CN221169994U

CN221169994U - Oil gas recovery pump

Info

Publication number: CN221169994U
Application number: CN202322618224.6U
Authority: CN
Inventors: 朱玲科; 潘敏建; 朱哲明; 朱络兵; 张军; 郑国永
Original assignee: Sinopec Sales Co ltd; China Petroleum and Chemical Corp; Sinopec Sales Co Ltd Zhejiang Petroleum Branch
Current assignee: Sinopec Sales Co ltd; China Petroleum and Chemical Corp; Sinopec Sales Co Ltd Zhejiang Petroleum Branch
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-06-18
Anticipated expiration: 2033-09-25

Abstract

The embodiment of the application discloses an oil gas recovery pump, which comprises a vacuum pump and a motor, wherein the vacuum pump comprises a flower wheel, a pump main shaft and a pump seat, one end of the pump main shaft is inserted into a central hole of the flower wheel and is connected with a flower wheel key, the other end of the pump main shaft is rotatably arranged on the pump seat through a bearing assembly, and the top end of the flower wheel is connected with the pump main shaft through a bolt. In this scheme through key and bolt with flower wheel fixed mounting on the pump main shaft, specifically, pump main shaft and flower wheel key-type connection to carry out circumference location to the flower wheel, prevent the circumferential motion of flower wheel along the pump main shaft, pump main shaft and flower wheel pass through bolted connection, in order to carry out axial location to the flower wheel, in order to prevent that the flower wheel from moving in the axis direction of pump main shaft. The spline wheel is circumferentially and axially positioned, so that friction between the spline wheel and the upper wear-resisting piece and between the spline wheel and the lower wear-resisting piece is reduced, the running stability of the vacuum pump is improved, and the service life of the vacuum pump is prolonged.

Description

Oil gas recovery pump

Technical Field

The application relates to the technical field of oil gas recovery, in particular to an oil gas recovery pump.

Background

Light oil in petroleum machine products, especially gasoline, is extremely volatile. In the process of oiling an automobile by using an oiling machine, a large amount of oil gas is inevitably volatilized, and the volatilized oil gas can cause environmental pollution, fire hazard, personal safety hazard, resource waste and the like. Petroleum is a non-renewable energy source, and it is imperative to perform airtight recovery on oil gas.

The recovery of the oil gas of the oiling machine is usually to install an oil gas recovery pump in the oiling machine, the air inlet end of the oil gas recovery pump is communicated with an oil gas recovery type oiling gun, and the air outlet end of the oil gas recovery pump is connected with an oil storage tank through an oil gas recovery pipeline.

The spline of the vacuum pump of the existing oil gas recovery pump is not fixed in the axial direction of the pump main shaft, the spline can deviate along the axial direction of the pump main shaft during rotation, friction between the spline and the upper wear pad and between the spline and the lower wear pad are caused, and long-time operation can influence the operation stability of the vacuum pump and shorten the service life of the vacuum pump.

Therefore, how to prevent the spline from moving on the pump spindle along the axial direction, so as to improve the running stability of the vacuum pump and prolong the service life of the vacuum pump, is a technical problem to be solved urgently by those skilled in the art.

Disclosure of utility model

The application provides an oil gas recovery pump, which is used for preventing a spline from moving on a main shaft of the pump along the axial direction, improving the running stability of a vacuum pump and prolonging the service life of the vacuum pump.

In order to achieve the above object, the present application provides an oil gas recovery pump comprising a vacuum pump and a motor, the vacuum pump comprising a spline wheel, a pump main shaft and a pump seat,

One end of the pump main shaft is inserted into the central hole of the spline and is connected with the spline, the other end of the pump main shaft is rotationally connected with the pump seat through a bearing assembly, and the top end of the spline is connected with the pump main shaft through a bolt.

Preferably, in the oil gas recovery pump, the bearing assembly comprises a first bearing, a bearing spacer and a second bearing which are sequentially sleeved on the main shaft of the pump, and the bearing assembly is pressed on the pump seat through a bearing gland.

Preferably, in the oil gas recovery pump, a double-lip oil seal is arranged between the pump main shaft and the pump seat.

Preferably, in the above oil gas recovery pump, the vacuum pump is connected with the motor through a coupling,

The coupling is sleeved with a hollow support, one end of the hollow support is connected with the pump seat, and the other end of the hollow support is connected with the motor.

Preferably, in the oil gas recovery pump, the coupling is a quincuncial coupling.

Preferably, in the oil gas recovery pump, a lightening hole is formed in the flower wheel.

Preferably, in the oil gas recovery pump, the vacuum pump is a rotary vane vacuum pump.

Preferably, in the oil gas recovery pump, the sliding piece of the spline is a self-lubricating carbon piece.

Preferably, in the oil gas recovery pump, the motor is an explosion-proof variable frequency motor.

Preferably, in the oil gas recovery pump, a hall sensor for measuring the rotation speed of the motor is provided in the motor.

The oil gas recovery pump provided by the embodiment of the application comprises a vacuum pump and a motor, wherein the vacuum pump comprises a flower wheel, a pump main shaft and a pump seat, one end of the pump main shaft is inserted into a central hole of the flower wheel and is connected with a flower wheel key, the other end of the pump main shaft is rotatably arranged on the pump seat through a bearing assembly, and the top end of the flower wheel is connected with the pump main shaft through a bolt. In this scheme through key and bolt with flower wheel fixed mounting on the pump main shaft, specifically, pump main shaft and flower wheel key-type connection to carry out circumference location to the flower wheel, prevent the circumferential motion of flower wheel along the pump main shaft, pump main shaft and flower wheel pass through bolted connection, in order to carry out axial location to the flower wheel, in order to prevent that the flower wheel from moving in the axis direction of pump main shaft. The spline wheel is circumferentially and axially positioned, so that friction between the spline wheel and the upper wear-resisting piece and between the spline wheel and the lower wear-resisting piece is reduced, the running stability of the vacuum pump is improved, and the service life of the vacuum pump is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to obtain other drawings from the provided drawings without inventive effort, and to apply the present application to other similar situations from the provided drawings. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

FIG. 1 is a cross-sectional view of an oil and gas recovery pump of the present application;

FIG. 2 is a cross-sectional view of the flower wheel of FIG. 1 taken along line A-A;

fig. 3 is a cross-sectional view of the fig. 1 wheel along B-B.

Wherein:

1. The vacuum pump comprises a vacuum pump body, 11, a spline wheel, 111, sliding sheets, 112, a mounting groove, 113, a weight reducing hole, 12, a pump main shaft, 13, a pump seat, 14, bolts, 15, a first bearing, 16, a bearing spacer, 17, a second bearing, 18, a double-lip oil seal, 2, a motor, 3, a coupler, 4 and a hollow bracket.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting of the application. The described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that, for convenience of description, only a portion related to the related application is shown in the drawings. Embodiments of the application and features of the embodiments may be combined with each other without conflict.

Please refer to fig. 1-3.

Some embodiments of the application disclose an oil gas recovery pump, comprising a vacuum pump 1 and a motor 2, wherein the vacuum pump 1 comprises a pump cover, a pump body, a spline 11, a pump main shaft 12 and a pump seat 13.

As shown in fig. 1, pump cover and pump seat 13 are respectively disposed at two ends of the axial direction of the pump body, flower wheel 11 and pump main shaft 12 are both disposed in the pump body, the top end of flower wheel 11 is attached to the pump cover, upper wear pad is disposed between the top end of flower wheel 11 and the pump cover, the bottom end of flower wheel 11 is attached to pump seat 13, lower wear pad is disposed between the bottom end of flower wheel 11 and pump seat 13, one end of pump main shaft 12 is inserted into the central hole of flower wheel 11 and is connected with flower wheel 11 by key, the other end of pump main shaft 12 is rotatably mounted on pump seat 13 by bearing assembly, and the top end of flower wheel 11 is connected with pump main shaft 12 by bolt 14. Preferably, the bolts 14 are socket head cap bolts.

Specifically, after the spline 11 is connected to the pump main shaft 12 by a key, the spline 11 is connected to the pump main shaft 12 by a bolt 14.

According to the scheme, the flower wheel 11 is fixedly arranged on the pump main shaft 12 through the key and the bolt 14, specifically, the pump main shaft 12 is connected with the flower wheel 11 through the key so as to circumferentially position the flower wheel 11, the flower wheel 11 is prevented from circumferentially moving along the pump main shaft 12, and the pump main shaft 12 is connected with the flower wheel 11 through the bolt 14 so as to axially position the flower wheel 11, so that the flower wheel 11 is prevented from moving in the axial direction of the pump main shaft 12. By positioning the spline 11 circumferentially and axially, friction between the spline 11 and the upper wear plate and the lower wear plate is reduced when the spline 11 rotates, so that the running stability of the vacuum pump 1 is improved and the service life of the vacuum pump 1 is prolonged.

The bolt 14 hole formed on the spline 11 is a counter bore so that the plane of the bolt head of the bolt 14 is not more than the plane of the top end of the spline 11 after the pump spindle 12 and the spline 11 are connected by the bolt 14.

Meanwhile, friction between the spline 11 and the upper wear plate and the lower wear plate is reduced, and noise during operation of the vacuum pump 1 can be reduced to some extent.

The pump main shaft 12 is rotatably connected with the pump seat 13 through a bearing assembly, so that not only the abrasion of the pump main shaft 12 during high-speed operation of the pump can be reduced, but also the dynamic balance during high-speed operation of the pump main shaft 12 can be ensured.

The pump cover is provided with the air pipe connector, the air pipe connector is provided with an air inlet hole and an air outlet hole which are mutually independent, and the air inlet hole and the air outlet hole are different-diameter holes so as to reduce the connection difficulty of the pipeline and the air pipe connector and improve the integration level of the oil gas recovery pump. The orientation of the inlet and outlet holes is adjusted as desired by those skilled in the art, preferably perpendicular to the axial direction of the pump spindle 12.

In some embodiments of the present application, the air inlet and the air outlet are both provided with a filter screen, the filter screen disposed on the air inlet is used for filtering impurities in the oil gas entering the vacuum pump 1, and the filter screen disposed on the air outlet is used for filtering the oil gas discharged into the oil storage tank after passing through the vacuum pump 1, so as to filter impurities generated after the oil gas runs in the pump cavity of the vacuum pump 1.

The fire-retardant net is arranged at the joint of the air pipe joint and the pump cover, so that the safety fire-retardant and explosion-proof effects are achieved, and the sealing ring is arranged between the air pipe joint and the pump cover.

The pump cover is provided with an air inlet and an air outlet which are communicated with a pump cavity of the vacuum pump 1, and the air inlet and the air outlet are special-shaped openings; the pump cover is connected with the end face of the pump cavity of the vacuum pump 1 in a sealing way through a sealing ring.

In some embodiments of the application, the bearing assembly includes a first bearing 15, a bearing spacer 16, and a second bearing 17. As shown in fig. 1, the bearing spacer 16 is located between the first bearing 15 and the second bearing 17, and the first bearing 15 is close to the spline 11 with respect to the second bearing 17, and the bearing assembly is pressed against the pump seat 13 by the bearing cover.

The bearing spacer 16 can adjust the gap between the inner ring and the outer ring of the bearing to control friction, reduce the noise of bearing movement, limit the movement range of the rollers in the axial direction and the radial direction, improve the precision and the reliability of the bearing, solve the elastic deformation caused by load change, split the axial force and the radial force, reduce the difference of acting force on the inner ring and the outer ring, and improve the bearing capacity and the service life of the bearing.

The bearing assembly is not limited to the above structure, but may be other structures, and the specific structure is selected by those skilled in the art according to actual needs, and is not specifically limited herein.

In order to further optimize the technical scheme, the oil gas recovery pump disclosed by the application is provided with the double-lip oil seal 18 between the pump main shaft 12 and the pump seat 13, so that the sealing between the pump main shaft 12 and the pump seat 13 is ensured.

The vacuum pump 1 is not only suitable for an oil gas recovery pump in which the vacuum pump 1 and the motor 2 are coaxially arranged, but also suitable for an oil gas recovery pump in which the vacuum pump 1 is positioned at one side of the motor 2 and the vacuum pump 1 and the motor 2 are connected through a transmission member.

In the prior art, the vacuum pump 1 and the motor 2 of the oil gas recovery pump coaxially arranged with the vacuum pump 1 share the same shaft with the motor 2, and are of an integral type integral structure which is not detachable, and if any part of the motor 2 and the vacuum pump 1 breaks down, the integral structure must be replaced, so that the maintenance cost is high.

In the scheme, a pump main shaft 12 of a vacuum pump 1 is connected with a motor shaft of a motor 2 through a coupler 3, a hollow bracket 4 is sleeved on the coupler 3, one end of the hollow bracket 4 is connected with a pump seat 13, and the other end of the hollow bracket 4 is connected with the motor 2.

The vacuum pump 1 and the motor 2 of the oil gas recovery pump are formed into a split structure through the coupler 3 and the hollow bracket 4, and the coupler 3 has good coaxiality supplementing capability and can ensure coaxiality of the oil gas recovery pump with the split structure.

The vacuum pump 1 and the motor 2 are connected and assembled through the coupler 3, so that the disassembly and assembly of the oil gas recovery pump are convenient, and when the vacuum pump 1 or the motor 2 fails, the vacuum pump 1 or the motor 2 which fails can be only maintained, and the maintenance cost of the oil gas recovery pump is reduced.

The coupling 3 may be a rigid coupling or a flexible coupling.

Preferably, the coupling 3 is a flexible coupling.

The flexible coupling has the function of connecting the vacuum pump 1 and the motor 2 and also has the function of shock absorption.

In some embodiments of the application, the flexible coupling is a quincuncial coupling. The plum blossom shaft coupling is provided with a motor claw disc used for being connected with a motor shaft, an elastomer and a pump head claw disc used for being connected with a pump main shaft 12, wherein the motor claw disc and the pump head claw disc are made of 45 steel, the elastomer is made of engineering plastic or rubber, and the elastomer plays roles of buffering and reducing vibration. The motor claw disc, the elastic body and the pump head claw disc can be three-petal, four-petal, six-petal, eight-petal or ten-petal plum blossom-shaped. The plum coupling has the advantages of simple structure, no need of lubrication, convenient maintenance, convenient inspection, no maintenance, wear resistance and oil resistance, and good shock absorption, buffering and electrical insulation properties; the working temperature is-35 ℃ to +80 ℃, the working environment of the oil gas recovery pump can be completely satisfied, and the continuous long-term operation can be realized.

The weight of the spline 11 influences the torque and power of the operation of the vacuum pump 1, the spline 11 is heavy, the power required to be output by the motor 2 is also increased, and the energy consumption of the oil gas recovery pump is increased. In order to reduce the energy consumption of the oil gas recovery pump, the application is provided with the lightening holes 113 in the flower wheel 11 so as to lighten the weight of the flower wheel 11 and reduce the weight of the flower wheel 11 under the condition of the same volume, thereby reducing the power required to be output by the motor 2 and reducing the energy consumption of the oil gas recovery pump.

As shown in fig. 3, the lightening holes 113 of the flower wheel 11 are sector-shaped. Preferably, the lightening holes 113 are uniformly distributed in the flower wheel 11 to ensure uniform quality throughout the flower wheel 11.

The lightening holes 113 are not limited to the fan-shaped lightening holes, but may be other forms of lightening holes 113, and are not particularly limited herein.

In some embodiments of the application, the vacuum pump 1 is a rotary vane vacuum pump. The flower wheel 11 is provided with a mounting groove 112 for mounting the slide 111. As shown in fig. 2, the angle between the plane of the mounting groove 112 and the diameter of the flower wheel 11 through which the notch of the mounting groove 112 passes is 15 ° -24 °.

Each of the installation grooves 112 is provided therein with a sliding sheet 111, the installation grooves 112 are uniformly distributed in the circumferential direction of the spline 11, and the number of the installation grooves 112 is designed by those skilled in the art according to actual needs, which is not particularly limited herein.

In the embodiment in which the vacuum pump 1 is a rotary vane vacuum pump, the slide 111 of the spline 11 is a self-lubricating carbon sheet. The self-lubricating carbon sheet has good wear resistance and also has the advantages of environmental protection and no pollution. The slide sheet 111 is made of wear-resistant materials, the spline 11 is not contacted with the pump body, the end cover and the pump seat 13, the service life of the vacuum pump 1 is greatly prolonged, and the cost of secondary oil and gas recovery of a gas station is effectively reduced.

When the flower wheel 11 rotates, the sliding sheet 111 is tightly attached to the cavity wall of the pump body under the action of centrifugal force, six spaces are formed among the flower wheel 11, the sliding sheet 111, the pump cover, the cavity wall of the pump body and the pump seat 13, and the six spaces become larger or smaller gradually along the circumferential direction of the flower wheel 11. The space formed from the position of the air inlet end is gradually increased to the maximum space formed when approaching the air outlet end, the space formed when ending the position of the air outlet end is minimum, the space formed by the spline 11 rotates one circle, the space formed is changed from small to large, and then the space formed is changed from large to small, and the vacuum pump 1 completes one cycle of air suction.

Preferably, the motor 2 is an explosion-proof variable frequency motor, has the function of fire resistance and explosion prevention, and improves the use safety of the oil gas recovery pump.

A hall sensor is arranged in the motor 2 and is used for measuring the rotating speed of the motor 2 in real time.

The above description is only illustrative of the preferred embodiments of the present application and the technical principles applied, and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. The scope of the present application is not limited to the specific combination of the above technical features, but also includes other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the present application. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims

1. An oil gas recovery pump is characterized by comprising a vacuum pump (1) and a motor (2), wherein the vacuum pump (1) comprises a spline wheel (11), a pump main shaft (12) and a pump seat (13),

One end of the pump main shaft (12) is inserted into a central hole of the flower wheel (11) and is in key connection with the flower wheel (11), the other end of the pump main shaft (12) is in rotary connection with the pump seat (13) through a bearing assembly, and the top end of the flower wheel (11) is connected with the pump main shaft (12) through a bolt (14).

2. The oil and gas recovery pump according to claim 1, characterized in that the bearing assembly comprises a first bearing (15), a bearing spacer (16) and a second bearing (17) which are sleeved on the pump main shaft (12) in sequence, and the bearing assembly is pressed on the pump seat (13) through a bearing gland.

3. The oil and gas recovery pump according to claim 1, characterized in that a double lip oil seal (18) is provided between the pump spindle (12) and the pump seat (13).

4. The oil and gas recovery pump according to claim 1, characterized in that the vacuum pump (1) is connected with the motor (2) through a coupling (3),

The hollow support (4) is sleeved on the coupler (3), one end of the hollow support (4) is connected with the pump seat (13), and the other end of the hollow support (4) is connected with the motor (2).

5. The oil and gas recovery pump according to claim 4, characterized in that the coupling (3) is a quincuncial coupling.

6. The oil and gas recovery pump according to claim 1, characterized in that lightening holes (113) are provided in the flower wheel (11).

7. The oil and gas recovery pump according to claim 1, characterized in that the vacuum pump (1) is a rotary vane vacuum pump.

8. The oil and gas recovery pump according to claim 7, characterized in that the slip sheet (111) of the spline (11) is a self-lubricating carbon sheet.

9. The oil and gas recovery pump according to claim 1, characterized in that the motor (2) is an explosion-proof variable frequency motor.

10. An oil and gas recovery pump according to claim 9, characterized in that a hall sensor for measuring the rotational speed of the motor (2) is arranged in the motor (2).