CN118564457B - Small liquid-cooled vacuum pump - Google Patents
Small liquid-cooled vacuum pump Download PDFInfo
- Publication number
- CN118564457B CN118564457B CN202411037890.3A CN202411037890A CN118564457B CN 118564457 B CN118564457 B CN 118564457B CN 202411037890 A CN202411037890 A CN 202411037890A CN 118564457 B CN118564457 B CN 118564457B
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- Prior art keywords
- rotating shaft
- liquid
- hollow rotating
- inlet pipe
- liquid inlet
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- 239000007788 liquid Substances 0.000 claims abstract description 112
- 239000000110 cooling liquid Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000012224 working solution Substances 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
-
- 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
- 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
- F04C2240/60—Shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to the technical field of pumps, in particular to a small liquid-cooled vacuum pump, which comprises a stator mould shell and a servo motor, wherein a working cavity, a liquid inlet, a liquid outlet, an eccentric impeller, a hollow rotating shaft and a cooling unit are arranged on the stator mould shell; the two ends of the liquid inlet pipe extend to the outside of the storage cylinder, one end of the liquid inlet pipe is coaxially inserted in the hollow rotating shaft, one end of the liquid inlet pipe positioned outside the hollow rotating shaft is connected with the bottom end of the liquid outlet pipe through the connecting pipe, the invention conveys cooling liquid into the hollow rotating shaft through the liquid inlet pipe, and the heat generated by the rotating hollow rotating shaft is absorbed by the cooling liquid through the clearance between the inner wall of the hollow rotating shaft and the outer wall of the liquid inlet pipe, so that the abrasion rate is prevented from being influenced by the temperature rise of the hollow rotating shaft.
Description
Technical Field
The invention relates to the technical field of pumps, in particular to a small liquid-cooled vacuum pump.
Background
An eccentric rotor with fixed blades is arranged in the water ring vacuum pump, working liquid is thrown to the wall of the stator, the working liquid forms a liquid ring concentric with the stator, and the liquid ring and the eccentric rotor blades together form a rotary variable-volume vacuum pump with variable volume. The heat that produces in the water ring vacuum pump operation process mainly comes from the inside pivot of pump body, the working solution can take away stator department heat in the flow in-process, but the pivot department temperature with motor body coupling still keeps higher state, the pivot continuously rotates the in-process heat that friction produced and constantly transmits to whole pump body department, cause pivot department temperature to rise, thereby cause the inside temperature of whole water ring vacuum pump too high, the pivot wear rate of temperature rise state improves, even cause the deformation of pivot, thereby the fault rate of water ring vacuum pump has been improved, above-mentioned water ring vacuum pump cooling auxiliary device's structure is too complicated, need external device to carry out auxiliary cooling, equipment cost and volume have certainly increased, water ring vacuum pump self cooling effect remains further improvement.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a compact liquid-cooled vacuum pump that addresses the problems of the prior art.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
The small liquid-cooled vacuum pump comprises a stator mould shell and a servo motor, wherein a working cavity is arranged in the stator mould shell, the working cavity is connected with a liquid inlet and a liquid outlet, an eccentric impeller is rotatably arranged in the working cavity, a hollow rotating shaft is coaxially arranged on the eccentric impeller, a cooling unit is arranged outside the stator mould shell, the hollow rotating shaft extends to the outside of the stator mould shell, a working end of the servo motor is in transmission connection with one end of the hollow rotating shaft, which is positioned outside the stator mould shell, the cooling unit comprises a storage cylinder and a liquid inlet pipe, quantitative cooling liquid is stored in the storage cylinder, the bottom of the storage cylinder is provided with the liquid outlet pipe, and spiral blades are rotatably arranged in the liquid outlet pipe; two ends of the liquid inlet pipe extend to the outside of the storage cylinder, one end of the liquid inlet pipe is coaxially inserted into the hollow rotating shaft, and one end of the liquid inlet pipe positioned outside the hollow rotating shaft is connected with the bottom end of the liquid outlet pipe through a connecting pipe; the inner chamber of hollow pivot is kept away from the one end of cooling unit and is set up to circular arc inner wall end, and the feed liquor pipe is located and exists the clearance between the inside one end of hollow pivot and circular arc inner wall end, and the cooling liquid in the spiral blade transport storage section of thick bamboo gets into in the hollow pivot through connecting pipe and feed liquor pipe to in the clearance backward flow to the storage section of thick bamboo through hollow pivot inner wall and feed liquor pipe outer wall.
Preferably, one end of the hollow rotating shaft, which is positioned outside the stator mould shell, is coaxially provided with a fixed shaft ring, the fixed shaft ring extends into the storage cylinder, the liquid inlet pipe is inserted into the fixed shaft ring, and the inner wall of the fixed shaft ring is attached to the outer wall of the liquid inlet pipe; the fixed shaft ring is provided with a plurality of liquid passing ports, the liquid passing ports penetrate through the fixed shaft ring along the axis direction of the fixed shaft ring, and the liquid passing ports are distributed around the axis of the fixed shaft ring at equal angles.
Preferably, the spiral blade is spirally arranged on a rotating shaft, the axis of the rotating shaft and the axis of the liquid outlet pipe are positioned on the same straight line, and the rotating shaft is rotatably arranged on a fixing frame arranged in the storage cylinder; the storage barrel is internally provided with a first bevel gear and a second bevel gear, the first bevel gear is coaxially arranged at the top end of the rotating shaft, the second bevel gear is coaxially arranged outside the fixed shaft collar, and the first bevel gear is meshed with the second bevel gear.
Preferably, the liquid inlet pipe is provided with a contraction section, a throat pipe and an expansion section towards one end of the circular arc inner wall end of the hollow rotating shaft, the contraction section, the throat pipe and the expansion section form a venturi pipe structure, and the expansion section is positioned at one end of the liquid inlet pipe towards the circular arc inner wall end.
Preferably, a material adding port is formed in the top of the storage cylinder, and a plugging plug for plugging the material adding port is arranged on the material adding port.
Preferably, the inner wall of the hollow rotating shaft is provided with a plurality of inner protruding blocks, the inner protruding blocks are distributed around the axis of the end head of the circular arc inner wall and are arranged along the axis direction of the hollow rotating shaft, the inner protruding blocks are rotatably arranged on one side of the inner protruding blocks, which faces the axis of the hollow rotating shaft, and the balls are attached to the outer wall of the liquid inlet pipe.
Preferably, a sealing bearing is arranged at the connection position of the hollow rotating shaft and the stator mould shell.
Preferably, the rotation shaft of the servo motor is parallel to the axis of the hollow rotation shaft, a first transmission gear is coaxially arranged at the working end of the servo motor, a second transmission toothed ring is coaxially arranged at one end of the hollow rotation shaft, which is positioned outside the stator mould shell, the first transmission gear is in transmission connection with the second transmission toothed ring through a transmission belt, a protective cover is fixedly arranged outside the stator mould shell, and the first transmission gear, the second transmission toothed ring and the transmission belt are all positioned in the protective cover.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the cooling unit in the invention cools the hollow rotating shaft, the hollow rotating shaft is internally provided with a cavity, the liquid inlet pipe of the cooling unit is inserted into the hollow rotating shaft, the liquid inlet pipe conveys cooling liquid into the hollow rotating shaft and reversely flows after contacting with the end head of the circular arc inner wall of the hollow rotating shaft, the cooling liquid emitted by the liquid inlet pipe is uniformly scattered in all directions on the periphery of the inner wall of the hollow rotating shaft, the cooling liquid flows back through the gap between the inner wall of the hollow rotating shaft and the outer wall of the liquid inlet pipe, and in the process, the cooling liquid absorbs heat generated by the rotating hollow rotating shaft, so that the temperature inside the vacuum pump is not overhigh, and the influence on the abrasion rate caused by the temperature rise of the hollow rotating shaft is avoided.
Secondly, when the spiral blades in the storage cylinder rotate, the cooling liquid in the storage cylinder can be conveyed into the liquid inlet pipe through the liquid outlet pipe and the connecting pipe, the spiral blades are arranged on the periphery of the rotating shaft, the rotating shaft is connected with the hollow rotating shaft through the fixing frame and the second bevel gear in a transmission mode, and when the vacuum pump is started, the cooling liquid in the storage cylinder is automatically injected into the hollow rotating shaft for cooling, independent starting is not needed, and the temperature in continuous operation of the vacuum pump is kept.
Thirdly, the inner wall of the hollow rotating shaft is provided with a plurality of inner convex blocks, the balls on the inner convex blocks are in contact with the outer wall of the liquid inlet pipe, the hollow rotating shaft is supported from inside to outside, deformation of the hollow rotating shaft is prevented under the condition of external heat and internal cooling, when the hollow rotating shaft rotates, the contact area of the balls and the outer wall of the liquid inlet pipe is small, the heat generated by friction with the outer wall of the liquid inlet pipe is small, and the hollow rotating shaft can be absorbed by cooling liquid in time.
Drawings
FIG. 1 is a perspective view of a small liquid-cooled vacuum pump;
FIG. 2 is a side view of a small liquid-cooled vacuum pump;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion at B of FIG. 3;
FIG. 5 is a front view of a miniature liquid-cooled vacuum pump;
FIG. 6 is a cross-sectional view taken at C-C of FIG. 5;
FIG. 7 is a partial enlarged view at D of FIG. 6;
FIG. 8 is a cross-sectional view of the interface at E-E of FIG. 5;
FIG. 9 is an exploded view of a three-dimensional structure of a small liquid-cooled vacuum pump;
Fig. 10 is a perspective exploded view of a small liquid-cooled vacuum pump.
The reference numerals in the figures are: 1. a stator mold shell; 11. a working chamber; 12. a liquid inlet; 13. a liquid outlet; 14. an eccentric impeller; 2. a servo motor; 21. a first transmission gear; 22. a second drive ring gear; 23. a transmission belt; 24. a protective cover; 3. a hollow rotating shaft; 31. an arc inner wall end; 32. setting a collar; 321. a liquid passing port; 33. an inner bump; 331. a ball; 34. sealing the bearing; 4. a cooling unit; 41. a storage cylinder; 411. a liquid outlet pipe; 412. a helical blade; 413. a rotating shaft; 414. a first bevel gear; 415. a fixing frame; 416. a second bevel gear; 417. a material adding port; 418. sealing the plug; 42. a liquid inlet pipe; 421. a connecting pipe; 422. a constriction section; 423. a throat; 424. and (5) expanding the segment.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Referring to fig. 1 to 10:
The utility model provides a small-size liquid-cooled vacuum pump, including stator mould shell 1 and servo motor 2, be provided with working chamber 11 in the stator mould shell 1, working chamber 11 connects inlet 12 and liquid outlet 13, eccentric impeller 14 is installed to the internal rotation of working chamber 11, hollow pivot 3 is installed to eccentric impeller 14 coaxial, the outside of stator mould shell 1 is provided with cooling unit 4, hollow pivot 3 extends to the outside of stator mould shell 1, the work end transmission of servo motor 2 connects hollow pivot 3 to be located the outside one end of stator mould shell 1, cooling unit 4 includes storage cylinder 41 and feed liquor pipe 42, there is quantitative coolant liquid in storage cylinder 41, the bottom of storage cylinder 41 is provided with drain pipe 411, spiral vane 412 is installed to the internal rotation of drain pipe 411; two ends of the liquid inlet pipe 42 extend to the outside of the storage cylinder 41, one end of the liquid inlet pipe 42 is coaxially inserted into the hollow rotating shaft 3, and one end of the liquid inlet pipe 42 positioned outside the hollow rotating shaft 3 is connected with the bottom end of the liquid outlet pipe 411 through a connecting pipe 421; the inner chamber of hollow pivot 3 is kept away from the one end of cooling unit 4 and is set up to circular arc inner wall end 31, and there is the clearance between the inner end of hollow pivot 3 inside and circular arc inner wall end 31 in the feed liquor pipe 42, and the cooling liquid in the spiral blade 412 conveying storage section of thick bamboo 41 passes through connecting pipe 421 and feed liquor pipe 42 and gets into in the hollow pivot 3 to in the clearance through hollow pivot 3 inner wall and feed liquor pipe 42 outer wall flows back to storage section of thick bamboo 41.
The vacuum pump comprises a stator mould shell 1, a working cavity 11, a liquid inlet 12, a liquid outlet 13 and an eccentric impeller 14, wherein the eccentric impeller 14 is eccentrically arranged in the working cavity 11, when a servo motor 2 drives a hollow rotating shaft 3 to rotate, the hollow rotating shaft 3 drives the eccentric impeller 14 to rotate so as to enable the vacuum pump to operate, in order to prevent the hollow rotating shaft 3 from heating in the working process, the embodiment is provided with a cooling unit 4 for cooling the hollow rotating shaft 3, a cavity is arranged in the hollow rotating shaft 3, a liquid inlet pipe 42 of the cooling unit 4 is inserted into the hollow rotating shaft 3, a gap exists between the top end of the liquid inlet pipe 42 and an arc inner wall end 31 of the hollow rotating shaft 3, when a spiral blade 412 in a storage cylinder 41 rotates, cooling liquid in the storage cylinder 41 can be conveyed into the liquid inlet pipe 42 through the liquid outlet pipe 411 and a connecting pipe 421, the liquid inlet pipe 42 conveys the cooling liquid into the hollow rotating shaft 3 and reversely flows after contacting the arc inner wall end 31 of the hollow rotating shaft 3, the existence of the circular arc inner wall end head 31 makes the cooling liquid emitted by the liquid inlet pipe 42 scatter uniformly to all directions on the inner wall circumference of the hollow rotating shaft 3, the cooling liquid flows back through the gap between the inner wall of the hollow rotating shaft 3 and the outer wall of the liquid inlet pipe 42 until flowing to one end of the hollow rotating shaft 3 inserted into the storage cylinder 41, and enters the storage cylinder 41, in the process, the cooling liquid absorbs the heat generated by the rotating hollow rotating shaft 3, the temperature inside the vacuum pump is not too high, the temperature rise of the hollow rotating shaft 3 is prevented from influencing the abrasion rate, the spiral blade 412 enables the cooling liquid to circulate, the resource is saved, the connecting pipe 421 positioned outside the storage cylinder 41 can cooperate with other heat exchange devices to cool the cooling liquid entering the connecting pipe 421, so that the cooling liquid always keeps lower temperature and circulates in the liquid inlet pipe 42 and the hollow rotating shaft 3, the cooling effect is maintained.
In order to solve the problem of how to ensure that the axial position of the liquid inlet pipe 42 in the hollow rotating shaft 3 is stable and that the cooling liquid in the hollow rotating shaft 3 can enter the storage cylinder 41, the following features are specifically provided:
One end of the hollow rotating shaft 3 positioned outside the stator mould shell 1 is coaxially provided with a fixed shaft ring 32, the fixed shaft ring 32 extends into the storage cylinder 41, a liquid inlet pipe 42 is inserted into the fixed shaft ring 32, and the inner wall of the fixed shaft ring 32 is attached to the outer wall of the liquid inlet pipe 42; the fixed collar 32 is provided with a plurality of liquid passing ports 321, the liquid passing ports 321 penetrate through the fixed collar 32 along the axial direction of the fixed collar 32, and the liquid passing ports 321 are distributed around the axial line of the fixed collar 32 at equal angles.
In this embodiment, the fixed collar 32 installed at one end of the hollow rotating shaft 3 is inserted into the storage cylinder 41, the liquid inlet pipe 42 passes through the fixed collar 32 to enter the hollow rotating shaft 3, when the cooling liquid ejected from the liquid inlet pipe 42 flows to one end of the fixed collar 32, the cooling liquid can be ejected through the liquid passing port 321 on the fixed collar 32 and enter the storage cylinder 41, and the liquid passing port 321 surrounds the axis of the fixed collar 32 to ensure that the cooling liquid in the hollow rotating shaft 3 cannot be influenced to flow into the storage cylinder 41 when the hollow rotating shaft 3 is in a rotating state.
In order to solve the problem of how to automatically cool the hollow rotating shaft 3 when the vacuum pump works, the following characteristics are specifically set:
The spiral blade 412 is spirally arranged on the rotating shaft 413, the axis of the rotating shaft 413 and the axis of the liquid outlet pipe 411 are in the same straight line, and the rotating shaft 413 is rotatably arranged on a fixed frame 415 arranged in the storage cylinder 41; a first bevel gear 414 and a second bevel gear 416 are arranged in the storage barrel 41, the first bevel gear 414 is coaxially arranged at the top end of the rotating shaft 413, the second bevel gear 416 is coaxially arranged outside the fixed collar 32, and the first bevel gear 414 is in meshed connection with the second bevel gear 416 by the fixing frame 415.
The spiral vane 412 in this embodiment is spirally disposed outside the rotating shaft 413, the rotating shaft 413 fixes its own axis position through the fixing frame 415 in the cooling unit 4, the first bevel gear 414 at the top of the rotating shaft 413 is meshed with the second bevel gear 416 coaxially installed outside the fixed collar 32, so when the vacuum pump is started, the servo motor 2 drives the hollow rotating shaft 3 to rotate, the fixed collar 32 of the hollow rotating shaft 3 drives the second bevel gear 416 to synchronously rotate, the second bevel gear 416 rotates to drive the first bevel gear 414 to rotate, the first bevel gear 414 drives the rotating shaft 413 to rotate, the rotating shaft 413 rotates to enable the spiral vane 412 to rotate, the cooling liquid in the storage cylinder 41 is conveyed into the liquid outlet pipe 411, and is injected into the connecting pipe 421 and the liquid inlet pipe 42, and finally enters the hollow rotating shaft 3 to cool the hollow rotating shaft 3, the rotating shaft 413 in this embodiment is connected with the hollow rotating shaft 3 through the first bevel gear 414 and the second bevel gear 416 in a transmission mode, the cooling liquid in the storage cylinder 41 is automatically injected into the hollow rotating shaft 3 to cool without separate starting when the vacuum pump is started, and the temperature in the continuous operation of the vacuum pump is maintained.
In order to increase the flow rate of the cooling liquid into the hollow rotating shaft 3, the following features are specifically provided:
The liquid inlet pipe 42 is provided with a contraction section 422, a throat 423 and an expansion section 424 towards one end of the circular arc inner wall end 31 of the hollow rotating shaft 3, the contraction section 422, the throat 423 and the expansion section 424 form a venturi tube structure, and the expansion section 424 is positioned at one end of the liquid inlet pipe 42 towards the circular arc inner wall end 31.
In this embodiment, the liquid inlet pipe 42 forms a venturi structure towards one end of the hollow rotating shaft 3 through the contraction section 422, the throat 423 and the expansion section 424, the cooling liquid entering the contraction section 422 is compressed, and the flow speed is accelerated when entering the expansion section 424 after passing through the throat 423, so that the cooling liquid can contact the circular arc inner wall end 31 of the hollow rotating shaft 3 at a faster flow speed, the faster the cooling liquid contacts the circular arc inner wall end 31, the faster the upward reflection speed, the more dispersed the cooling liquid, the more comprehensive contact with the inner wall of the hollow rotating shaft 3, the heat absorption effect is improved, and the situation that the cooling liquid cannot comprehensively contact the inner wall of the hollow rotating shaft 3 due to slow cooling liquid flow is avoided.
In order to solve the problem of how to add the coolant in the reservoir tube 41, the following features are specifically provided:
The top of the storage cylinder 41 is provided with a feed port 417, and the feed port 417 is provided with a plug 418 for plugging the feed port 417.
The top of the storage cylinder 41 in this embodiment is provided with a material adding port 417, a worker can take off a plugging plug 418 on the material adding port 417 before the vacuum pump starts to work, and a proper amount of cooling liquid is added into the storage cylinder 41 through the material adding port 417, so that the cooling liquid can be conveyed when the liquid outlet pipe 411 is completely covered by the cooling liquid, and the spiral blade 412 is ensured to rotate.
In order to prevent the hollow rotating shaft 3 from deformation under the condition of external heat and internal cooling, the following characteristics are specifically provided:
the inner wall of the hollow rotating shaft 3 is provided with a plurality of inner protruding blocks 33, the inner protruding blocks 33 are distributed around the axis of the circular arc inner wall end head 31 and are arranged along the axis direction of the hollow rotating shaft 3, the inner protruding blocks 33 are rotatably provided with balls 331 towards one side of the axis of the hollow rotating shaft 3, and the balls 331 are attached to the outer wall of the liquid inlet pipe 42.
The inner wall of the hollow rotating shaft 3 in this embodiment is provided with a plurality of inner protruding blocks 33, the balls 331 on the inner protruding blocks 33 are in contact with the outer wall of the liquid inlet pipe 42, the hollow rotating shaft 3 is also supported from inside to outside by positioning the liquid inlet pipe 42 through a plurality of balls 331, the hollow rotating shaft 3 is prevented from being deformed under the condition of external heat and internal cooling, when the hollow rotating shaft 3 rotates, the contact area between the balls 331 and the outer wall of the liquid inlet pipe 42 is small, the heat generated by friction with the outer wall of the liquid inlet pipe 42 is small, the balls 331 can be absorbed by cooling liquid in time, the inner protruding blocks 33 and the balls 331 are distributed around the axis of the circular arc inner wall end 31 and are arranged along the axis direction of the hollow rotating shaft 3, and the cooling liquid can flow through the space between the inner protruding blocks 33 and cannot influence the flow of the cooling liquid in the hollow rotating shaft 3.
In order to achieve the purpose that the servo motor 2 can drive the hollow rotating shaft 3 to rotate so as to drive the eccentric impeller 14 and the second bevel gear 416 in the storage cylinder 41 to synchronously rotate, the following characteristics are specifically provided:
a sealing bearing 34 is arranged at the connection position of the hollow rotating shaft 3 and the stator mould shell 1.
The rotation axis of the servo motor 2 is parallel to the axis of the hollow rotating shaft 3, a first transmission gear 21 is coaxially arranged on the working end of the servo motor 2, a second transmission gear ring 22 is coaxially arranged at one end of the hollow rotating shaft 3, which is positioned outside the stator mould shell 1, the first transmission gear 21 is in transmission connection with the second transmission gear ring 22 through a transmission belt 23, a protective cover 24 is fixedly arranged outside the stator mould shell 1, and the first transmission gear 21, the second transmission gear ring 22 and the transmission belt 23 are all positioned in the protective cover 24.
The hollow rotating shaft 3 in this embodiment is located at one end of the outer part of the servo motor 2 and is coaxially connected with the second transmission toothed ring 22, in this embodiment, the servo motor 2 is located at one side of the stator mould shell 1 and the hollow rotating shaft 3, the rotating shaft of the servo motor 2 is parallel to the axis of the hollow rotating shaft 3, the first transmission gear 21 on the working end of the servo motor 2 is in transmission connection with the second transmission toothed ring 22 through the transmission belt 23, so that the servo motor 2 can drive the second transmission toothed ring 22 on the hollow rotating shaft 3 to rotate, synchronous rotation of the hollow rotating shaft 3, the liquid outlet 13 and the second bevel gear 416 is realized, the first transmission gear 21, the second transmission toothed ring 22 and the transmission belt 23 are all located in the protective cover 24, and the protective cover 24 protects the first transmission gear 21, the second transmission toothed ring 22 and the transmission belt 23, and prevents dust from entering to affect the transmission efficiency.
Working principle: the vacuum pump comprises a stator mould shell 1, a working cavity 11, a liquid inlet 12, a liquid outlet 13 and an eccentric impeller 14, wherein the eccentric impeller 14 is eccentrically arranged in the working cavity 11, when a servo motor 2 drives a hollow rotating shaft 3 to rotate, the hollow rotating shaft 3 drives the eccentric impeller 14 to rotate so as to enable the vacuum pump to operate, a cooling unit 4 cools the hollow rotating shaft 3, a cavity is formed in the hollow rotating shaft 3, a liquid inlet pipe 42 of the cooling unit 4 is inserted into the hollow rotating shaft 3, a gap exists between the top end of the liquid inlet pipe 42 and an arc inner wall end 31 of the hollow rotating shaft 3, when a spiral blade 412 in a storage cylinder 41 rotates, cooling liquid in the storage cylinder 41 can be conveyed into the liquid inlet pipe 42 through the liquid outlet pipe 411 and a connecting pipe 421, the liquid inlet pipe 42 conveys the cooling liquid into the hollow rotating shaft 3 and reversely flows after contacting the arc inner wall end 31 of the hollow rotating shaft 3, the cooling liquid ejected by the liquid inlet pipe 42 is uniformly scattered in all directions on the periphery of the inner wall of the hollow rotating shaft 3, the cooling liquid flows back through the gap between the inner wall of the hollow rotating shaft 3 and the outer wall of the liquid inlet pipe 42 until the cooling liquid flows to one end of the hollow rotating shaft 3, and enters the storage cylinder 41 to cool the hollow rotating shaft 3.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The utility model provides a small-size liquid-cooled vacuum pump, including stator mould shell (1) and servo motor (2), be provided with working chamber (11) in stator mould shell (1), working chamber (11) are connected inlet (12) and liquid outlet (13), eccentric impeller (14) are installed in working chamber (11) internal rotation, hollow pivot (3) are installed to eccentric impeller (14) coaxial, stator mould shell (1) outside is provided with cooling unit (4), a serial communication port, hollow pivot (3) extend to stator mould shell (1) outside, the one end outside hollow pivot (3) are located in stator mould shell (1) is connected in the work end transmission of servo motor (2), cooling unit (4) are including storage cylinder (41) and feed liquor pipe (42), there is quantitative coolant liquid in storage cylinder (41), storage cylinder (41) bottom is provided with out liquid pipe (411), liquid pipe (411) internal rotation installs helical blade (412);
Two ends of the liquid inlet pipe (42) extend to the outside of the storage cylinder (41), one end of the liquid inlet pipe (42) is coaxially inserted into the hollow rotating shaft (3), and one end of the liquid inlet pipe (42) positioned at the outside of the hollow rotating shaft (3) is connected with the bottom end of the liquid outlet pipe (411) through a connecting pipe (421);
One end of the inner cavity of the hollow rotating shaft (3) far away from the cooling unit (4) is provided with an arc inner wall end (31), a gap exists between one end of the liquid inlet pipe (42) positioned inside the hollow rotating shaft (3) and the arc inner wall end (31), cooling liquid in the spiral blade (412) conveying storage cylinder (41) enters the hollow rotating shaft (3) through the connecting pipe (421) and the liquid inlet pipe (42), and flows back into the storage cylinder (41) through the gap between the inner wall of the hollow rotating shaft (3) and the outer wall of the liquid inlet pipe (42);
One end of the hollow rotating shaft (3) positioned outside the stator mould shell (1) is coaxially provided with a fixed shaft ring (32), the fixed shaft ring (32) extends into the storage cylinder (41), a liquid inlet pipe (42) is inserted into the fixed shaft ring (32), and the inner wall of the fixed shaft ring (32) is attached to the outer wall of the liquid inlet pipe (42);
the fixed collar (32) is provided with a plurality of liquid passing ports (321), the liquid passing ports (321) penetrate through the fixed collar (32) along the axial direction of the fixed collar (32), and the liquid passing ports (321) are distributed around the axial line of the fixed collar (32) at equal angles;
The spiral blades (412) are spirally arranged on the rotating shaft (413), the axis of the rotating shaft (413) and the axis of the liquid outlet pipe (411) are in the same straight line, and the rotating shaft (413) is rotatably arranged on a fixing frame (415) arranged in the storage cylinder (41);
A first bevel gear (414) and a second bevel gear (416) are arranged in the storage barrel (41), the first bevel gear (414) is coaxially arranged at the top end of the rotating shaft (413), the second bevel gear (416) is coaxially arranged outside the fixed shaft ring (32), and the first bevel gear (414) is in meshed connection with the second bevel gear (416);
The liquid inlet pipe (42) is provided with a contraction section (422), a throat pipe (423) and an expansion section (424) towards one end of the circular arc inner wall end (31) of the hollow rotating shaft (3), the contraction section (422), the throat pipe (423) and the expansion section (424) form a venturi structure, and the expansion section (424) is located at one end of the liquid inlet pipe (42) towards the circular arc inner wall end (31).
2. The small liquid-cooled vacuum pump as claimed in claim 1, wherein a material adding port (417) is provided at the top of the storage cylinder (41), and a plugging plug (418) for plugging the material adding port (417) is provided on the material adding port (417).
3. The small liquid-cooled vacuum pump as claimed in claim 1, wherein a plurality of inner protrusions (33) are provided on the inner wall of the hollow rotating shaft (3), the inner protrusions (33) are distributed around the axis of the circular arc inner wall end (31) and are arranged along the axis direction of the hollow rotating shaft (3), the inner protrusions (33) are rotatably provided with balls (331) on one side of the inner protrusions (33) facing the axis of the hollow rotating shaft (3), and the balls (331) are attached to the outer wall of the liquid inlet pipe (42).
4. A small liquid-cooled vacuum pump according to claim 1, characterized in that the hollow shaft (3) is provided with a sealing bearing (34) in the connection with the stator mould shell (1).
5. A small liquid-cooled vacuum pump according to claim 1, characterized in that the rotation axis of the servo motor (2) is parallel to the axis of the hollow rotation shaft (3), a first transmission gear (21) is coaxially arranged on the working end of the servo motor (2), a second transmission gear ring (22) is coaxially arranged at one end of the hollow rotation shaft (3) positioned outside the stator mould shell (1), the first transmission gear (21) is in transmission connection with the second transmission gear ring (22) through a transmission belt (23), a protective cover (24) is fixedly arranged outside the stator mould shell (1), and the first transmission gear (21), the second transmission gear ring (22) and the transmission belt (23) are all positioned in the protective cover (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411037890.3A CN118564457B (en) | 2024-07-31 | 2024-07-31 | Small liquid-cooled vacuum pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411037890.3A CN118564457B (en) | 2024-07-31 | 2024-07-31 | Small liquid-cooled vacuum pump |
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| Publication Number | Publication Date |
|---|---|
| CN118564457A CN118564457A (en) | 2024-08-30 |
| CN118564457B true CN118564457B (en) | 2024-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411037890.3A Active CN118564457B (en) | 2024-07-31 | 2024-07-31 | Small liquid-cooled vacuum pump |
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| Country | Link |
|---|---|
| CN (1) | CN118564457B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW430722B (en) * | 1997-10-10 | 2001-04-21 | Leybold Vakuum Gmbh | Cooled screw-vacuum-pump |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19745615A1 (en) * | 1997-10-10 | 1999-04-15 | Leybold Vakuum Gmbh | Screw vacuum pump with rotors |
| DE19963171A1 (en) * | 1999-12-27 | 2001-06-28 | Leybold Vakuum Gmbh | Screw-type vacuum pump used in cooling circuits has guide components located in open bores in shafts serving for separate guiding of inflowing and outflowing cooling medium |
| CN106762668B (en) * | 2017-03-07 | 2018-06-22 | 北京艾岗科技有限公司 | A kind of vertical type vacuum pump self-circulation lubricating cooling system |
| CN219197630U (en) * | 2022-09-01 | 2023-06-16 | 杭州蓝天真空设备制造有限公司 | A kind of water ring vacuum pump with cooling device |
| CN117514810B (en) * | 2023-12-11 | 2024-10-11 | 淄博水环真空泵厂有限公司 | Working fluid cooling mechanism of water ring vacuum pump |
-
2024
- 2024-07-31 CN CN202411037890.3A patent/CN118564457B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW430722B (en) * | 1997-10-10 | 2001-04-21 | Leybold Vakuum Gmbh | Cooled screw-vacuum-pump |
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| CN118564457A (en) | 2024-08-30 |
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