CN112128106A - Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine - Google Patents

Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine Download PDF

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Publication number
CN112128106A
CN112128106A CN202011111112.6A CN202011111112A CN112128106A CN 112128106 A CN112128106 A CN 112128106A CN 202011111112 A CN202011111112 A CN 202011111112A CN 112128106 A CN112128106 A CN 112128106A
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CN
China
Prior art keywords
vacuum pump
sinking groove
gear
rotor
groove
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Pending
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CN202011111112.6A
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Chinese (zh)
Inventor
林喜彬
佟晨光
林廉升
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Individual
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Individual
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Priority to CN202011111112.6A priority Critical patent/CN112128106A/en
Publication of CN112128106A publication Critical patent/CN112128106A/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
    • 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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • 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
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention discloses an oil gas recovery vacuum pump and an oiling machine with a rotary valve for switching the flow direction of air flow, wherein the vacuum pump comprises a power unit, an air distribution disc, a cover plate, a switching valve, a stator, a rotor and the like which are matched, so that the switching of the flow direction of the air flow can be realized by the switching valve even under the condition that the rotation direction of a motor is not known, the structure of the scheme can be suitable for motors with different steering directions, the motor does not need to be customized in advance, and the use is flexible and reliable.

Description

Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine
Technical Field
The invention belongs to the field of oil gas recovery vacuum pumps, and particularly relates to an oil gas recovery vacuum pump with a rotary valve for switching the flow direction of air flow and an oiling machine.
Background
The oil gas recovery technology of the oiling machine is an energy-saving and environment-friendly new technology, oil gas discharged by oil products in the processes of storage, transportation, loading and unloading is recovered by using the oil gas recovery technology, air pollution caused by oil gas volatilization is prevented, potential safety hazards are eliminated, and the main idea is to reduce economic loss by improving the utilization rate of energy sources, so that considerable benefit return is obtained.
However, the oil gas recovery vacuum pump structure among the prior art is one-way, when oil gas recovery vacuum pump and motor dress were reversed, the motor turned to and predetermines when opposite promptly, can lead to the oil gas to flow backward, can damage oil gas vacuum pump itself and other relevant equipment, and the supporting subassembly of current most vacuum pumps is many can't turn to the condition according to the motor and carry out temporary adjustment, the finished piece is decided promptly, so, this also makes when the vacuum pump assembly, is difficult to carry out instant adaptation to the condition of old motor.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the oil gas recovery vacuum pump and the oiling machine which are flexible to use and reliable and can switch the airflow direction by a rotary valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a rotary valve switches gas flow to's vapor recovery vacuum pump, connects in the tanker aircraft and is used for providing the required negative pressure of tanker aircraft recovery vapor, and it includes:
the power unit is used for generating a power source of negative pressure required by oil gas recovery of the oiling machine;
the gas distribution plate is fixedly provided with a first joint and a second joint at two sides respectively, a first sinking groove and a second sinking groove are formed in the lower end face of the gas distribution plate, a circular concave cavity is formed in the center of the upper end face of the gas distribution plate, a first through hole and a second through hole which are oppositely arranged are formed in the inner wall of the concave cavity, the first through hole is communicated with the first sinking groove, the second through hole is communicated with the second sinking groove, a first flow groove and a second flow groove are formed in the upper end face of the gas distribution plate, one ends of the first flow groove and one end of the second flow groove are oppositely arranged and respectively extend to the inner wall of the concave cavity, the other end of the first flow groove extends to the first joint, and the other end of the second flow groove extends to the second joint;
the cover plate is covered on the upper end surface of the gas distribution plate and covers the first runner and the second runner;
the conversion valve is matched with the shape of the concave cavity and is rotationally connected in the concave cavity, a first channel and a second channel are arranged in the conversion valve, and two ports of the first channel and the second channel respectively extend to the side wall of the conversion valve;
the stator is of a cylindrical structure, one end of the stator is fixed on the lower end face of the gas distribution plate and surrounds the first sinking groove and the second sinking groove, and the other end of the stator is fixed on the upper end face of the power unit;
the rotor is eccentrically and rotatably connected inside the stator and driven to rotate by the power unit, the upper end surface of the rotor is abutted against the lower end surface of the gas distribution disc, the lower end surface of the rotor is abutted against the upper end surface of the power unit, a plurality of sliding grooves are formed in the periphery of the rotor at intervals along the circumferential direction, and push plates are respectively connected in the sliding grooves in a sliding manner; in the process that the power unit drives the rotor to rotate eccentrically, the push plate extends out under the action of centrifugal force and abuts against the inner wall of the stator, so that air in the first sinking groove is pushed into the second sinking groove, or air in the second sinking groove is pushed into the first sinking groove.
As a preferred embodiment, the power unit includes a motor and a speed reducer, the speed reducer includes a bracket cover, a bottom plate and a gear reduction mechanism, the bottom is fixedly connected to the upper end face of the motor, the lower end of the bracket cover is fixedly connected to the upper end of the bottom plate, the upper end of the bracket cover is fixed to the lower end of the stator, the gear reduction mechanism is disposed in a space enclosed by the bracket cover and the bottom plate, and an output shaft of the motor drives the rotor to rotate through the gear reduction mechanism.
Furthermore, the gear reduction mechanism comprises an input gear, a transition duplicate gear and an output gear, the input gear is fixedly connected to an output shaft of the motor, a lower gear of the transition duplicate gear is meshed with the input gear, an upper gear of the transition duplicate gear is meshed with the output gear, and the output gear is fixedly connected to a rotating shaft of the rotor.
As a preferred embodiment, a rotating block is fixed on the upper end face of the switching valve, two limiting blocks arranged at intervals are fixed on the cover plate, and the rotating block moves between the two limiting blocks.
In a preferred embodiment, the end of the push plate far away from the center of the rotor is of an arc structure.
In a preferred embodiment, the first sinking groove and the second sinking groove are communicated through a pressure relief valve.
In a preferred embodiment, flame arresters are connected to the first joint and the second joint respectively.
An oiling machine comprises the oil gas recovery vacuum pump.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: through power unit drive rotor eccentric rotation, the push pedal receives centrifugal force and stretches out and offsets with the inner wall of stator, make the air in the first heavy inslot pushed to the heavy inslot of second (first heavy inslot produced the negative pressure this moment, and the heavy groove of second produces the malleation), or make the air in the heavy inslot of second pushed to the heavy inslot of first (first heavy inslot produced the malleation this moment, and the heavy groove of second produces the negative pressure), realize simultaneously that the air current from first joint output or from the second joint output in the cooperation of air distribution plate and change-over valve, even under the condition of not knowing motor direction of rotation, can realize the switching of air current flow direction through will change-over valve, make the structure of this scheme can be applicable to the motor of different directions of turning to and need not customization in advance, it is nimble reliable to use.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a cross-sectional view of the gas panel, transition valve and cover plate assembly together;
FIG. 4 is a top view of the gas panel, switching valve and cover plate assembled together;
FIG. 5 is a schematic view of a gas panel;
FIG. 6 is a schematic view of another view of the distributor plate
FIG. 7 is a schematic view of a gear reduction mechanism;
FIG. 8 is a schematic view of the rotor in cooperation with the stator;
FIG. 9 is a horizontal cross-sectional view of the switching valve and gas panel assembly together in an initial state;
FIG. 10 is a horizontal cross-sectional view of the switching valve and gas panel assembly together and rotationally switched for the switching valve;
fig. 11 is a schematic diagram of adding a pressure relief valve on the gas panel.
Detailed Description
As shown in one of fig. 1 to 10, the present invention relates to an oil gas recovery vacuum pump with a rotary valve for switching the flow direction of air flow, which is connected in a refueling machine and used for providing negative pressure required by oil gas recovery of the refueling machine, and specifically comprises:
the power unit 1 is used for generating a power source of negative pressure required by oil gas recovery of the oiling machine;
the gas distribution plate comprises a gas distribution plate 2, wherein a first joint 3 and a second joint 4 are respectively fixed on two sides of the gas distribution plate 2, a first sinking groove 21 and a second sinking groove 22 are formed in the lower end face of the gas distribution plate 2, a circular concave cavity 23 is formed in the center of the upper end face of the gas distribution plate 2, a first through hole 24 and a second through hole 25 which are oppositely arranged are formed in the inner wall of the concave cavity 23, the first through hole 24 is communicated with the first sinking groove 21, the second through hole 25 is communicated with the second sinking groove 22, a first flow groove 26 and a second flow groove 27 which are symmetrically arranged are formed in the upper end face of the gas distribution plate 2, one ends of the first flow groove 26 and the second flow groove 27 are oppositely arranged and respectively extend to be communicated to the inner wall of the concave cavity 23, the other end of the first flow groove 26 extends to be communicated to the first joint 3, and the other end of the second;
a cover plate 4 covering the first flow groove 26 and the second flow groove 27 and provided on the upper end surface of the gas distribution plate 2;
the conversion valve 5 is matched with the shape of the cavity 23 and is rotatably connected in the cavity 23, a first channel 51 and a second channel 52 are arranged in the conversion valve 5 (the first channel 51 and the second channel 52 are in central symmetry), and two ports of the first channel 51 and the second channel 52 respectively extend to the side wall of the conversion valve 5;
the stator 6 is of a cylindrical structure, one end of the stator is fixed on the lower end face of the gas distribution plate 2 and surrounds the first sinking groove 21 and the second sinking groove 22, and the other end of the stator is fixed on the upper end face of the power unit 1;
the rotor 7 is eccentrically and rotatably connected inside the stator 6 and driven to rotate by the power unit 1, the upper end face of the rotor 7 is abutted against the lower end face of the gas distribution disc 2, the lower end face of the rotor 7 is abutted against the upper end face of the power unit 1, a plurality of sliding grooves are formed in the periphery of the rotor 7 at intervals along the circumferential direction, and push plates 8 are respectively connected in the sliding grooves in a sliding manner; in the process that the power unit 1 drives the rotor 7 to rotate eccentrically, the push plate 8 extends out under the action of centrifugal force and abuts against the inner wall of the stator 6, so that air in the first sinking groove 21 is pushed into the second sinking groove 22, or air in the second sinking groove 22 is pushed into the first sinking groove 21.
As an implementation manner of the power unit 1, in this embodiment, the power unit 1 includes a motor 11 and a speed reducer 12, the speed reducer 12 includes a bracket cover 121, a bottom plate 122 and a gear reduction mechanism 123, the bottom of the speed reducer is fixedly connected to an upper end surface of the motor 11, a lower end of the bracket cover 121 is fixedly connected to an upper end of the bottom plate 122, an upper end of the bracket cover 121 is fixed to a lower end of the stator 6, the gear reduction mechanism 123 is disposed in a space enclosed by the bracket cover 121 and the bottom plate 122, and an output shaft of the motor 11 drives the rotor 7 to rotate through the gear reduction mechanism 123. The gear reduction mechanism 123 includes an input gear 1231, a transition dual gear 1232, and an output gear 1233, the input gear 1231 is fixedly connected to the output shaft of the motor 11, a lower gear of the transition dual gear 1232 is engaged with the input gear 1231, an upper gear of the transition dual gear 1232 is engaged with the output gear 1233, and the output gear 1233 is fixedly connected to the rotating shaft of the rotor 7.
In order to facilitate the switching from the rotary switching valve 5 to a preset position, a rotating block 8 is fixed on the upper end surface of the switching valve 5, two limiting blocks 9 arranged at intervals are fixed on the cover plate 4, the rotating block 8 moves between the two limiting blocks 9, and when the rotating block 8 touches different limiting blocks 9, the switching of the air flow direction can be realized.
In order to ensure the air tightness, the end part of the push plate 8 far away from the center of the rotor 7 is of an arc structure, so that the push plate 8 can be ensured to keep dynamic sealing with the inner wall of the stator 6 in the rotating process.
In the actual use process, in order to ensure safety, flame arresters are arranged on the first connector 3 and the second connector 4.
In order to improve the sealing performance of the entire vacuum pump, a seal 33 such as a gasket or an oil seal may be added to a place where leakage is likely to occur.
The working principle of the invention is as follows:
taking the state of fig. 9 as an initial state (at this time, two ports of the first channel 51 are respectively communicated with the first through hole 24 and the first runner 26, and two ports of the second channel 52 are respectively communicated with the second through hole 25 and the second runner 27), the motor 11 drives the rotor 7 to eccentrically rotate through the speed reducer 12, the push plate 8 extends out by centrifugal force and abuts against the inner wall of the stator 6, so that the air in the first sinking groove 21 is pushed into the second sinking groove 22 (at this time, the first sinking groove 21 generates negative pressure to suck air, and the second sinking groove 22 generates positive pressure to exhaust air), thereby making the flow direction of the air flow inside the vacuum pump be: the first joint 3 → the first runner 26 → the first channel 51 → the first through hole 24 → the first sinker 21 → the second sinker 22 → the second through hole 25 → the second channel 52 → the second runner 27 → the second joint 4. In addition, as shown in fig. 11, the relief valve 28 has a function that when the second sinking groove 22 is isolated from the first sinking groove 21, the gas in the first sinking groove 21 starts to be compressed, the volume gradually decreases, when the compressed gas exceeds the threshold value of the relief valve, the relief valve is pushed open by the compressed gas, and the gas passing part is sent back to the second sinking groove 22, so as to avoid deformation or other bad operation conditions caused by excessive pressure inside the stator.
When the flow direction of the gas flow is to be changed, as shown in fig. 10, the switching valve 5 is rotated by 90 ° so that the two ports of the first passage 51 are respectively switched to be communicated with the first flow groove 26 and the second through hole 25, and the two ports of the second passage 52 are respectively switched to be communicated with the second flow groove 27 and the first through hole 24, and at this time, the flow direction of the gas flow inside the vacuum pump is changed: the second joint 4 → the second runner 27 → the second channel 52 → the first through hole 24 → the first sink 21 → the second sink 22 → the second through hole 25 → the first channel 51 → the first runner 26 → the first joint 3.
If the motor 11 rotates in the opposite direction, the direction of the airflow is just opposite to that described above, and the detailed description is omitted.
The invention relies on the innovative air passage structure in the air distribution disc 2 and the conversion valve, thereby realizing that the switching of the air flow direction can be realized by the conversion valve 5 even under the condition of not knowing the rotation direction of the motor 11, so that the structure of the scheme can be suitable for motors 11 with different steering directions without being customized in advance, and the use is flexible and reliable.
While the invention has been described in connection with the above embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, which are illustrative and not restrictive, and that those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (8)

1. The utility model provides a rotary valve switches vapor recovery system vacuum pump of air current flow direction, connects in the tanker aircraft and is used for providing the required negative pressure of tanker aircraft recovery oil gas, its characterized in that: it includes:
the power unit is used for generating a power source of negative pressure required by oil gas recovery of the oiling machine;
the gas distribution plate is fixedly provided with a first joint and a second joint at two sides respectively, a first sinking groove and a second sinking groove are formed in the lower end face of the gas distribution plate, a circular concave cavity is formed in the center of the upper end face of the gas distribution plate, a first through hole and a second through hole which are oppositely arranged are formed in the inner wall of the concave cavity, the first through hole is communicated with the first sinking groove, the second through hole is communicated with the second sinking groove, a first flow groove and a second flow groove are formed in the upper end face of the gas distribution plate, one ends of the first flow groove and one end of the second flow groove are oppositely arranged and respectively extend to the inner wall of the concave cavity, the other end of the first flow groove extends to the first joint, and the other end of the second flow groove extends to the second joint;
the cover plate is covered on the upper end surface of the gas distribution plate and covers the first runner and the second runner;
the conversion valve is matched with the shape of the concave cavity and is rotationally connected in the concave cavity, a first channel and a second channel are arranged in the conversion valve, and two ports of the first channel and the second channel respectively extend to the side wall of the conversion valve;
the stator is of a cylindrical structure, one end of the stator is fixed on the lower end face of the gas distribution plate and surrounds the first sinking groove and the second sinking groove, and the other end of the stator is fixed on the upper end face of the power unit;
the rotor is eccentrically and rotatably connected inside the stator and driven to rotate by the power unit, the upper end surface of the rotor is abutted against the lower end surface of the gas distribution disc, the lower end surface of the rotor is abutted against the upper end surface of the power unit, a plurality of sliding grooves are formed in the periphery of the rotor at intervals along the circumferential direction, and push plates are respectively connected in the sliding grooves in a sliding manner; in the process that the power unit drives the rotor to rotate eccentrically, the push plate extends out under the action of centrifugal force and abuts against the inner wall of the stator, so that air in the first sinking groove is pushed into the second sinking groove, or air in the second sinking groove is pushed into the first sinking groove.
2. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow according to claim 1, wherein: the power unit comprises a motor and a speed reducer, the speed reducer comprises a support cover, a bottom plate and a gear reduction mechanism, the bottom of the speed reducer is fixedly connected to the upper end face of the motor, the lower end of the support cover is fixedly connected to the upper end of the bottom plate, the upper end of the support cover is fixed to the lower end of the stator, the gear reduction mechanism is arranged in a space enclosed by the support cover and the bottom plate, and an output shaft of the motor drives the rotor to rotate through the gear reduction mechanism.
3. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow as claimed in claim 2, wherein: the gear reduction mechanism comprises an input gear, a transition duplicate gear and an output gear, the input gear is fixedly connected to an output shaft of the motor, a lower gear of the transition duplicate gear is meshed with the input gear, an upper gear of the transition duplicate gear is meshed with the output gear, and the output gear is fixedly connected to a rotating shaft of the rotor.
4. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow according to claim 1, wherein: the upper end face of the conversion valve is fixedly provided with a rotating block, the cover plate is fixedly provided with two limiting blocks arranged at intervals, and the rotating block moves between the two limiting blocks.
5. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow according to claim 1, wherein: the end part of the push plate far away from the center of the rotor is of an arc-shaped structure.
6. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow according to claim 1, wherein: the first sinking groove and the second sinking groove are communicated through a pressure relief valve.
7. The oil and gas recovery vacuum pump with a rotary valve for switching the flow direction of the air flow according to claim 1, wherein: and flame arresters are respectively connected to the first joint and the second joint.
8. An oiling machine is characterized in that: comprising an oil and gas recovery vacuum pump according to any of claims 1 to 7.
CN202011111112.6A 2020-10-16 2020-10-16 Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine Pending CN112128106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011111112.6A CN112128106A (en) 2020-10-16 2020-10-16 Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011111112.6A CN112128106A (en) 2020-10-16 2020-10-16 Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine

Publications (1)

Publication Number Publication Date
CN112128106A true CN112128106A (en) 2020-12-25

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ID=73854141

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011111112.6A Pending CN112128106A (en) 2020-10-16 2020-10-16 Oil gas recovery vacuum pump with rotary valve for switching airflow direction and oiling machine

Country Status (1)

Country Link
CN (1) CN112128106A (en)

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