the shell, one end of each radiating fin penetrates through the outer wall of the air outlet and is fixed on the inner wall surface of the air outlet, the air outlet is further radiated, metal collision is avoided, metal parts are heated and expanded due to overhigh temperature, the phenomena of seizure and locking are avoided, the problem of running failure of the Roots vacuum pump is solved, and meanwhile, the service life of a bearing in the Roots pump is prolonged due to overhigh temperature; through set up air pipe and fan in the shell, be connected the air outlet and the air pipe of fan again, blow radiating fin through fan and air pipe for radiating fin's heat dissipation improves radiating fin's radiating efficiency.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a top view of an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a second embodiment of the present invention;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a third cross-sectional view of an embodiment of the present invention;
FIG. 7 is a top view of a third embodiment of the present invention;
FIG. 8 is a cross-sectional view of a fourth embodiment of the present invention;
FIG. 9 is a top view of a fourth embodiment of the present invention;
FIG. 10 is a cross-sectional view of a four-ring vent, a first air outlet, and a second air outlet according to an embodiment of the invention;
fig. 11 is an enlarged view at C in fig. 8.
In the figure: 1. a housing; 2. an air inlet; 3. an air outlet; 4. a first flange; 5. a second flange; 6. a rotor cavity; 7. a rotor; 8. a connecting device; 9. a first cooling tank; 10. a second cooling tank; 11. a water inlet; 12. a water outlet; 13. a transfer cavity; 14. an access opening; 15. an access cover; 16. a connecting groove; 17. a first filter screen; 18. a return blocking block; 19. a second filter screen; 20. a barb; 21. a magnet; 22. a heat radiation fin; 23. a ventilation duct; 24. a fan; 25. an air inlet; 26. an air inlet branch pipe; 27. an annular vent tube; 28. a first air outlet; 29. and a second air outlet.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: as shown in fig. 1-3, a Roots vacuum pump comprises a housing 1, wherein an air inlet 2 is arranged at the lower end of the housing 1, an air outlet 3 is arranged at the upper end of the housing 1, a first flange 4 is fixedly connected to the air inlet 2, a second flange 5 is fixedly connected to the air outlet 3, a rotor cavity 6 is arranged in the housing 1, the rotor cavity 6 is respectively connected with the air inlet 2 and the air outlet 3, a rotor 7 is arranged in the rotor cavity 6, a connecting device 8 is fixedly connected to the housing 1, the connecting device 8 is used for being connected with a motor and other devices to drive the rotor 7 to rotate, and the connecting device 8 is a common device and is not an innovation point of the invention, so that the detailed description is omitted, and the Roots vacuum pump connecting device 8 is commonly used in the market;
the first cooling groove 9 and the second cooling groove 10 are arranged in the shell 1, the first cooling groove 9 is positioned at the inner side of the second cooling groove 10, and cooling water cools the shell 1 in the first cooling groove 9 by arranging the first cooling groove 9 at the inner side of the second cooling groove 10, so that the temperature of the cooling water entering the second cooling groove 10 is increased, the temperature difference between the outer wall of the shell 1 and air is reduced, and the phenomenon that water drops are attached to the shell 1 due to the fact that the temperature of the shell 1 is too low is avoided; the shell 1 is provided with a water inlet 11 and a water outlet 12, the water inlet 11 is connected with the first cooling tank 9, the water outlet 12 is connected with the second cooling tank 10, a transfer cavity 13 is arranged between the first cooling tank 9 and the second cooling tank 10, the transfer cavity 13 is used for communicating the first cooling tank 9 and the second cooling tank 10, the transfer cavity 13 is positioned at the lowest point of the first cooling tank 9 and the second cooling tank 10, the bottom of the shell 1 is provided with an access hole 14, the number of the access holes 14 is the same as that of the transfer cavities 13, the access holes 14 are communicated with the transfer cavities 13, and the access hole 14 is provided with an access cover 15;
through the arrangement of the first cooling tank 9 and the second cooling tank 10, the Roots vacuum pump can be cooled, metal parts are prevented from being heated and expanded due to overhigh temperature, metal friction is generated, so that seizure and locking phenomena occur, the problem of running failure of the Roots vacuum pump is solved, and the reduction of the service life of a bearing in the Roots pump due to overhigh temperature is avoided; the problems that the gear oil is easy to oxidize and deteriorate after the temperature is too high and the service life is shortened are avoided;
the transfer cavity 13 comprises a connecting groove 16, a first filter screen 17 and a return blocking block 18, wherein the first filter screen 17 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the first filter screen 17 and the inner wall of the connecting groove 16 is positioned close to the position of the second cooling groove 10, the first filter screen 17 is used for filtering iron slag contained in cooling water, the return blocking block 18 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the return blocking block 18 and the inner wall of the connecting groove 16 is positioned close to the position of the first cooling groove 9, the section of the return blocking block 18 is arc-shaped, the second filter screen 19 is arranged on the return blocking block 18, and a barb 20 is fixedly connected to the bottom of the return blocking block 18;
the first filter screen 17 is arranged on the inner wall of the connecting groove 16 to filter the iron slag contained in the cooling water so that the iron slag can fall into the access cover 15; the return blocking block 18 is arranged on the inner wall of the connecting groove 16, a second filter screen 19 is arranged on the return blocking block 18, the bottom is fixedly connected with a barb 20, and the cooling water is prevented from entering the overhaul port 14 to cause the iron slag to flow out of the overhaul port 14; by arranging the overhaul port 14, the iron slag is prevented from blocking the connecting groove 16;
cooling water is injected from the water inlet 11, the cooling water enters the first cooling tank 9 to cool the shell 1, iron slag falling off from the inner wall of the first cooling tank 9 flows along with the cooling water, when the cooling water enters the connecting tank 16 from the first cooling tank 9, the cooling water flows along the return blocking block 18, then a part of the cooling water impacts the inside of the first filter screen 17, the first filter screen 17 filters the iron slag contained in the cooling water, and the iron slag filtered by the first filter screen 17 falls into the access cover 15 due to self weight; the other part of cooling water enters the access hole 14 to cause rollback, the cooling water reenters the connecting groove 16 through the second filter screen 19, and prevents the iron slag in the access cover 15 from being separated from the access hole 14, the barbs 20 further block the iron slag attached to the inner wall of the second cooling groove 10 by the cooling water entering the second cooling groove 10, the iron slag in the second cooling groove 10 falls into the access cover 15 due to self weight, and finally the cooling water in the second cooling groove 10 flows out from the water outlet 12; when the iron slag needs to be cleaned, the Roots vacuum pump is turned off, cooling water is stopped from being input, the access cover 15 is opened, the iron slag in the access opening 14 is cleaned, and after the cleaning is finished, the access cover 15 is fixed on the access opening 14 again.
Embodiment two: as shown in fig. 4 to 5, the present embodiment is different from the first embodiment in that: the switching cavity 13 is positioned at the lowest point of the first cooling tank 9 and the second cooling tank 10, the bottom of the shell 1 is provided with the overhaul holes 14, the number of the overhaul holes 14 is the same as that of the switching cavities 13, the overhaul holes 14 are communicated with the switching cavities 13, the overhaul holes 14 are provided with the overhaul covers 15, and the magnets 21 are fixedly connected in the overhaul covers 15;
because cooling water enters the access hole 14 to cause rollback, iron slag in the access hole 14 is carried up, and through arranging the return blocking block 18 on the inner wall of the connecting groove 16, a second filter screen 19 is arranged on the return blocking block 18, and barbs 20 are fixedly connected to the bottom of the return blocking block, the cooling water can be prevented from entering the access hole 14 to cause the iron slag to flow out of the access hole 14; however, part of the iron slag flows out from the overhaul port 14 to influence the filtering effect; by arranging the magnet 21 in the access cover 15, the iron slag in the access opening 14 is fixed through the magnet 21, so that the quantity of the iron slag brought up by cooling water entering the access opening 14 is greatly reduced, and the iron slag is blocked by the blocking block 18, so that the problem that the iron slag flows out of the access opening 14 is solved.
Embodiment III: as shown in fig. 5-7, the Roots vacuum pump comprises a shell 1, wherein an air inlet 2 is arranged at the lower end of the shell 1, an air outlet 3 is arranged at the upper end of the shell 1, a first flange 4 is fixedly connected to the air inlet 2, a second flange 5 is fixedly connected to the air outlet 3, a rotor cavity 6 is arranged in the shell 1, the rotor cavity 6 is respectively connected with the air inlet 2 and the air outlet 3, a rotor 7 is arranged in the rotor cavity 6, and a connecting device 8 is fixedly connected to the shell 1;
the shell 1 is internally provided with a first cooling tank 9 and a second cooling tank 10, the first cooling tank 9 is positioned at the inner side of the second cooling tank 10, the shell 1 is provided with a water inlet 11 and a water outlet 12, the water inlet 11 is connected with the first cooling tank 9, the water outlet 12 is connected with the second cooling tank 10, a switching cavity 13 is arranged between the first cooling tank 9 and the second cooling tank 10, the switching cavity 13 is positioned at the lowest point of the first cooling tank 9 and the second cooling tank 10, the bottom of the shell 1 is provided with an access hole 14, the number of the access holes 14 is the same as that of the switching cavities 13, the access hole 14 is communicated with the switching cavity 13, the access hole 14 is provided with an access cover 15, and a magnet 21 is fixedly connected in the access cover 15;
the transfer cavity 13 comprises a connecting groove 16, a first filter screen 17 and a return blocking block 18, wherein the first filter screen 17 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the first filter screen 17 and the inner wall of the connecting groove 16 is positioned close to the position of the second cooling groove 10, the return blocking block 18 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the return blocking block 18 and the inner wall of the connecting groove 16 is positioned close to the position of the first cooling groove 9, the section of the return blocking block 18 is arc-shaped, the second filter screen 19 is arranged on the return blocking block 18, and the bottom of the return blocking block 18 is fixedly connected with a barb 20;
the present embodiment is different from the second embodiment in that: a plurality of radiating fins 22 are fixedly connected to the shell 1, the radiating fins 22 are positioned around the air outlet 3, and one end of each radiating fin 22 penetrates through the outer wall of the air outlet 3 and is fixed on the surface of the inner wall of the air outlet 3;
because when the pressure difference between the air outlet 3 and the air inlet 2 of the Roots vacuum pump is too large or the compression ratio is too high, the heat generated by compression of the air at the air outlet side of the rotor 7 of the Roots vacuum pump is larger, the temperature at the air outlet 3 is highest, and the cooling is only carried out through cooling water, and the cooling requirement can not be met under special conditions, therefore, by arranging the radiating fins 22 on the shell 1, one end of each radiating fin 22 passes through the outer wall of the air outlet 3 and is fixed on the inner wall surface of the air outlet 3, the air outlet 3 is further radiated, the problem that the running failure of the Roots vacuum pump occurs due to the fact that metal parts are heated and expanded due to the fact that the temperature is too high, the phenomena of seizure and locking occur is avoided, and meanwhile, the service life of a bearing in the Roots vacuum pump is reduced due to the too high temperature is avoided.
Embodiment four: as shown in fig. 5 and 8-11, a Roots vacuum pump comprises a shell 1, wherein an air inlet 2 is arranged at the lower end of the shell 1, an air outlet 3 is arranged at the upper end of the shell 1, a first flange 4 is fixedly connected to the air inlet 2, a second flange 5 is fixedly connected to the air outlet 3, a rotor cavity 6 is arranged in the shell 1, the rotor cavity 6 is respectively connected with the air inlet 2 and the air outlet 3, a rotor 7 is arranged in the rotor cavity 6, and a connecting device 8 is fixedly connected to the shell 1;
the shell 1 is internally provided with a first cooling tank 9 and a second cooling tank 10, the first cooling tank 9 is positioned at the inner side of the second cooling tank 10, the shell 1 is provided with a water inlet 11 and a water outlet 12, the water inlet 11 is connected with the first cooling tank 9, the water outlet 12 is connected with the second cooling tank 10, a switching cavity 13 is arranged between the first cooling tank 9 and the second cooling tank 10, the switching cavity 13 is positioned at the lowest point of the first cooling tank 9 and the second cooling tank 10, the bottom of the shell 1 is provided with an access hole 14, the number of the access holes 14 is the same as that of the switching cavities 13, the access hole 14 is communicated with the switching cavity 13, the access hole 14 is provided with an access cover 15, and a magnet 21 is fixedly connected in the access cover 15;
the transfer cavity 13 comprises a connecting groove 16, a first filter screen 17 and a return blocking block 18, wherein the first filter screen 17 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the first filter screen 17 and the inner wall of the connecting groove 16 is positioned close to the position of the second cooling groove 10, the return blocking block 18 is fixedly connected to the inner wall of the connecting groove 16, the connection point of the return blocking block 18 and the inner wall of the connecting groove 16 is positioned close to the position of the first cooling groove 9, the section of the return blocking block 18 is arc-shaped, the second filter screen 19 is arranged on the return blocking block 18, and the bottom of the return blocking block 18 is fixedly connected with a barb 20;
a plurality of radiating fins 22 are fixedly connected to the shell 1, the radiating fins 22 are positioned around the air outlet 3, and one end of each radiating fin 22 penetrates through the outer wall of the air outlet 3 and is fixed on the surface of the inner wall of the air outlet 3;
the present embodiment is different from the third embodiment in that: the shell 1 is internally provided with a ventilation pipeline 23, the shell 1 is fixedly connected with a fan 24, the air outlet of the fan 24 is connected with the ventilation pipeline 23, the air outlet of the fan 24 is like a funnel, and the air of the fan 24 is collected together and blown into the ventilation pipeline 23;
the ventilation pipeline 23 comprises an air inlet 25, an air inlet branch pipe 26, an annular ventilation pipe 27, a first air outlet 28 and a second air outlet 29;
the air inlet 25 is communicated with the air inlet branch pipe 26, the air inlet branch pipe 26 is communicated with the annular ventilation pipe 27, the annular ventilation pipe 27 is communicated with the first air outlets 28 of a plurality of, the annular ventilation pipe 27 is communicated with the second air outlets 29 of a plurality of, the positions of the first air outlets 28 and the second air outlets 29 communicated with the annular ventilation pipe 27 are the same, the first air outlets 28 and the second air outlets 29 are positioned between two adjacent radiating fins 22, and the number of the first air outlets 28, the second air outlets 29 and the number of the radiating fins 22 are the same.
Because most working environments of the Roots vacuum pump have no wind, the heat dissipation efficiency of the heat dissipation fins 22 is not in an optimal state, and the air outlet of the fan 24 is connected with the air duct 23 by arranging the air duct 23 and the fan 24 in the shell 1, so that the air is blown to the heat dissipation fins 22 through the fan 24 and the air duct 23, the heat dissipation of the heat dissipation fins 22 is quickened, and the heat dissipation efficiency of the heat dissipation fins 22 is improved.
When the cooling device is used, cooling water is injected from the water inlet 11, enters the first cooling tank 9 to cool the shell 1, iron slag falling off from the inner wall of the first cooling tank 9 flows along with the cooling water, when the cooling water enters the connecting tank 16 from the first cooling tank 9, flows along the return blocking block 18, then a part of the cooling water impacts the inside of the first filter screen 17, the first filter screen 17 filters the iron slag contained in the cooling water, and the iron slag filtered by the first filter screen 17 falls into the access cover 15 due to self weight; the magnet 21 fixes the iron slag in the access hole 14, the other part of cooling water enters the access hole 14 to cause rollback, the cooling water reenters the connecting groove 16 through the second filter screen 19 and prevents the iron slag in the access cover 15 from separating from the access hole 14, the barbs 20 further block the iron slag attached to the inner wall of the second cooling groove 10 by the cooling water in the second cooling groove 10, the iron slag in the second cooling groove 10 falls into the access cover 15 due to self weight, and finally the cooling water in the second cooling groove 10 flows out from the water outlet 12;
starting the fan 24, enabling the wind generated by the fan 24 to enter the air inlet 25, sequentially passing through the air inlet branch pipe 26 and the annular ventilation pipe 27, finally blowing out from the first air outlet 28 and the second air outlet 29, blowing onto the adjacent radiating fins 22, and radiating the air outlet 3 by the radiating fins 22; when the iron slag needs to be cleaned, the Roots vacuum pump is turned off, cooling water is stopped from being input, the access cover 15 is opened, the iron slag in the access opening 14 is cleaned, and after the cleaning is finished, the access cover 15 is fixed on the access opening 14 again.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The Roots vacuum pump comprises a shell (1), and is characterized in that a first cooling groove (9) and a second cooling groove (10) are formed in the shell (1), a transfer cavity (13) is formed between the first cooling groove (9) and the second cooling groove (10), overhaul holes (14) are formed in the bottom of the shell (1), the number of the overhaul holes (14) is the same as that of the transfer cavities (13), the overhaul holes (14) are communicated with the transfer cavities (13), and an overhaul cover (15) is arranged on the overhaul holes (14);
the first cooling tank (9) is positioned at the inner side of the second cooling tank (10), the shell (1) is provided with a water inlet (11) and a water outlet (12), the water inlet (11) is connected with the first cooling tank (9), and the water outlet (12) is connected with the second cooling tank (10);
the switching cavity (13) is positioned at the lowest point of the first cooling groove (9) and the second cooling groove (10);
the switching chamber (13) is including spread groove (16), first filter screen (17) and block back piece (18), first filter screen (17) fixed connection is on spread groove (16) inner wall, and the tie point of first filter screen (17) and spread groove (16) inner wall is located the position that is close to second cooling tank (10), block back piece (18) fixed connection is on spread groove (16) inner wall, and block back piece (18) and the tie point of spread groove (16) inner wall be located the position that is close to first cooling tank (9), the cross-section of block back piece (18) is the arc, be equipped with second filter screen (19) on block back piece (18), block back piece (18) bottom fixedly connected with barb (20).
2. The Roots vacuum pump according to claim 1, wherein the lower end of the housing (1) is provided with an air inlet (2), the upper end of the housing (1) is provided with an air outlet (3), the air inlet (2) is fixedly connected with a first flange plate (4), the air outlet (3) is fixedly connected with a second flange plate (5), a rotor cavity (6) is arranged in the housing (1), the rotor cavity (6) is respectively connected with the air inlet (2) and the air outlet (3), and a rotor (7) is arranged in the rotor cavity (6).
3. A roots vacuum pump according to claim 1, characterized in that a magnet (21) is fixedly connected in the access cover (15).
4. The Roots vacuum pump according to claim 1, wherein a plurality of radiating fins (22) are fixedly connected to the housing (1), the plurality of radiating fins (22) are located around the air outlet (3), and one end of each radiating fin (22) penetrates through the outer wall of the air outlet (3) and is fixed on the surface of the inner wall of the air outlet (3).
5. The Roots vacuum pump according to claim 4, wherein a ventilation pipeline (23) is arranged in the housing (1), a fan (24) is fixedly connected to the housing (1), and an air outlet of the fan (24) is connected with the ventilation pipeline (23).
6. A Roots vacuum pump according to claim 5, wherein the air inlet (25) of the ventilation duct (23) is connected to an air inlet branch (26), the air inlet branch (26) is connected to an annular ventilation duct (27), the annular ventilation duct (27) of the ventilation duct (23) is connected to a plurality of first air outlets (28), the annular ventilation duct (27) is connected to a plurality of second air outlets (29), and the locations of the first air outlets (28) and the second air outlets (29) connected to the annular ventilation duct (27) are the same.
7. A roots vacuum pump according to claim 6, characterized in that the first air outlet (28) and the second air outlet (29) are located between two adjacent heat radiating fins (22), and the number of the first air outlet (28), the number of the second air outlet (29) and the number of the heat radiating fins (22) are the same.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775713.5A CN113309701B (en) | 2021-07-09 | 2021-07-09 | Roots vacuum pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775713.5A CN113309701B (en) | 2021-07-09 | 2021-07-09 | Roots vacuum pump |
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| CN113309701A CN113309701A (en) | 2021-08-27 |
| CN113309701B true CN113309701B (en) | 2023-12-26 |
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| CN202110775713.5A Active CN113309701B (en) | 2021-07-09 | 2021-07-09 | Roots vacuum pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2625582A (en) * | 2022-12-21 | 2024-06-26 | Leybold Gmbh | Vacuum pump |
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| CN113309701A (en) | 2021-08-27 |
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