CN111197568A - Miniature reciprocating oil-free vacuum pump - Google Patents

Miniature reciprocating oil-free vacuum pump Download PDF

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Publication number
CN111197568A
CN111197568A CN201811381854.3A CN201811381854A CN111197568A CN 111197568 A CN111197568 A CN 111197568A CN 201811381854 A CN201811381854 A CN 201811381854A CN 111197568 A CN111197568 A CN 111197568A
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CN
China
Prior art keywords
valve plate
exhaust
air inlet
cavity
cylinder
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
Application number
CN201811381854.3A
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Chinese (zh)
Inventor
娄施玉
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201811381854.3A priority Critical patent/CN111197568A/en
Publication of CN111197568A publication Critical patent/CN111197568A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • 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
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0044—Pulsation and noise damping means with vibration damping supports
    • 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
    • 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
    • F04B39/121—Casings
    • 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

Abstract

The invention relates to a miniature reciprocating oil-free vacuum pump which is characterized in that an air inlet cavity is coaxially and fixedly butted with a port on one side of an air cylinder, an air exhaust cavity is coaxially and fixedly butted with a port on the other side of the air cylinder, a valve plate in the air inlet cavity is arranged in an end cover and is axially provided with an air inlet hole and a one-way valve plate, a piston ring is arranged between a gland and a piston rod end seat, the gland is axially provided with an air exhaust hole and the one-way valve plate, the piston rod end seat is provided with an air passage, and the lower. The invention has compact structure, small volume, light weight and stable operation of the connecting rod mechanism; the inner and outer chamber structures of the air inlet cavity buffer air inlet and reduce airflow pulsation; the front end of the exhaust port is provided with the hole exhaust pad and the one-way diaphragm, so that the air flow pulsation is reduced, the diaphragm is applied to membrane oxygen generation, and the oxygen concentration of the exhaust port can be stabilized; the buffer pad and the support are embedded in the joint part of the casing and the motor, so that the gravity center is reduced, the space is reduced, and the vibration isolation effect between the vacuum pump and the vibration reduction spring is also realized.

Description

Miniature reciprocating oil-free vacuum pump
Technical Field
The invention relates to the technical field of vacuum pumps, in particular to a miniature reciprocating oil-free vacuum pump.
Background
In the micropump, the requirements are as small as possible, light weight, low power consumption, large flow, low vibration, low noise, and particularly when applied to portable applications. According to the principle, the structure of the pump is optimally designed in the aspects of lowering the overall gravity center of the pump, reducing weight, optimizing the structure, attenuating airflow pulsation of an air inlet channel and an air outlet channel and the like.
Disclosure of Invention
The invention aims to provide a micro reciprocating oil-free vacuum pump.
In order to achieve the purpose, the technical scheme of the invention is that the miniature reciprocating oil-free vacuum pump comprises an air inlet cavity, an air cylinder, a piston rod, a motor and a connecting rod assembly, wherein the air inlet cavity is coaxially and fixedly butted with a port at one side of the air cylinder, and the miniature reciprocating oil-free vacuum pump is characterized in that: the structure of the air cylinder also comprises an exhaust cavity, the exhaust cavity is coaxially butted and fixed with the port at the other side of the air cylinder, a motor power shaft extends into the exhaust cavity, and the motor power shaft is linked with a piston rod through a connecting rod assembly; the air inlet cavity is composed of an end cover, a valve plate and a one-way valve plate, the top of the end cover is provided with an air inlet, the valve plate is axially provided with an air inlet, the axis of the valve plate is provided with the one-way valve plate, the piston is composed of a gland, the one-way valve plate, a piston ring and a piston rod end seat, the piston ring is arranged between the gland and the piston rod end seat, the gland is axially provided with an exhaust hole, the axis of the gland is provided with the one-way valve plate, and; the exhaust cavity is composed of a shell, a top cover, an exhaust cushion with holes, a one-way diaphragm and a plug, the exhaust cushion with holes and the one-way diaphragm are arranged at the lower part of the top cover, an exhaust chamber is formed by the exhaust cushion with holes, the one-way diaphragm and the shell, the other exhaust chamber is formed by the exhaust cushion, the one-way diaphragm and the top cover, and an exhaust port is arranged at the upper part of the top cover.
In the technical scheme, the valve plate of the air inlet cavity body further divides the inner space of the end cover into two communicated outer chambers and inner chambers, the outer chambers are annular chambers, the upper portion of each annular chamber is communicated with an air inlet of the end cover, the lower portion of each annular outer chamber is communicated with the inner chamber through a valve plate air inlet I, the inner chamber is communicated with an axial air inlet hole of the valve plate through a valve plate air inlet II, and a one-way valve plate is arranged at the axis of the valve plate.
In the above technical scheme, the gland is provided with external threads, the piston rod end seat is provided with internal threads, and the gland and the piston rod end seat fix the piston ring in a threaded manner.
In the technical scheme, the casing of motor and the shell of pump are as an organic whole, and the casing of motor is fixed in the damping seat, and this damping seat supports by unable adjustment base damping spring, blotter and constitutes, and the blotter top is hugged closely in exhaust cavity shell bottom, is provided with the blotter support between the blotter outside and the shell, and the blotter below is hugged closely to the damping spring upper end, and the damping spring lower extreme then contradicts with unable adjustment base.
In the technical scheme, one side of the valve plate is provided with an inner protruding ring and an outer protruding ring with notches, the side of the valve plate is arranged in an inner cavity of the end cover to divide the inner cavity of the end cover into two communicated outer chambers and an inner chamber, one end of the cylinder axially abuts against the valve plate and is arranged in the end cover, the other end of the cylinder is axially arranged in the shell body, the end cover and the shell are axially compressed by the fixing screw, the valve plate and the cylinder are fixed between the end cover and the shell, and the valve plate and the cylinder are both provided with sealing rings in the radial direction.
The invention has the advantages that 1, the whole machine has compact structure, small volume and light weight, the axial size of the motor power shaft and the link mechanism is small, the deflection of the motor power shaft during the rotating work is reduced, and the link mechanism runs stably; 2. the air inlet cavity adopts a shunting convolution outer cavity I and an air inlet inner cavity II as large as possible, so that air inlet buffering is increased, and airflow pulsation in the suction process of the vacuum pump is reduced; 3. the gland in the piston assembly is fixed with the piston rod end seat in a threaded mode, so that air leakage of a screw hole in a screw fixing mode is prevented, the thickness of the piston rod end seat is reduced, and the interference of piston movement and a machine shell is avoided in a compact structure; 4. the structure of the exhaust pad at the front end of the exhaust port, namely the multi-air passage and the one-way diaphragm, is additionally provided with an exhaust chamber, so that the pulsation of the exhaust air flow can be attenuated again, and the exhaust oxygen concentration can be stabilized in the membrane oxygen production under the low-pressure environment of the plateau; 5. the buffer pad and the support are embedded in the joint part of the casing and the motor, so that the gravity center is reduced, the space is reduced, and the vibration isolation between the vacuum pump and the vibration reduction spring is effectively realized. 6. The valve plate is arranged in the end cover, so that the end cover, the valve plate and the cylinder are axially compact in structural design, and the axial size of the vacuum pump is further reduced. The valve plate and the cylinder are radially provided with the O-shaped sealing rings, end face sealing between the valve plate and the end cover, end face sealing between the cylinder and the end cover, and end face sealing between the cylinder and the shell are cancelled, the axial size of the pump is shortened, the assembly difficulty is reduced, and the assembly efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is an enlarged schematic view of a portion i of the piston assembly of fig. 1.
3 fig. 33 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 31 3. 3
Fig. 4 is a cross-sectional view of B-B of fig. 1.
FIG. 5 is an enlarged schematic view of a portion II of the end cap and valve plate of FIG. 1.
In the above drawings, 1 is a motor, 2 is a damping spring, 3 is a cushion support, 4 is a cushion, 5 is a plug, 6 is a screw, 7 is an upper cover, 8 is an exhaust pad, 9 is a diaphragm, 10 is an exhaust port, 11 is a second exhaust chamber, 12 is a housing, 13 is a cylinder, 14 is an air inlet of an end cover, 15 is a valve plate, 16 is a one-way valve plate, 17 is an air inlet chamber, 18 is a fixing screw, 19 is a first exhaust chamber, 21 is a one-way valve plate, 22 is a gland exhaust hole, 23 is a chamber, 24 is an air channel, 25 is a gland, 26 is a piston ring, 27 is a piston rod end seat, 31 is an end cover air inlet, 32 is an air inlet outer chamber, 33 is a valve plate, 34 is a valve plate radial air inlet, 35 is an air inlet inner chamber, and 36 is a valve plate radial; 37 is a valve plate axial inlet hole, 38 is a notched outer projecting ring, 39 is a notched inner projecting ring, 41 is a lateral mounting hole i, 42 is a cushion support hole i, 43 is a cushion support hole ii, 44 is a cushion support hole iii, 45 is a lateral mounting hole ii, 46 is a fixing screw, 47 is an end cover, 48 is a seal ring, 49 is a seal ring, 50 is a valve plate, and 51 is a cylinder.
Detailed Description
First embodiment, the structure of this embodiment is shown in fig. 1.
In this embodiment, the same axis of air inlet cavity, cylinder cavity, exhaust cavity sets up in series, has taken sealing measure and fixed as a whole between each cavity, has both reduced the volume and the weight of vacuum pump, and the exhaust cavity designs into two exhaust chambers and spacious relatively, compares with traditional exhaust duct, more can attenuate from cylinder cavity exhaust compressed gas pulsation kinetic energy to reduce the pulsation air flow noise.
In this embodiment, referring to fig. 1, the air inlet cavity is enclosed by an end cover 14, a valve plate 15 and a one-way valve plate 16, the cylinder cavity is enclosed by a cylinder 13 and a piston 19, the reciprocating motion of the piston can change the volume of the cylinder cavity, the exhaust cavity is enclosed by a shell 3, a plug 5, a top cover 7, an exhaust pad 8 and a one-way diaphragm into two exhaust chambers, one exhaust chamber is enclosed between the exhaust pad 8 and the one-way diaphragm 9 and the shell 3, and the other exhaust chamber is enclosed between the exhaust pad 8 and the one-way diaphragm 9 and the top cover 7. The valve plate 15 in the air inlet cavity is axially provided with an air inlet and is provided with a one-way valve plate 16, the piston assembly gland 25 which reciprocates in the cylinder cavity is axially provided with an air outlet 22 and is provided with a one-way valve plate 21 (see figure 2), and the air exhaust pad 8 in the air exhaust cavity is provided with an air outlet and is provided with a one-way diaphragm 9. The one-way valve plate 16 only allows gas to enter the cylinder cavity from the gas inlet cavity, the one-way valve plate 21 only allows gas in the cylinder cavity to enter the gas outlet cavity, and the one-way diaphragm 9 only allows gas in the gas outlet cavity to enter the second gas outlet cavity 11 from the first gas outlet cavity 19 and then to be discharged through the gas outlet 10.
In this embodiment, the piston assembly 19 is shown in enlarged detail in fig. 2, the outer edge of the gland 25 is provided with an external thread, the inner edge of the rod end seat 27 is provided with an internal thread, and the gland and the rod end seat clamp and fix the piston ring 26 in a threaded manner. Effectively preventing the blow-by phenomenon of the screw hole when adopting a screw fixing mode. A chamber 23 is formed between the gland 25 and the piston rod end seat 27, and gas exhausted from the cylinder cavity firstly passes through the chamber 23, then enters the first exhaust chamber 19 of the exhaust chamber through the air passage 24, and then enters the second exhaust chamber 11 through the exhaust hole of the exhaust cushion 8 and the one-way diaphragm 9 to be exhausted, so that the pulsation of the exhausted gas flow is attenuated.
In this embodiment, referring to fig. 3, one side of the valve plate is provided with an outer protruding ring 38 and an inner protruding ring 39 with a notch, the inner protruding ring of the valve plate 33 of the air inlet cavity divides the inner space of the end cover into two communicating air inlet outer chamber 32 and air inlet inner chamber 35, the outer chamber 32 is annular, the upper part of the annular chamber is communicated with the air inlet 31 of the end cover, the air inlet is divided into two paths from the inlet, the lower part of the annular chamber enters the inner chamber 35 through the radial air inlet 36 of the valve plate, and the air inlet enters the vicinity of the axial air inlet 37 of the valve plate through the radial air inlet 34 of the valve plate. Under the control of the one-way valve plate at the axis of the valve plate, the gas entering the air inlet cavity continuously enters the cylinder cavity. The air inlet cavity adopts a shunting convolution outer cavity and an air inlet inner cavity as large as possible, so that air inlet buffering is increased, and air flow pulsation in the suction process of the vacuum pump is reduced.
In this embodiment, referring to fig. 1, the protruding ring side of the valve plate 15 is inserted into the inner cavity of the end cover 14, one end of the cylinder 13 axially abuts against the valve plate 15 and is inserted into the end cover 14, the other end of the cylinder 13 is axially inserted into the housing 12, and the fixing screw 18 axially tightens the end cover 14 and the housing 12, so that the valve plate 15 and the cylinder 13 are fixed between the end cover 14 and the housing 12. Referring to fig. 5, an O-ring 48 is disposed between the end cover 47 and the valve plate 50, an O-ring 49 is disposed between the end cover 47 and the cylinder 51, and an O-ring is also disposed between the housing and the cylinder. The sealing rings arranged in the radial direction improve the sealing effect and reduce the assembling difficulty. The axial dimension of the pump is effectively shortened.
In this embodiment, the exhaust pad 8 and the silica gel diaphragm 9 are disposed at the front end of the exhaust port 10, so that the exhaust airflow entering the first exhaust chamber 19 must first pass through a plurality of exhaust holes of the exhaust pad 8 to break away the silica gel diaphragm 9, enter the second exhaust chamber 11, and then be exhausted through the exhaust port 10, thereby reducing pulsation of the exhaust airflow. When the piston moves to the left, the silicone diaphragm 9 closes, preventing the backflow of the air flow. Practice proves that the structure is used for portable membrane oxygen generation, and is beneficial to stabilizing the outlet oxygen concentration in plateau.
In the embodiment, the connecting rod mechanism connecting the piston rod and the power shaft of the motor is arranged in the exhaust cavity, and the connecting rod is close to the end of the motor as far as possible, so that the structure of the whole machine is compact, and the volume is reduced. Meanwhile, the overlarge deflection caused by the longer motor shaft is avoided, so that the link mechanism runs stably.
In this embodiment, referring to fig. 1, the housing of the motor is made integral with the housing of the pump for compactness. In order to reduce the mechanical vibrations of the vacuum pump, in addition to the damping spring 2 arranged below the housing 12, a cushion pad 4 and a cushion pad support 3 are embedded at the bottom of the housing 12. Shell 12 is fixed in the damping seat, and this damping seat supports 3 by unable adjustment base, damping spring 2, blotter 4 and blotter and constitutes, and the blotter top is hugged closely in exhaust cavity shell 12 bottom, is provided with the blotter between 4 outsides of blotter and the shell and supports 3, and 4 below blotters are hugged closely to 2 upper ends of damping spring, and 2 lower extremes of damping spring then contradict with unable adjustment base. Referring to fig. 4, the cushion supports are shown at 42, 43, 44. The structure design not only reduces the gravity center and the space, but also effectively plays a role in vibration isolation between the vacuum pump and the vibration reduction spring.
The portable oxygen enrichment device is installed and fixed in a portable oxygen enrichment device shell, an end cover air inlet 14 is communicated with an oxygen enrichment membrane assembly through a corrugated pipe, and an air outlet 10 is communicated with an oxygen enrichment gas output end through the corrugated pipe. Under the drive of the motor and the connecting rod mechanism, the piston reciprocates left and right in the cylinder cavity, and the formed negative pressure vacuum degree can enable external normal pressure air to pass through the oxygen-enriched membrane component, enter the air inlet cavity, the cylinder cavity and the exhaust cavity in sequence and finally be output from the exhaust port 10.

Claims (5)

1. The utility model provides a miniature reciprocal oilless vacuum pump, its constitution is including admitting air cavity, cylinder, piston and piston rod, motor and link assembly, and the cavity of admitting air is fixed its characterized in that with cylinder one side port coaxial butt joint: the structure of the air cylinder also comprises an exhaust cavity, the exhaust cavity is coaxially butted and fixed with the port at the other side of the air cylinder, a motor power shaft extends into the exhaust cavity, and the motor power shaft is linked with a piston rod through a connecting rod assembly; the air inlet cavity is composed of an end cover, a valve plate and a one-way valve plate, the top of the end cover is provided with an air inlet, the valve plate is axially provided with an air inlet, the axis of the valve plate is provided with the one-way valve plate, the piston is composed of a gland, the one-way valve plate, a piston ring and a piston rod end seat, the piston ring is arranged between the gland and the piston rod end seat, the gland is axially provided with an exhaust hole, the axis of the gland is provided with the one-way valve plate, and; the exhaust cavity is composed of a shell, a top cover, an exhaust cushion with holes, a one-way diaphragm and a plug, the exhaust cushion with holes and the one-way diaphragm are arranged at the lower part of the top cover, an exhaust chamber is formed by the exhaust cushion with holes, the one-way diaphragm and the shell, the other exhaust chamber is formed by the exhaust cushion, the one-way diaphragm and the top cover, and an exhaust port is arranged at the upper part of the top cover.
2. A micro reciprocating oil-free vacuum pump according to claim 1, characterized in that: the valve plate of the air inlet cavity body further divides the inner space of the end cover into two communicated outer chambers and inner chambers, the outer chambers are annular chambers, the upper portion of each annular chamber is communicated with an air inlet of the end cover, the lower portion of each annular outer chamber is communicated with the inner chamber through a valve plate air inlet I, the inner chamber is communicated with an axial air inlet of the valve plate through a valve plate air inlet II, and a one-way valve plate is arranged at the axis of the valve plate.
3. A micro reciprocating oil-free vacuum pump according to claim 1, characterized in that: the gland is provided with external screw thread, the piston rod end seat is provided with internal screw thread, gland and piston rod end seat with the screw thread mode and with piston ring fixed wherein.
4. A micro reciprocating oil-free vacuum pump according to claim 1, characterized in that: the casing of motor and the shell of pump are as an organic whole, and the casing of motor is fixed in the damping seat, and this damping seat supports by unable adjustment base damping spring, blotter and constitutes, and the blotter top is hugged closely in exhaust cavity shell bottom, is provided with the blotter between the blotter outside and the shell and supports, and the blotter below is hugged closely to the damping spring upper end, and the damping spring lower extreme then contradicts with unable adjustment base.
5. A micro reciprocating oil-free vacuum pump according to claim 1, characterized in that: one side of valve plate sets up the inside and outside two rings of jutting that have the breach, and the inside cavity of end cover is packed into to this side of valve plate, separates the inside cavity of end cover for two communicating outer cavities and inner chamber, and the one end axial of cylinder is contradicted the valve plate and is packed into the end cover, and the other end of cylinder is then packed into the shell body axially, and set screw is taut with shell axial with the end cover, makes valve plate and cylinder be fixed in between end cover and the shell, and valve plate and cylinder all are provided with the sealing washer radially.
CN201811381854.3A 2018-11-20 2018-11-20 Miniature reciprocating oil-free vacuum pump Pending CN111197568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811381854.3A CN111197568A (en) 2018-11-20 2018-11-20 Miniature reciprocating oil-free vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811381854.3A CN111197568A (en) 2018-11-20 2018-11-20 Miniature reciprocating oil-free vacuum pump

Publications (1)

Publication Number Publication Date
CN111197568A true CN111197568A (en) 2020-05-26

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ID=70744170

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Application Number Title Priority Date Filing Date
CN201811381854.3A Pending CN111197568A (en) 2018-11-20 2018-11-20 Miniature reciprocating oil-free vacuum pump

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CN (1) CN111197568A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2117473U (en) * 1992-02-25 1992-09-30 刘国全 Labyrinth silencer
JP2006233869A (en) * 2005-02-24 2006-09-07 Ngk Spark Plug Co Ltd Oxygen concentrator and compressor
CN101903658A (en) * 2007-12-21 2010-12-01 丹佛斯商业压缩机公司 Cylinder head for piston refrigeration compressor, compression unit including such cylinder head, and piston refrigeration compressor including said compression unit
JP2013256937A (en) * 2012-05-18 2013-12-26 Aisin Seiki Co Ltd Vacuum pump
CN203515995U (en) * 2013-04-23 2014-04-02 上海旭岛汽车零部件有限公司 Double swing spherical surface piston type electric vacuum pump
CN205117664U (en) * 2015-11-15 2016-03-30 杭州华意汽配有限公司 Improvement type compression cylinder base
CN206582088U (en) * 2017-03-31 2017-10-24 徐瑞祥 Strengthen closed type straight line opposed piston electric vacuum pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2117473U (en) * 1992-02-25 1992-09-30 刘国全 Labyrinth silencer
JP2006233869A (en) * 2005-02-24 2006-09-07 Ngk Spark Plug Co Ltd Oxygen concentrator and compressor
CN101903658A (en) * 2007-12-21 2010-12-01 丹佛斯商业压缩机公司 Cylinder head for piston refrigeration compressor, compression unit including such cylinder head, and piston refrigeration compressor including said compression unit
JP2013256937A (en) * 2012-05-18 2013-12-26 Aisin Seiki Co Ltd Vacuum pump
CN203515995U (en) * 2013-04-23 2014-04-02 上海旭岛汽车零部件有限公司 Double swing spherical surface piston type electric vacuum pump
CN205117664U (en) * 2015-11-15 2016-03-30 杭州华意汽配有限公司 Improvement type compression cylinder base
CN206582088U (en) * 2017-03-31 2017-10-24 徐瑞祥 Strengthen closed type straight line opposed piston electric vacuum pump

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Application publication date: 20200526