CN113250930A - Double-cylinder vacuum pump - Google Patents
Double-cylinder vacuum pump Download PDFInfo
- Publication number
- CN113250930A CN113250930A CN202110471120.XA CN202110471120A CN113250930A CN 113250930 A CN113250930 A CN 113250930A CN 202110471120 A CN202110471120 A CN 202110471120A CN 113250930 A CN113250930 A CN 113250930A
- Authority
- CN
- China
- Prior art keywords
- pump body
- cylinder
- sliding
- piston
- vacuum pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/005—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
- F04B39/0292—Lubrication of pistons or cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
- F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
- F04B39/042—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod sealing being provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1006—Adaptations or arrangements of distribution members the members being ball valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention relates to the technical field of vacuum pumps, in particular to a double-cylinder vacuum pump which comprises a pump body, a first cylinder, a second cylinder, a motor and a controller, wherein the pump body is provided with a first cylinder and a second cylinder; two ends of the pump body are provided with first step holes; a first check valve is arranged in the first step hole; the interior of the pump body is connected with a piston in a sliding way; the piston divides the interior of the pump body into a rod cavity and a rodless cavity; according to the invention, the motor drives the piston to slide along the inner wall of the pump body, so that external gas can enter the pump body along the first cylinder and the second cylinder and then is discharged along the first one-way valves at the two ends of the pump body, and compared with the prior art, the efficiency of vacuumizing in the technical scheme is improved; meanwhile, the abrasion and the sealing of the piston are processed, the vacuum degree required by the gas extracted by the vacuum pump is improved, the influence of the abrasion of the piston on the gas extracted by the pump body is reduced, the noise generated during working is also reduced, and the working efficiency of the vacuum pump is improved.
Description
Technical Field
The invention relates to the technical field of vacuum pumps, in particular to a double-cylinder vacuum pump.
Background
The vacuum pump is a device or equipment which uses a mechanical, physical, chemical or physicochemical method to pump the pumped container to obtain vacuum; in popular terms, vacuum pumps are devices that use various methods to improve, create and maintain a vacuum in a confined space; at present, the traditional reciprocating single-cylinder vacuum pump makes use of the piston in the pump cavity to do reciprocating motion, so that gas is sucked, compressed and discharged out of a vacuum chamber, and the gas pressure in the vacuum chamber is reduced to enable the gas to reach the required vacuum degree; the abrasion of the transmission part of the vacuum pump is a common problem, the traditional method mainly adopts repair welding and brush plating spraying, the thermal stress generated by the high temperature of the repair welding can not be completely eliminated, and the material is easy to be damaged, so that the part is bent or broken; the electric brush plating is limited by the thickness of the coating and is easy to peel off; the traditional reciprocating vacuum pump has the defects that the working vacuum degree is continuously reduced along with the increase of the maintenance times, the working noise is high, the failure rate is high, and the production working efficiency is influenced; and the double-cylinder vacuum pump has better vacuum pumping effect than the traditional vacuum pump, and the pump body runs stably.
Some technical schemes related to a double-cylinder vacuum pump also appear in the prior art, for example, a chinese patent with application number cn201910642955.x discloses a double-cylinder vacuum pump, which comprises a first cylinder, a second cylinder and a heat conducting cover plate, wherein the first cylinder and the second cylinder are arranged side by side, and a piston, a guiding telescopic rod and a two-way shape memory metal strip with an acute-angle high-temperature phase and an I-shaped low-temperature phase are arranged in the first cylinder and the second cylinder; the first cylinder and the second cylinder are both fixedly connected with the heat-conducting cover plate, one end of the guide telescopic rod is fixedly connected with the heat-conducting cover plate, and the other end of the guide telescopic rod is fixedly connected with the piston; two ends of the double-stroke shape memory metal strip are respectively provided with a hinge joint, the hinge joints at the two ends of the double-stroke shape memory metal strip are respectively fixedly connected with the piston and the heat-conducting cover plate, and the two ends of the double-stroke shape memory metal strip are hinged with the piston and the heat-conducting cover plate through the hinge joints; the vacuum pump electric energy consumption of this technical scheme double cylinder formula is less, but does not consider that two-way shape memory metal warp inefficiency, influences vacuum pump evacuation efficiency, and the heat that the heat conduction apron carried simultaneously needs the electric energy to maintain, and two-way shape memory metal is with high costs, and piston wearing and tearing lead to the pump body effect of bleeding not good easily to cause the limitation of this scheme.
In view of the above, in order to overcome the above technical problems, the present invention provides a dual cylinder vacuum pump, which solves the above technical problems.
Disclosure of Invention
In order to make up the defects of the prior art, the double-cylinder vacuum pump provided by the invention has the advantages that the piston is driven by the motor to slide along the inner wall of the pump body, so that external gas can enter the pump body along the first cylinder and the second cylinder and then is discharged along the first one-way valves at the two ends of the pump body, and compared with the prior art, the efficiency of vacuumizing in the technical scheme is improved; meanwhile, the abrasion and the sealing of the piston are processed, the vacuum degree required by the gas extracted by the vacuum pump is improved, the influence of the abrasion of the piston on the gas extracted by the pump body is reduced, the noise generated during working is also reduced, and the working efficiency of the vacuum pump is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a double-cylinder vacuum pump which comprises a pump body, a first cylinder, a second cylinder, a motor and a controller, wherein the pump body is provided with a first cylinder and a second cylinder; the pump body is pot-shaped, and two ends of the pump body are provided with first step holes; a first check valve is arranged in the first step hole; the gas in the pump body can be discharged from the first one-way valve, and the piston is connected in the pump body in a sliding manner; the piston divides the interior of the pump body into a rod cavity and a rodless cavity, and one end face of the piston is hinged with a connecting rod; the connecting rod is positioned in the rod cavity; a turntable is arranged in the rod cavity; the turntable is eccentrically connected with the other end of the connecting rod; a support is arranged below the pump body; the support is fixedly connected with the pump body, and a motor is arranged on the support; an output shaft of the motor penetrates through the pump body and extends into the rod cavity, the output shaft of the motor is concentrically connected with the rotary table, and the motor can drive the piston to slide along the inner wall of the pump body through the rotary table; the first cylinder and the second cylinder are positioned above the pump body and fixedly connected with the pump body, and second stepped holes are formed in the first cylinder and the second cylinder; a second one-way valve is arranged in the second step hole; the gas outside the pump body can enter the rodless cavity through the first cylinder, and the gas outside the pump body can enter the rod cavity through the second cylinder; the controller is used for controlling the automatic operation of the double-cylinder vacuum pump.
The during operation, because prior art is not enough, two-way shape memory metal warp inefficiency, influences vacuum pump evacuation efficiency, and the heat that the heat conduction apron was carried simultaneously needs the electric energy to maintain, and two-way shape memory metal is with high costs, and vacuum pump transmission position wearing and tearing are ubiquitous problem, cause the vacuum pump leakproofness to descend after the piston wearing and tearing easily, and the extraction gas effect is poor, and leads to the pump body to break down easily, influences vacuum pump work efficiency.
When the vacuum pump performs air extraction work, a worker starts the controller to control the motor to rotate, the motor drives the rotary table fixedly connected in the vacuum pump to rotate, and the rotary table drives the connecting rod on the piston to rotate, so that the piston performs reciprocating motion in the pump body; when the piston moves towards the direction of the rodless cavity along the inner wall of the pump body, external air enters the pump body through the second air cylinder, and meanwhile, air in the pump body is discharged through the first one-way valve at one end of the rodless cavity and seals the first air cylinder; when the piston moves towards the direction of the rod cavity along the inner wall of the pump body, external air enters the pump body through the first air cylinder, and meanwhile, air in the pump body is discharged through the first one-way valve at one end of the rod cavity and seals the second air cylinder; the piston circularly reciprocates, the first cylinder and the second cylinder circularly suck air, and meanwhile, the first one-way valves at the two ends of the pump body continuously exhaust air, so that the air exhaust effect of the vacuum pump is improved.
According to the invention, the motor drives the piston to slide along the inner wall of the pump body, so that external gas can enter the pump body along the first cylinder and the second cylinder and then is discharged along the first one-way valves at the two ends of the pump body, and compared with the prior art, the efficiency of vacuumizing in the technical scheme is improved; meanwhile, the abrasion and the sealing of the piston are processed, the vacuum degree required by the gas extracted by the vacuum pump is improved, the influence of the abrasion of the piston on the gas extracted by the pump body is reduced, the noise generated during working is also reduced, and the working efficiency of the vacuum pump is improved.
Preferably, an annular groove is formed in the outer wall of the piston; the section of the annular groove is rectangular, and two sliding belts are connected to the annular groove in a sliding manner; the sliding belt is arc-shaped; a first spring is arranged in the annular groove; the first spring is positioned between the groove bottom of the annular groove and the sliding belt, one end of the first spring is connected with the groove bottom of the annular groove, and the other end of the first spring is connected with the corresponding sliding belt; a sealing module is arranged between the end faces of the tail ends of the two sliding belts; the sealing module is matched with the two sliding belts to form annular groove sealing.
When the pump works, when the piston does reciprocating motion in the pump body, the annular groove on the outer wall of the piston is connected with two arc-shaped sliding belts in a sliding way, the annular groove is connected with the sliding belts through a first spring, and the sliding belts are attached to the inner wall of the pump body due to the elasticity of the first spring; when the piston carries out long-time reciprocating motion at the pump body inner wall, the outer wall of piston can produce wearing and tearing, and the slide belt on the piston outer wall can further laminate the pump body inner wall through a spring force this moment to reach synchronous sealed purpose, prevent to cause the pump body interior gas tightness because of piston wearing and tearing to descend, influence the vacuum pump and breathe in and compress exhaust effect, thereby be difficult to reach the required working vacuum degree.
Preferably, the sealing module comprises a sliding block and a second spring; a rectangular groove is formed in one end face of the sliding belt; one groove wall of the rectangular groove is communicated with the outer wall of the sliding belt, and the sliding block is connected in the rectangular groove in a sliding manner; the second spring is arranged between the sliding block and the bottom of the rectangular groove, one end of the second spring is connected with the bottom of the rectangular groove, and the other end of the second spring is connected with the sliding block; the during operation, the sliding strip that is in on the piston outer wall can receive wearing and tearing because the long-time reciprocating motion of piston, and the sliding strip can produce the clearance simultaneously, the slider can support another sliding strip under the effect of No. two spring elastic forces, and two sliding strips mutually support and further maintained the gas tightness in the vacuum pump body, prevent to cause the leakproofness to descend because of the clearance that sliding strip friction loss produced, influence the vacuum pump effect of bleeding, guaranteed the vacuum that the vacuum pump during operation required.
Preferably, a first magnet block is embedded in one end face, facing the sliding belt, of the sliding block; a second magnet block is embedded in one end face, facing the sliding block, of the other sliding belt; the first magnet block and the second magnet block are opposite in magnetism, and the first magnet block is in contact with the second magnet block through sliding of the sliding block; when the vacuum pump works, the slider at the tail end of the sliding belt is also subjected to the magnetic force between the magnet block I and the magnet block II on the basis of the elastic force of the spring, the two forces are mutually matched to firmly support the slider and the other sliding belt, and the mutually matched sealing performance of the two sliding belts is maintained, so that the air tightness of the piston in the long-time reciprocating motion in the pump body is ensured, and the sealing performance of the vacuum pump is further improved.
Preferably, the outer walls of the two sliding belts are uniformly provided with rolling grooves for mounting rollers; the rolling groove is U-shaped, and a roller is rotatably connected between two side walls in the rolling groove through a bearing; the outer wall of the roller is tangent to the sliding belt; when the vacuum pump works, the outline of the roller tightly clings to the outer wall of the piston, the piston clings to the inner wall of the pump body, and the rolling friction of the roller is far less than the sliding friction during working, so that the friction force generated by the piston during reciprocating motion on the inner wall of the pump body is greatly reduced, the piston abrasion effect is further reduced, the service life of the piston is prolonged, meanwhile, the noise generated during the working of the vacuum pump is also reduced, and the practical effect of the vacuum pump is improved.
Preferably, a through hole is formed in the sliding belt and used for discharging the lubricant; one end of the through hole is communicated with the bottom of the rolling groove, and the other end of the through hole is communicated with the annular groove; a lubricant is filled in the annular groove, the piston reciprocates to generate high temperature, and the lubricant expands under heat; preferably, the lubricant is an oil; when the piston oil seal device works, the piston reciprocates, the roller on the piston rotates, the lubricant in the annular groove on the piston is discharged to the rolling groove through the through hole at high temperature, the roller rotates to paint the lubricant on the inner wall of the pump body, the friction loss between the piston and the pump body is further reduced, and meanwhile, the oil seal is carried out on a gap possibly existing between the piston abrasion and the inner wall of the pump body, so that the sealing performance of the pump body is further improved, and the piston oil seal device has practical value.
The invention has the following beneficial effects:
1. according to the invention, the motor drives the piston to slide along the inner wall of the pump body, so that external gas can enter the pump body along the first cylinder and the second cylinder and then is discharged along the first one-way valves at the two ends of the pump body, the air extraction effect of the vacuum pump is greatly improved, and the working efficiency of the vacuum pump is improved.
2. The invention is characterized in that two arc-shaped sliding belts are connected in an annular groove on the outer wall of the piston in a sliding manner, the annular groove is connected with the sliding belts through springs, and the sliding belts are attached to the inner wall of the pump body due to the elasticity of the springs; when the outer wall of the piston is abraded, the sliding belt can be further attached to the inner wall of the pump body through the elastic force of the spring, so that the purpose of synchronous sealing is achieved, and the problem that the air tightness of the pump body is reduced due to the abrasion of the piston to influence the air exhaust effect of the vacuum pump is avoided.
3. The invention greatly reduces the friction force between the piston and the inner wall of the pump body through the rolling friction of the roller, further reduces the abrasion effect of the piston, prolongs the service life of the piston, and simultaneously reduces the noise generated when the vacuum pump works. Meanwhile, the lubricant in the invention is discharged to the inner wall of the pump body through the through hole under the action of the rotation of the roller, so that the friction loss between the piston and the pump body is further reduced, and simultaneously, the oil seal is carried out on the gap possibly existing between the piston and the inner wall of the pump body, so that the sealing property of the pump body is further improved, and the practical effect of the invention is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a cross-sectional view of the piston of the present invention;
FIG. 5 is an enlarged view at B in FIG. 4;
in the figure: 1. a pump body; 11. a first cylinder; 111. a second stepped bore; 112. a second one-way valve; 12. a second cylinder; 13. a first stepped bore; 131. a first check valve; 14. a rodless cavity; 15. a rod cavity; 151. a connecting rod; 152. a turntable; 16. a support; 2. a motor; 3. a piston; 31. an annular groove; 32. a slide belt; 33. a first spring; 34. a sealing module; 341. a second spring; 342. a slider; 343. a rectangular groove; 344. a first magnet block; 345. a second magnet block; 35. a rolling groove; 351. a through hole; 36. and a roller.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the vacuum pump of the present invention includes a pump body 1, a first cylinder 11, a second cylinder 12, a motor 2 and a controller; the pump body 1 is pot-shaped, and two ends of the pump body 1 are provided with first step holes 13; a first check valve 131 is installed in the first stepped hole 13; the gas in the pump body 1 can be discharged from the first one-way valve 131, and the piston 3 is connected in the pump body 1 in a sliding manner; the piston 3 divides the interior of the pump body 1 into a rod cavity 15 and a rodless cavity 14, and one end face of the piston 3 is hinged with a connecting rod 151; the connecting rod 151 is positioned inside the rod chamber 15; a rotary disc 152 is arranged inside the rod cavity 15; the rotary disc 152 is eccentrically connected with the other end of the connecting rod 151; a support 16 is arranged below the pump body 1; the support 16 is fixedly connected with the pump body 1, and the motor 2 is arranged on the support 16; the output shaft of the motor 2 penetrates through the pump body 1 and extends to the inside of the rod cavity 15, the output shaft of the motor 2 is concentrically connected with the rotary table 152, and the motor 2 can drive the piston 3 to slide along the inner wall of the pump body 1 through the rotary table 152; the first cylinder 11 and the second cylinder 12 are positioned above the pump body 1, the first cylinder 11 and the second cylinder 12 are fixedly connected with the pump body 1, and second stepped holes 111 are formed in the first cylinder 11 and the second cylinder 12; a second check valve 112 is installed in the second stepped hole 111; the gas outside the pump body 1 can enter the rodless cavity 14 through the first cylinder 11, and the gas outside the pump body 1 can enter the rod cavity 15 through the second cylinder 12; the controller is used for controlling the automatic operation of the double-cylinder vacuum pump;
when the vacuum pump works, due to the defects of the prior art, the abrasion of the transmission part of the vacuum pump is a common problem, the sealing performance of the vacuum pump is easily reduced after the piston is abraded, the gas extraction effect is poor, the pump body is easily broken down, and the working efficiency of the vacuum pump is influenced;
therefore, when the vacuum pump performs air extraction work, the starting controller controls the motor 2 to rotate, the motor 2 drives the rotary table 152 fixedly connected in the vacuum pump to rotate, and the rotary table 152 drives the connecting rod 151 on the piston 3 to rotate, so that the piston 3 performs reciprocating motion in the pump body 1; when the piston 3 moves to the rodless chamber 14, the first cylinder 11 and the second cylinder 12 simultaneously intake air through the second check valve 112 of the second stepped bore 111 inside, while the air is discharged through the first check valve 131 in the first stepped bore 13 at one end of the rodless chamber 14; when the piston 3 moves towards the direction of the rod cavity 15, the first cylinder 11 is sealed when passing right below the first cylinder 11, and meanwhile, the second cylinder 12 sucks air; when the piston 3 moves to the position right below the second cylinder 12, the second cylinder 12 is sealed, meanwhile, the first cylinder 11 sucks air, and the air is discharged through a first one-way valve 131 in a first stepped hole 13 at one end of the rod cavity 15; the piston 3 circularly reciprocates, the first cylinder 11 and the second cylinder 12 circularly suck air, and meanwhile, the first one-way valves 131 at the two ends of the pump body 1 continuously discharge air, so that the air suction effect of the vacuum pump is improved;
according to the invention, through circulating air intake of the double cylinders, the piston 3 reciprocates in the pump body 1 of the vacuum pump to continuously compress gas, and the gas entering the rod cavity 15 and the rodless cavity 14 is circularly discharged through the first one-way valves 131 at the two ends of the pump body 1, so that the air extraction effect of the vacuum pump is greatly improved, and the working efficiency of the vacuum pump is improved.
As an embodiment of the present invention, an annular groove 31 is provided on the outer wall of the piston 3; the section of the annular groove 31 is rectangular, and two sliding belts 32 are connected to the annular groove 31 in a sliding manner; the sliding belt 32 is arc-shaped; a first spring 33 is arranged in the annular groove 31; the first spring 33 is positioned between the groove bottom of the annular groove 31 and the sliding belt 32, one end of the first spring 33 is connected with the groove bottom of the annular groove 31, and the other end of the first spring 33 is connected with the corresponding sliding belt 32; a sealing module 34 is arranged between the end faces of the tail ends of the two sliding belts 32; the sealing module 34 is matched with the two sliding belts 32 to form the annular groove 31 for sealing;
when the reciprocating pump works, when the piston 3 reciprocates in the pump body 1, the two circular arc-shaped sliding belts 32 are connected in the annular groove 31 on the outer wall of the piston 3 in a sliding manner, the annular groove 31 is connected with the sliding belts 32 through the first spring 33, and the sliding belts 32 are attached to the inner wall of the pump body 1 due to the elasticity of the first spring 33; when the piston 3 reciprocates for a long time on the inner wall of the pump body 1, the outer wall of the piston 3 is abraded, and the sliding belt 32 on the outer wall of the piston 3 can be further attached to the inner wall of the pump body 1 through the elastic force of the first spring 33, so that the purpose of synchronous sealing is achieved, the phenomenon that the airtightness in the pump body 1 is reduced due to abrasion of the piston 3, the effect of air suction and compression exhaust of the vacuum pump is influenced, and the required working vacuum degree is difficult to achieve.
As an embodiment of the present invention, the sealing module 34 includes a slider 342 and a second spring 341; a rectangular groove 343 is formed in one end face of the sliding belt 32; one groove wall of the rectangular groove 343 is communicated with the outer wall of the slide belt 32, and the slider 342 is connected in the rectangular groove 343 in a sliding manner; the second spring 341 is arranged between the sliding block 342 and the bottom of the rectangular groove 343, one end of the second spring 341 is connected with the bottom of the rectangular groove 343, and the other end is connected with the sliding block 342; during operation, the sliding belt 32 on the outer wall of the piston 3 is abraded due to long-time reciprocating motion of the piston 3, meanwhile, the sliding belt 32 generates a gap, the sliding block 342 can abut against the other sliding belt 32 under the action of the elastic force of the second spring 341, the two sliding belts 32 are mutually matched to well maintain the air tightness in the vacuum pump body 1, the problem that the sealing performance is reduced due to the gap generated by friction loss of the sliding belts 32, the air suction effect of the vacuum pump is influenced is solved, and the vacuum degree required by the vacuum pump during operation is ensured.
In one embodiment of the present invention, a first magnet block 344 is embedded in one end surface of the slider 342 facing the slide belt 32; a second magnet block 345 is embedded in one end surface of the other slide belt 32 facing the slide block 342; the first magnet block 344 is opposite to the second magnet block 345 in magnetism, and the first magnet block 344 slides through the sliding block 342 to be in contact with the second magnet block 345; when the vacuum pump works, the slider 342 at the tail end of the sliding belt 32 is under the action of the elastic force of the spring and the attraction force between the magnet blocks on the slider 342, and the two forces are mutually matched to firmly support the slider and the other sliding belt, so that the mutual matching sealing performance of the two sliding belts is maintained, the air sealing of the piston 3 which does long-time reciprocating motion in the pump body 1 is ensured, and the sealing performance of the vacuum pump is further improved.
As an embodiment of the present invention, the outer walls of the two sliding belts 32 are uniformly provided with rolling grooves 35 for installing rollers 36; the rolling groove 35 is U-shaped, and a roller 36 is rotatably connected between two side walls in the rolling groove 35 through a bearing; the outer wall of the roller 36 is tangent to the sliding belt 32; when the vacuum pump works, the outline of the roller 36 is tightly attached to the outer wall of the piston 3, the piston 3 is attached to the inner wall of the pump body 1, and the resistance generated by the rolling friction of the roller 36 during working is far smaller than the sliding friction, so that the friction force generated by the piston 3 during reciprocating motion on the inner wall of the pump body 1 is greatly reduced, the abrasion effect of the piston 3 is further reduced, the service life of the piston 3 is prolonged, meanwhile, the noise generated during the working of the vacuum pump is also reduced, and the practical effect of the vacuum pump is improved.
As an embodiment of the present invention, the slide belt 32 is provided with a through hole 351 inside for lubricant discharge; one end of the through hole 351 is communicated with the bottom of the rolling groove 35, and the other end of the through hole is communicated with the annular groove 31; a lubricant is filled in the annular groove 31; when the oil seal device works, the piston 3 reciprocates, the roller 36 on the piston 3 rotates, the lubricant in the annular groove 31 on the piston 3 is discharged to the rolling groove 35 through the through hole 351, the roller 36 rotates to paint the lubricant on the inner wall of the pump body 1, the friction loss between the piston 3 and the pump body 1 is further reduced, and meanwhile, the oil seal is carried out on a gap possibly existing between the abrasion of the piston 3 and the inner wall of the pump body 1, so that the tightness of the pump body 1 is further improved, and the oil seal device has practical value.
When the vacuum pump works, a worker starts the controller to control the motor 2 to rotate, the motor 2 drives the rotary table 152 fixedly connected in the vacuum pump to rotate, and the rotary table 152 drives the connecting rod 151 on the piston 3 to rotate, so that the piston 3 reciprocates in the pump body 1; when the piston 3 moves to the rodless chamber 14, the first cylinder 11 and the second cylinder 12 simultaneously intake air through the second check valve 112 of the second stepped bore 111 inside, while the air is discharged through the first check valve 131 in the first stepped bore 13 at one end of the rodless chamber 14; when the piston 3 moves towards the direction of the rod cavity 15, the first cylinder 11 is sealed when passing right below the first cylinder 11, and meanwhile, the second cylinder 12 sucks air; when the piston 3 moves to the position right below the second cylinder 12, the second cylinder 12 is sealed, meanwhile, the first cylinder 11 sucks air, and the air is discharged through a first one-way valve 131 in a first stepped hole 13 at one end of the rod cavity 15; the piston 3 circularly reciprocates, the first cylinder 11 and the second cylinder 12 circularly suck air, and meanwhile, the first one-way valves 131 at the two ends of the pump body 1 continuously discharge air; two arc-shaped sliding belts 32 are connected in an annular groove 31 on the outer wall of the piston 3 in a sliding manner, the annular groove 31 and the sliding belts 32 are connected through a first spring 33, and the sliding belts 32 are attached to the inner wall of the pump body 1 due to the elasticity of the first spring 33; when the piston 3 reciprocates in the inner wall of the pump body 1 for a long time, the outer wall of the piston 3 is abraded, and the slide belt 32 on the outer wall of the piston 3 can be further attached to the inner wall of the pump body 1 through the elastic force of the first spring 33; meanwhile, the slide belt 32 is worn due to the long-time reciprocating motion of the piston 3, the slide belt 32 generates a gap, the slide block 342 can abut against the other slide belt 32 under the action of the elastic force of the second spring 341, the two slide belts 32 are matched with each other, meanwhile, the slide block 342 at the tail end of the slide belt 32 is also subjected to the attractive force between the magnet blocks on the slide block 342 on the basis of the elastic force of the spring, and the two forces are matched with each other so as to firmly abut against the slide block 342 and the other slide belt 32, so that the mutually matched sealing performance of the two slide belts 32 is maintained; a roller 36 is rotatably connected between the two side walls in the rolling groove 35 through a bearing; the outer wall of the roller 36 is tangent to the sliding belt 32, when the piston 3 reciprocates in the pump body 1, the outline of the roller 36 tightly sticks to the outer wall of the piston 3, the piston 3 sticks to the inner wall of the pump body 1, the roller 36 on the piston 3 rotates, the lubricant in the annular groove 31 on the piston 3 is discharged to the rolling groove 35 through the through hole 351, the roller 36 rotates to paint the lubricant to the inner wall of the pump body 1, the friction loss between the piston 3 and the pump body 1 is further reduced, and meanwhile, oil sealing is performed on a gap possibly existing between the abrasion of the piston 3 and the inner wall of the pump body 1.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A vacuum pump of double cylinder formula which characterized in that: the device comprises a pump body (1), a first cylinder (11), a second cylinder (12), a motor (2) and a controller; the pump body (1) is pot-shaped, and two ends of the pump body (1) are provided with first step holes (13); a first one-way valve (131) is installed in the first stepped hole (13); the gas in the pump body (1) can be discharged from the first one-way valve (131), and the piston (3) is connected in a sliding manner in the pump body (1); the piston (3) divides the interior of the pump body (1) into a rod cavity (15) and a rodless cavity (14), and one end face of the piston (3) is hinged with a connecting rod (151); the connecting rod (151) is positioned inside the rod cavity (15); a rotary disc (152) is arranged in the rod cavity (15); the rotary disc (152) is eccentrically connected with the other end of the connecting rod (151); a support (16) is arranged below the pump body (1); the support (16) is fixedly connected with the pump body (1), and the motor (2) is installed on the support (16); an output shaft of the motor (2) penetrates through the pump body (1) and extends into the rod cavity (15), the output shaft of the motor (2) is concentrically connected with the rotary table (152), and the motor (2) can drive the piston (3) to slide along the inner wall of the pump body (1) through the rotary table (152); the first cylinder (11) and the second cylinder (12) are positioned above the pump body (1), the first cylinder (11) and the second cylinder (12) are fixedly connected with the pump body (1), and second stepped holes (111) are formed in the first cylinder (11) and the second cylinder (12); a second one-way valve (112) is installed in the second stepped hole (111); the gas outside the pump body (1) can enter the rodless cavity (14) through the first cylinder (11), and the gas outside the pump body (1) can enter the rod cavity (15) through the second cylinder (12); the controller is used for controlling the automatic operation of the double-cylinder vacuum pump.
2. A vacuum pump of the twin cylinder type according to claim 1, wherein: an annular groove (31) is formed in the outer wall of the piston (3); the section of the annular groove (31) is rectangular, and two sliding belts (32) are connected to the annular groove (31) in a sliding manner; the sliding belt (32) is arc-shaped; a first spring (33) is arranged in the annular groove (31); the first spring (33) is positioned between the groove bottom of the annular groove (31) and the sliding belt (32), one end of the first spring (33) is connected with the groove bottom of the annular groove (31), and the other end of the first spring is connected with the corresponding sliding belt (32); a sealing module (34) is arranged between the end faces of the tail ends of the two sliding belts (32); the sealing module (34) is matched with the two sliding belts (32) to form an annular groove (31) seal.
3. A vacuum pump of the twin cylinder type according to claim 2, wherein: the sealing module (34) comprises a sliding block (342) and a second spring (341); one end face of the sliding belt (32) is provided with a rectangular groove (343); one groove wall of the rectangular groove (343) is communicated with the outer wall of the sliding belt (32), and the sliding block (342) is connected in the rectangular groove (343) in a sliding way; the second spring (341) is arranged between the sliding block (342) and the bottom of the rectangular groove (343), one end of the second spring (341) is connected with the bottom of the rectangular groove (343), and the other end is connected with the sliding block (342); the sliding block (342) can prop against the other sliding belt (32) under the action of the elastic force of the second spring (341).
4. A vacuum pump of the double cylinder type according to claim 3, wherein: a first magnet block (344) is embedded in one end face, facing the slide belt (32), of the slide block (342); a second magnet block (345) is embedded in one end face, facing the sliding block (342), of the other sliding belt (32); the first magnet block (344) is opposite to the second magnet block (345) in magnetism, and the first magnet block (344) is in contact with the second magnet block (345) through sliding of the sliding block.
5. A vacuum pump of the double cylinder type according to claim 4, characterized in that: rolling grooves (35) are uniformly formed in the outer walls of the two sliding belts (32); the rolling groove (5) is U-shaped, and a roller (36) is rotatably connected between two side walls in the rolling groove (35) through a bearing; the outer wall of the roller (36) is tangent to the sliding belt (32).
6. A vacuum pump of the twin cylinder type according to claim 5, wherein: a through hole (351) is formed in the sliding belt (32); one end of the through hole (351) is communicated with the bottom of the rolling groove (35), and the other end of the through hole is communicated with the annular groove (31); and a lubricant is filled in the annular groove (31), and is discharged through the through hole (351) under the action of the rotation of the roller (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471120.XA CN113250930A (en) | 2021-04-29 | 2021-04-29 | Double-cylinder vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471120.XA CN113250930A (en) | 2021-04-29 | 2021-04-29 | Double-cylinder vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250930A true CN113250930A (en) | 2021-08-13 |
Family
ID=77222603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110471120.XA Pending CN113250930A (en) | 2021-04-29 | 2021-04-29 | Double-cylinder vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250930A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1566575A (en) * | 1975-12-24 | 1980-05-08 | Commw Scient Ind Res Org | Pumps of the piston and cylinder type |
| US5526962A (en) * | 1993-05-10 | 1996-06-18 | Medimpex Ets. | Double piston pump for administering medication |
| CN101328885A (en) * | 2008-07-30 | 2008-12-24 | 辽宁恒星泵业有限公司 | High-efficiency wear-resistant sludge pump |
| CN102678507A (en) * | 2012-05-24 | 2012-09-19 | 陈人德 | Double-acting hydraulic ejecting type vacuumizing and compressing device of double cylinders |
| CN203463254U (en) * | 2013-09-26 | 2014-03-05 | 天津市海雅实业有限公司 | Hydraulic air vacuum pump |
| CN204003366U (en) * | 2014-06-03 | 2014-12-10 | 绍兴县德诚机电设备有限公司 | A kind of Novel reciprocating type air compressor |
| CN205638859U (en) * | 2016-05-19 | 2016-10-12 | 宁波华生压缩机有限公司 | Air compressor |
| CN107448404A (en) * | 2017-09-18 | 2017-12-08 | 黄田 | A kind of high efficiency air compression plant |
| CN208184848U (en) * | 2018-03-30 | 2018-12-04 | 新昌县城关利业机械厂 | A kind of oil cylinder adjusting piston ring |
| CN210422929U (en) * | 2019-07-26 | 2020-04-28 | 北京清源保生物科技有限公司 | Vacuum pump for pesticide production |
-
2021
- 2021-04-29 CN CN202110471120.XA patent/CN113250930A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1566575A (en) * | 1975-12-24 | 1980-05-08 | Commw Scient Ind Res Org | Pumps of the piston and cylinder type |
| US5526962A (en) * | 1993-05-10 | 1996-06-18 | Medimpex Ets. | Double piston pump for administering medication |
| CN101328885A (en) * | 2008-07-30 | 2008-12-24 | 辽宁恒星泵业有限公司 | High-efficiency wear-resistant sludge pump |
| CN102678507A (en) * | 2012-05-24 | 2012-09-19 | 陈人德 | Double-acting hydraulic ejecting type vacuumizing and compressing device of double cylinders |
| CN203463254U (en) * | 2013-09-26 | 2014-03-05 | 天津市海雅实业有限公司 | Hydraulic air vacuum pump |
| CN204003366U (en) * | 2014-06-03 | 2014-12-10 | 绍兴县德诚机电设备有限公司 | A kind of Novel reciprocating type air compressor |
| CN205638859U (en) * | 2016-05-19 | 2016-10-12 | 宁波华生压缩机有限公司 | Air compressor |
| CN107448404A (en) * | 2017-09-18 | 2017-12-08 | 黄田 | A kind of high efficiency air compression plant |
| CN208184848U (en) * | 2018-03-30 | 2018-12-04 | 新昌县城关利业机械厂 | A kind of oil cylinder adjusting piston ring |
| CN210422929U (en) * | 2019-07-26 | 2020-04-28 | 北京清源保生物科技有限公司 | Vacuum pump for pesticide production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20100084079A (en) | Rotary compressor | |
| CN110821781A (en) | Hydraulic air compressor | |
| CN210196009U (en) | Oil-free air compressor | |
| CN101387295A (en) | Double cylinder translation rotating compressing device | |
| CN204357709U (en) | Rotary compressor | |
| CN113250930A (en) | Double-cylinder vacuum pump | |
| KR20070101440A (en) | Hermetic compressor | |
| CN101368564B (en) | Integral translational rotating compression device | |
| CN111059019A (en) | Linear compressor adopting labyrinth clearance sealing piston | |
| JP2008002370A (en) | Compressor | |
| JP2013213477A (en) | Rotary compressor | |
| KR20110101495A (en) | Compressor and refrigerating machine having the same | |
| KR102201409B1 (en) | A rotary compressor | |
| CN114718876B (en) | Oil supply system and compressor | |
| KR20040017446A (en) | Discharge apparatus of reciprocating compressor | |
| CN101328891A (en) | Dual rotors translation type rotary compressing device | |
| CN111005854A (en) | Air compressor | |
| CN218439752U (en) | Rolling needle type rotor compressor component | |
| CN219412926U (en) | Air compressor cylinder with heat insulation groove | |
| KR20020052559A (en) | Rotary compressor | |
| CN116950868B (en) | Low pressure pulsation immersion oil type miniature plunger pump | |
| JP2014015884A (en) | Rotary compressor | |
| CN211819905U (en) | Rotary vane vacuum pump | |
| KR101290849B1 (en) | Rotary pump | |
| CN110131169B (en) | Thrust surface lubricating structure, compressor and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |