CN114876795B - Energy-saving backflow-preventing variable-pitch screw vacuum pump - Google Patents
Energy-saving backflow-preventing variable-pitch screw vacuum pump Download PDFInfo
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- CN114876795B CN114876795B CN202210440051.0A CN202210440051A CN114876795B CN 114876795 B CN114876795 B CN 114876795B CN 202210440051 A CN202210440051 A CN 202210440051A CN 114876795 B CN114876795 B CN 114876795B
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- 238000007906 compression Methods 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 22
- 230000000151 anti-reflux effect Effects 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material 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
- 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
- F04C18/16—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 with helical teeth, e.g. chevron-shaped, screw type
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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
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
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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
- 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
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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
- 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
- F04C29/0021—Systems for the equilibration of forces acting on the pump
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
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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
- F04C2240/00—Components
- F04C2240/20—Rotors
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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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses an energy-saving anti-backflow variable pitch screw vacuum pump, and relates to the technical field of vacuum pumps. The anti-backflow device comprises a pump body, an anti-backflow component and a force application component, wherein a partition plate is arranged at one end in the pump body and divides the pump body into a driving chamber and a compression chamber, two mutually meshed screws are arranged in the compression chamber, gears are fixed at one end of each screw, which is positioned in the driving chamber, the two gears are meshed, an air inlet end and an air outlet end are arranged on the compression chamber, and the anti-backflow component comprises a pipe body and a sliding rod. According to the invention, the force application assembly is designed, the screw rod reverse rotation condition is avoided through the ratchet mechanism, the arc-shaped spring is arranged between the outer gear ring and the shaft body, so that the outer gear ring has certain pre-provided reverse elastic force, the elastic force is pre-applied to the screw rod through the outer gear ring and the gear, and when the reflux trend occurs in the pump body, the elastic force applied by the force application assembly can be used for counteracting the reverse driving force generated by the screw rod, the air extraction efficiency of a product can be improved, and the energy saving effect is achieved.
Description
Technical Field
The invention belongs to the technical field of vacuum pumps, and particularly relates to an energy-saving anti-backflow variable-pitch screw vacuum pump.
Background
The variable pitch screw vacuum pump has the characteristics of high vacuum, stable air extraction performance, oil-free and clean pump cavity, simple and compact structure, no friction, no waste gas, no waste liquid discharge and the like, and is a most ideal vacuumizing device in the field of the prior mechanical vacuum pump, and has been widely accepted and used in various industries.
In recent years, along with the needs of a plurality of new processes, the variable pitch screw vacuum pump with a traditional structure can not well meet the needs of the new processes, and mainly has the defects of low air extraction efficiency, high exhaust air temperature, high power consumption and the like.
In the use of the vacuum pump, the pressure in the pump body can be increased along with the compression of the gas, the increased pressure can give the reflux trend of the gas in the pump body, the reflux trend can generate reverse thrust to the screw rod, the thrust received by the screw rod is counteracted by the torsion provided by the motor, so that the power requirement of the motor is higher, the energy consumption is larger, and meanwhile, the reflux trend can generate reverse thrust to the air inlet end of the pump body, thereby influencing the air extraction efficiency and further causing the problem of larger energy consumption.
Disclosure of Invention
The invention aims to provide an energy-saving anti-backflow variable pitch screw vacuum pump, which is characterized in that a force application component is designed, the screw reverse rotation condition is avoided through a ratchet mechanism, an arc spring is arranged between an outer gear ring and a shaft body, so that the outer gear ring has certain pre-provided reverse elastic force, the elastic force is pre-applied to the screw through the outer gear ring and the gear, and when the backflow trend occurs in a pump body, the elastic force applied by the force application component can be used for counteracting the reverse driving force generated by the screw, the air extraction efficiency of a product can be improved, and the energy-saving effect is achieved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
The invention relates to an energy-saving anti-backflow variable pitch screw vacuum pump, which comprises a pump body, an anti-backflow component and a force application component, wherein a partition plate is arranged at one end in the pump body, the partition plate divides the pump body into a driving chamber and a compression chamber, two mutually meshed screws are arranged in the compression chamber, a gear is fixed at one end of each screw in the driving chamber, the two gears are meshed, and an air inlet end and an air exhaust end are arranged on the compression chamber;
The backflow prevention assembly comprises a pipe body and a sliding rod;
the pipe body is fixed in the air inlet end through a flange, the other end of the pipe body is fixed with an end pipe through a conical pipe, and a supporting plate is fixed at one end, close to the conical pipe, in the pipe body;
the sliding rod is arranged on the supporting plate in a sliding way, a bottom plate is fixed at one end, close to the end pipe, of the sliding rod, a sealing bag which is arranged opposite to the end pipe is fixed on the top surface of the bottom plate, an upper cover plate is connected with the other end of the sliding rod in a threaded way, and a straight spring is arranged between the upper cover plate and the supporting plate;
The force application assembly comprises a shaft body and an outer gear ring;
One end of the shaft body is fixed in the driving chamber through a ratchet mechanism, a plurality of support plates are fixed at the other end of the shaft body, annular rods are fixedly penetrated on the support plates, and a plurality of arc-shaped openings are formed among the support plates;
the outer gear ring is characterized in that a plurality of pushing plates are fixed on the inner wall of the outer gear ring, the pushing plates are respectively arranged in a plurality of arc-shaped openings and slide along the annular rods, one side of each pushing plate is movably connected with a support plate on one side of each arc-shaped opening, and an arc-shaped spring is fixed between the other side of each pushing plate and the support plate on the other side of each arc-shaped opening;
The outer gear ring is positioned on one side of a gear on a screw rod and meshed with the gear.
Further, the screw is a variable pitch screw, and the screw comprises an air inlet section, a compression section and an air exhaust section.
Further, the air inlet section is a large-pitch spiral part with equal pitch, and the spiral part of the air inlet section is arranged to be 2-3 circles.
Further, the screw pitch of the compression section is sequentially reduced from the air inlet section to the air outlet section, and the screw part of the compression section is arranged to be 3-5 circles.
Further, the exhaust section is a small-pitch spiral part with equal pitch, and the spiral part of the exhaust section is arranged to be 2-3 circles.
Further, a jacket is arranged on the side wall of the pump body, and circulating cooling water is arranged in the jacket.
Further, both ends of the pump body are open ends, a driving motor is fixed at one end of the pump body, which is close to the driving chamber, and the output end of the driving motor is fixed with the end part of the screw rod, which is far away from the force application component.
Further, a sealing cover is fixed at the other end of the pump body, and the two screw rod ends are fixed with the sealing cover through bearings.
Further, a high-temperature-resistant sealing piece is arranged at the joint of the screw and the partition plate, an oil pipe is arranged on the circumferential side face of the pump body, and the oil pipe penetrates through the jacket and is communicated with the driving chamber.
Further, a T-shaped sealing sleeve is arranged between the pipe body and the air inlet end, and a through hole matched with the flange is formed in the T-shaped sealing sleeve.
The invention has the following beneficial effects:
1. According to the invention, the force application assembly is designed, the screw reverse rotation condition is avoided through the ratchet mechanism, the arc-shaped spring is arranged between the outer gear ring and the shaft body, so that the outer gear ring is provided with a certain pre-provided reverse elastic force, the elastic force is pre-applied to the screw through the outer gear ring and the gear, when the reverse flow trend occurs in the pump body, the elastic force applied by the force application assembly can be used for counteracting the reverse driving force generated by the screw, the problem of screw rotation or rotation speed reduction caused by reverse flow is avoided, the anti-reverse flow function is realized, the air extraction efficiency of a product is improved, the pump body efficiency is improved, the back pressure required to bear by a driving motor can be reduced, the motor power can be reduced, and the energy saving effect is achieved.
2. The anti-backflow component has the function of a one-way valve, the designed anti-backflow component has adjustable pressure resistance, the pressure can be correspondingly adjusted according to the working requirements, the application range is wider, the backflow condition caused by pressure difference is avoided, the air extraction efficiency is improved, and the energy-saving effect is achieved.
3. According to the invention, by designing the novel rotor structure, the compression ratio of the exhaust end of the screw vacuum pump can be effectively reduced, the compression ratio is stable, the situation of partial over-compression of the exhaust end of the traditional vacuum pump is avoided, the compression ratio of each section of screw is effectively distributed, so that the energy consumption of the pump can be greatly reduced, and the exhaust temperature rise of the screw vacuum pump can be effectively reduced.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an energy-saving anti-backflow variable pitch screw vacuum pump;
FIG. 2 is a schematic structural view of an anti-reflux assembly;
FIG. 3 is a cross-sectional view of the structure of the anti-reflux assembly;
FIG. 4 is a schematic structural view of a force application assembly;
In the drawings, the list of components represented by the various numbers is as follows:
1-pump body, 2-screw, 3-backflow prevention component, 4-force application component, 101-baffle, 102-compression chamber, 103-driving chamber, 104-air inlet end, 105-air outlet end, 106-jacket, 107-driving motor, 108-sealing cover, 109-high temperature resistant sealing piece, 110-oil pipe, 201-gear, 301-pipe body, 302-slide bar, 303-flange, 304-conical pipe, 305-end pipe, 306-supporting plate, 307-bottom plate, 308-sealing bag, 309-upper cover plate, 310-straight spring, 311-T-shaped sealing sleeve, 401-shaft body, 402-outer gear ring, 403-ratchet mechanism, 404-supporting plate, 405-annular rod, 406-pushing plate and 407-arc spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but 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.
Referring to fig. 1-4, the invention discloses an energy-saving anti-backflow variable pitch screw vacuum pump, which comprises a pump body 1, an anti-backflow component 3 and a force application component 4, wherein a partition board 101 is arranged at one end in the pump body 1, the partition board 101 divides the pump body 1 into a driving chamber 103 and a compression chamber 102, two mutually meshed screws 2 are arranged in the compression chamber 102, a gear 201 is fixed at one end of each screw 2 positioned in the driving chamber 103, the two gears 201 are meshed, and an air inlet end 104 and an air outlet end 105 are arranged on the compression chamber 102;
The anti-reflux assembly 3 comprises a tube body 301 and a slide bar 302;
The pipe body 301 is fixed in the air inlet end 104 through a flange 303, the other end of the pipe body 301 is fixed with an end pipe 305 through a conical pipe 304, and a supporting plate 306 is fixed in the pipe body 301 near one end of the conical pipe 304;
The sliding rod 302 is arranged on the supporting plate 306 in a sliding way, a bottom plate 307 is fixed at one end of the sliding rod 302 close to the end pipe 305, a sealing bag 308 opposite to the end pipe 305 is fixed on the top surface of the bottom plate 307, an upper cover plate 309 is connected with the other end of the sliding rod 302 in a threaded way, and a straight spring 310 is arranged between the upper cover plate 309 and the supporting plate 306;
the force application assembly 4 comprises a shaft body 401 and an outer gear ring 402;
one end of the shaft body 401 is fixed in the driving chamber 103 through a ratchet mechanism 403, a plurality of support plates 404 are fixed at the other end of the shaft body 401, annular rods 405 are fixedly penetrated on the plurality of support plates 404, and a plurality of arc-shaped openings are formed between the plurality of support plates 404;
A plurality of pushing plates 406 are fixed on the inner wall of the outer gear ring 402, the pushing plates 406 are respectively arranged in a plurality of arc-shaped openings and slide along the annular rods 405, one side of each pushing plate 406 is movably connected with the support plate 404 on one side of each arc-shaped opening, and an arc-shaped spring 407 is fixed between the other side of each pushing plate 406 and the support plate 404 on the other side of each arc-shaped opening;
The external ring gear 402 is located on the side of the gear 201 on a screw 2 and meshes with the gear 201.
Wherein, as shown in fig. 1, the screw 2 is a variable pitch screw, and the screw 2 comprises an air inlet section, a compression section and an air exhaust section.
Wherein as shown in figure 1, the air inlet section is a large-pitch spiral part with equal pitch, and the spiral part of the air inlet section is arranged to be 2-3 circles.
Wherein as shown in fig. 1, the pitch of the compression section is sequentially reduced from the air inlet section to the air outlet section, and the spiral part of the compression section is set to 3-5 circles.
Wherein as shown in figure 1, the exhaust section is a small-pitch spiral part with equal pitch, and the spiral part of the exhaust section is arranged to be 2-3 circles.
As shown in fig. 1, a jacket 106 is arranged on the side wall of the pump body 1, and circulating cooling water is arranged in the jacket 106.
As shown in fig. 1, two ends of the pump body 1 are open ends, one end of the pump body 1, which is close to the driving chamber 103, is fixed with a driving motor 107, and an output end of the driving motor 107 is fixed with an end of the screw rod 2, which is far away from the force application assembly 4.
As shown in fig. 1, the other end of the pump body 1 is fixed with a sealing cover 108, and the ends of the two screws 2 are fixed with the sealing cover 108 through bearings.
As shown in fig. 1, a high temperature resistant sealing member 109 is arranged at the joint of the screw 2 and the partition plate 101, an oil pipe 110 is arranged on the circumferential side surface of the pump body 1, and the oil pipe 110 penetrates through the jacket 106 and is communicated with the driving chamber 103.
As shown in fig. 2-3, a T-shaped sealing sleeve 311 is arranged between the pipe body 301 and the air inlet end 104, and a through hole matched with the flange 303 is arranged on the T-shaped sealing sleeve 311.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The utility model provides an energy-conserving anti-reflux pitch screw vacuum pump, includes pump body (1), one end is equipped with baffle (101) in pump body (1), baffle (101) separate pump body (1) into driving chamber (103) and compression chamber (102), be equipped with two intermeshing's screw rod (2) in compression chamber (102), screw rod (2) are located driving chamber (103) one end and are fixed with gear (201), two gear (201) meshing is equipped with inlet end (104) and exhaust end (105), its characterized in that on compression chamber (102): the device also comprises a backflow prevention component (3) and a force application component (4);
The anti-backflow component (3) comprises a pipe body (301) and a sliding rod (302);
The pipe body (301) is fixed in the air inlet end (104) through a flange (303), an end pipe (305) is fixed at the other end of the pipe body (301) through a conical pipe (304), and a supporting plate (306) is fixed at one end, close to the conical pipe (304), in the pipe body (301);
The sliding rod (302) is arranged on the supporting plate (306) in a sliding manner, a bottom plate (307) is fixed at one end, close to the end pipe (305), of the sliding rod (302), a sealing bag (308) which is arranged opposite to the end pipe (305) is fixed on the top surface of the bottom plate (307), an upper cover plate (309) is connected with the other end of the sliding rod (302) in a threaded manner, and a straight spring (310) is arranged between the upper cover plate (309) and the supporting plate (306);
The force application assembly (4) comprises a shaft body (401) and an outer gear ring (402);
one end of the shaft body (401) is fixed in the driving chamber (103) through a ratchet mechanism (403), a plurality of support plates (404) are fixed at the other end of the shaft body (401), annular rods (405) are fixedly penetrated on the support plates (404), and a plurality of arc-shaped openings are formed between the support plates (404);
A plurality of pushing plates (406) are fixed on the inner wall of the outer gear (402), the pushing plates (406) are respectively arranged in a plurality of arc openings and slide along an annular rod (405), one side edge of each pushing plate (406) is movably connected with a support plate (404) on one side of each arc opening, and an arc spring (407) is fixed between the other side edge of each pushing plate (406) and the support plate (404) on the other side of each arc opening;
The outer gear ring (402) is positioned on one side of the gear (201) on a screw (2) and is meshed with the gear (201).
2. An energy-saving anti-backflow variable pitch screw vacuum pump according to claim 1, characterized in that the screw (2) is a variable pitch screw, the screw (2) comprising an intake section, a compression section and an exhaust section.
3. The energy-saving anti-backflow variable-pitch screw vacuum pump according to claim 2, wherein the air inlet section is a constant-pitch large-pitch spiral part, and the spiral part of the air inlet section is arranged to be 2-3 circles.
4. The energy-saving anti-backflow variable pitch screw vacuum pump according to claim 2, wherein the pitch of the compression section is sequentially reduced from the air inlet section to the air outlet section, and the spiral part of the compression section is set to 3-5 circles.
5. The energy-saving anti-backflow variable-pitch screw vacuum pump according to claim 2, wherein the exhaust section is a small-pitch spiral part with equal pitch, and the spiral part of the exhaust section is arranged to be 2-3 circles.
6. The energy-saving anti-backflow variable pitch screw vacuum pump according to claim 1 is characterized in that a jacket (106) is arranged on the side wall of the pump body (1), and circulating cooling water is arranged in the jacket (106).
7. The energy-saving anti-backflow variable-pitch screw vacuum pump according to claim 1, wherein two ends of the pump body (1) are open ends, one end of the pump body (1) close to the driving chamber (103) is fixedly provided with a driving motor (107), and the output end of the driving motor (107) is fixed with the end part of the screw (2) far away from the force application assembly (4).
8. The energy-saving anti-backflow variable pitch screw vacuum pump according to claim 7, wherein a sealing cover (108) is fixed at the other end of the pump body (1), and the two screw (2) ends are fixed with the sealing cover (108) through bearings.
9. The energy-saving anti-backflow variable pitch screw vacuum pump according to claim 6, wherein a high-temperature-resistant sealing piece (109) is arranged at the joint of the screw (2) and the partition plate (101), an oil pipe (110) is arranged on the peripheral side surface of the pump body (1), and the oil pipe (110) penetrates through the jacket (106) and is communicated with the driving chamber (103).
10. The energy-saving anti-backflow variable pitch screw vacuum pump according to claim 1, wherein a T-shaped sealing sleeve (311) is arranged between the pipe body (301) and the air inlet end (104), and a through hole matched with the flange (303) is formed in the T-shaped sealing sleeve (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8004488U1 (en) * | 1980-02-20 | 1981-09-03 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | WING CELL VACUUM PUMP WITH A PREVACUATION OF THE SUCTION CLEANING, IN PARTICULAR FOR BRAKE FORCE REINFORCEMENT IN MOTOR VEHICLES |
| EP0176270A2 (en) * | 1984-09-20 | 1986-04-02 | Eaton Corporation | Supercharger with reduced noise and improved efficiency |
| CN1961153A (en) * | 2004-05-24 | 2007-05-09 | 纳博特斯克株式会社 | Screw rotor and screw type fluid machine |
| CN109450167A (en) * | 2019-01-14 | 2019-03-08 | 中国船舶重工集团公司第七0三研究所 | A kind of mechatronics integration speed-regulating system and its soft-start method |
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- 2022-04-25 CN CN202210440051.0A patent/CN114876795B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8004488U1 (en) * | 1980-02-20 | 1981-09-03 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | WING CELL VACUUM PUMP WITH A PREVACUATION OF THE SUCTION CLEANING, IN PARTICULAR FOR BRAKE FORCE REINFORCEMENT IN MOTOR VEHICLES |
| EP0176270A2 (en) * | 1984-09-20 | 1986-04-02 | Eaton Corporation | Supercharger with reduced noise and improved efficiency |
| CN1961153A (en) * | 2004-05-24 | 2007-05-09 | 纳博特斯克株式会社 | Screw rotor and screw type fluid machine |
| CN109450167A (en) * | 2019-01-14 | 2019-03-08 | 中国船舶重工集团公司第七0三研究所 | A kind of mechatronics integration speed-regulating system and its soft-start method |
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| CN114876795A (en) | 2022-08-09 |
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