KR101129536B1 - Vacuum pump assembly for recovering oil vapor - Google Patents

Abstract

The present invention drives the vane pump unit directly in conjunction with a brushless motor (BLDC) in the process of recovering oil vapor, which is a volatile organic compound, and has a vane structure having a vane structure composed of a phenol resin laminate having excellent lubricity, wear resistance, and heat resistance. A receiving vacuum pump assembly.

The oil vapor recovery vacuum pump assembly of the present invention, the oil vapor recovery vacuum pump assembly, both sides of the motor housing is open; The brushless BLDC is accommodated from one side of the motor housing and prevents explosion by separating the oil vapor. A motor unit; And it is received from the other side of the motor housing, characterized in that it comprises a vane pump unit for generating a vacuum through the process of suction, expansion, compression, exhaust.

Vapor, Vacuum Pump, Rotor, Vane, Cylinder

Description

Vacuum pump assembly for oil vapor recovery {VACUUM PUMP ASSEMBLY FOR RECOVERING OIL VAPOR}

The present invention relates to a vacuum pump assembly, and more particularly, to a vane pump unit directly connected to a brushless motor (BLDC) in a process of recovering oil vapor, which is a volatile organic compound, to a phenolic resin laminate having excellent wear resistance. The present invention relates to a vacuum pump assembly for recovering steam having a vane structure.

In general, oil vapors are volatile organic compounds (VOCs) such as benzene and toluene that are evaporated into the atmosphere when oil is transferred to or transferred from a petroleum product shipping facility, a gas station storage facility, and an oil tanker.

These vapors are known to be carcinogenic substances that, when exposed to sunlight, combine with nitrogen oxides in the atmosphere to produce urban ozone, and cause damage to the central nervous system, skin mucous membranes, and the respiratory system depending on the degree of human exposure. As a result, in recent years, a steam recovery facility has been installed at gas stations, which has shown considerable effect.

Referring to FIG. 1, the fuel in the underground tank 10 at a gas station is supplied to the fuel tank 32 of the automobile 30 through the pump 22 of the lubricator 20, the flowmeter 24, and the hose 26. The oil vapor generated in the oiling process is recovered through the vacuum pump 40 and flows into the underground tank 10.

Referring to FIG. 2B, a conventional dry running rotary vane vacuum pump (50) for recovering the oil vapor has a rotor (52), a vane (54), a cylinder ( Cylinder 56).

The center of the rotor 52 is assembled eccentrically to the center of the cylinder 56, the four to six vanes 54 are rotated in close contact with the inner wall of the cylinder 56 by the centrifugal force. At this time, a space is formed between the vanes and the vanes, and the vacuum is made by the four-step process of suction, expansion, compression, and exhaust of air and gas as shown in FIG. .

At this time, the vane 54 and the cylinder 56 do not use the oil (lubricating and sealing) (Oil) to create a continuous vacuum by using a carbon vane (Carbon Vane) excellent in lubricity and wear resistance. At this time, the dry rotary vane vacuum pump 50 having the above-described structure generates a higher temperature during operation than the oil circulation rotary vane vacuum pump. Therefore, carbon vanes having excellent lubricity and wear resistance are used, but when used for a long time, the carbon vanes may be worn and need to be replaced.

In addition, the worn vanes 54 had a problem that can cause a big problem if mixed with the vehicle 30 through the nozzle of the tip of the underground tank 10 or the hose 26.

In addition, as shown in FIG. 2A, the belt 58 is driven to reduce and reduce the speed and efficiency of the motor, and the vacuum pump 50 and the motor housing 60 are connected to the belt 58 to provide an installation space. There was a problem that was restricted.

The technical problem to be achieved by the present invention is to reduce the maintenance and wear debris generated by the wear of the existing carbon vanes, it is possible to lengthen the replacement cycle of the vanes, easy to disassemble according to the maintenance of the vacuum pump oil vapor It is to provide a recovery vacuum pump assembly.

Another technical problem to be achieved by the present invention, the rotor is brushless (BLDC) It is to provide a vacuum pump assembly for recovering the oil vapor is improved by the control and driving force of the vacuum pump compared to the conventional belt driving method by being connected directly to the motor driven, the efficiency of the vacuum pump is improved.

Another technical problem to be achieved by the present invention is to provide a vacuum pump assembly for recovering oil vapor, which is capable of maintaining speed and mechanically compact by using a brushless (BLDC) motor capable of sufficient torque control.

According to an aspect of the present invention, there is provided a vacuum pump assembly for recovering steam, the motor housing having both sides open; The brushless BLDC is accommodated from one side of the motor housing and prevents explosion by separating the oil vapor. A motor unit; And a vane pump unit connected to the other side of the motor housing and generating a vacuum through a suction, expansion, compression, and exhaust process.

In the present invention the brushless (BLDC) The motor unit is brushless (BLDC) having a motor shaft protruding toward the open side of the motor housing. A motor; A cable harness fastening member inserted on an outer circumferential surface of the motor shaft and to which an explosion-proof cable harness is fastened; The brushless BLDC inside the motor housing It includes a plurality of cover members for sealing both sides of the motor.

The vane pump unit in the present invention, the rotor housing is fastened to the motor housing through a plurality of fastening means; Intake and exhaust valve terminals provided on an outer circumferential surface of the rotor housing; A rotor eccentrically received in the center of the cylinder in the rotor housing; A plurality of vanes are installed on the rotor and are in close contact with the inner wall of the cylinder of the rotor housing, and include vanes rotating by centrifugal force.

The rotor in the present invention, the brushless (BLDC) It is directly connected to and driven by the motor shaft of the motor.

In the present invention, the vane is made of a phenol resin laminate.

On the other hand, the present invention according to another aspect for achieving the above object, in the steam ash containing vacuum pump assembly, both sides are received from one side of the open motor housing, the brush to prevent explosion by separating the oil vapor Lease (BLDC) A motor unit; And a vane pump unit connected to the other side of the motor housing and generating a vacuum through a suction, expansion, compression, and exhaust process.

According to the present invention, since the vanes rotating together with the rotor in close contact with the inner wall of the cylinder are made of a phenol resin laminate (laminated resin) having excellent lubricity and abrasion resistance as well as heat resistance, maintenance and wear residues according to the wear of existing carbon vanes. It is possible to reduce the occurrence, to lengthen the vane change interval, and to facilitate the disassembly according to the maintenance of the vacuum pump.

In addition, the rotor is brushless (BLDC) Since it is directly connected to the motor and driven, the controllability and driving force of the vacuum pump is superior to the conventional belt driving method, and the efficiency of the vacuum pump is improved.

In addition, by using a brushless (BLDC) motor capable of sufficient torque control it is possible to maintain speed and mechanically compact design.

Hereinafter, the configuration and operation of the oil vapor recovery vacuum pump assembly according to an embodiment of the present invention will be described in detail with the accompanying drawings.

The use of brushless (BLDC) motors for electric motors, which are typically used as driving power in pumps that require long life, efficiency and reliability, not only overcomes the problems associated with conventional permanent magnet DC motors, but also advances in power devices. With the advancement, there is an advantage of increasing the efficiency in the electronic control method.

On the other hand, prior art belt driven motor assembly designs and DC motor and AC motor assembly designs have achieved the intended purpose of the pump, but problems remain. For example, belt drive results in reduced energy transfer efficiency than direct-attached motor assemblies and introduces complexity in installation and assembly structure.

In addition, the normal DC motor or AC motor is not easy to control and maintain the load according to the wear of the brush. In addition, the electrical spark phenomenon generated in the brush causes a problem of flammability of volatile organic solvents such as a vapor recovery device, and inherent the risk of explosion.

Therefore, the inefficient structure of the belt not only increases the efficiency by directly connecting to the motor assembly, but also there is a need to increase the manufacturing cost and ease of installation of the steam pump. In addition, the vanes should be configured to be easy to maintain due to the wear resistance and disassembly of vanes according to the wear of the vanes in the pump.

3 is a perspective view of one side of the vacuum pump assembly for recovering steam according to an embodiment of the present invention, Figure 4 is a perspective view of the other side of the vacuum pump assembly for recovering steam according to the present invention, Figure 5 is for recovering the steam according to the present invention An exploded perspective view of the vacuum pump assembly.

6 is a cross-sectional view of the oil vapor recovery vacuum pump assembly according to the present invention, FIG. 7 is a perspective view of the rotor housing partially cut in the oil vapor recovery vacuum pump assembly according to the present invention, and FIG. 7 is a front view.

9 is a projection view showing the vane assembly which rotates eccentrically inside the cylinder of the rotor housing, and FIG. 10 is a view showing a motor housing and a vane pump unit separated from each other in the vacuum pump assembly for oil vapor recovery according to the present invention. Perspective view.

5, the oil vapor recovery vacuum pump assembly according to an embodiment of the present invention, the motor housing 100 is open at both sides, the brushless (BLDC) received from one side of the motor housing The motor unit 200 and the vane pump unit 300 accommodated from the other side of the motor housing 100.

As shown in FIG. 5, the motor housing 100 has a cylindrical structure in which both sides are open, and a brushless (BLDC) motor unit 200 and a vane pump unit 300, which will be described later through one side and the other side, are respectively connected. do.

The brushless BLDC motor unit 200 is a brushless BLDC as shown in FIGS. 5 and 10. The motor 210 is received through an open side of the motor housing 100, and the brushless BLDC One end of the motor shaft 212 of the motor 210 protrudes toward the open side of the motor housing 100, and the other end of the motor shaft 212 includes the rotor 340 and the second cover member 250 described later. ) Is stored in the rotor housing (310).

In addition, between the motor shaft 212 and the second cover member 250 of the brushless (BLDC) motor 210, the oil or oil vapor that can be introduced / discharged through the rotating motor shaft 212 vacuum pump An oil sealing 260 is installed to block against the outside of the assembly.

In addition, the brushless (BLDC) A cable harness fastening member 230 to which a motor harness (not shown) for motor control and driving to be electrically connected to the motor 210 is fastened is mounted on the outer circumferential surface of the motor shaft 212.

Since the brushless (BLDC) motor unit 200 is housed in the motor housing 100, the spark ignition of the spark ignition by the explosive vapor vapor flowing through the rotor housing 310 described later in the recovery process of the above-described oil vapor. Explosion proof design is possible by blocking risks in advance.

In addition, the first cover member 240 is screwed to the motor housing 100 through a screw thread formed on the outer peripheral surface of the end portion of the inner side of the motor housing 100, the same shape as the first cover member 240 The second cover member 250 having a screw is coupled to the other inner side of the motor housing 100 is the brushless (BLDC) Sealing both sides of the motor 210, the brushless (BLDC) The motor 210 is fixed to the inner surface of the second cover member 250 through a fastening means composed of bolts 220 passing through each corner of the flange.

The vane pump unit 300 is connected to the other side of the motor housing 100, as shown in FIG. That is, the rotor housing 310 is bolted to the other side of the motor housing 100 through a fastening means composed of bolts 370 penetrating at an interval of 120 ° along the inner circumference of the rotor housing, and the rotor housing 310. Intake and exhaust valve terminals 320 and 330 are respectively provided at predetermined intervals on the outer circumferential surface thereof, and the rotor 340 is eccentrically stored in the center of the cylinder 312 in the rotor housing 310. It is.

At this time, the intake and exhaust valve terminals (320, 330) to the explosion flame of the oil vapor introduced into the intake and exhaust valve terminals (320, 330) from the ignition or flame in the vane pump unit 300 of the vacuum pump assembly Meshes 322 and 332 having a circular filter shape are provided to block the outside, and the meshes preferably have a copper (Cu) component.

In addition, four vanes 350 are mounted on the outer circumferential surface of the rotor 340 to be in close contact with the inner wall of the cylinder 312 of the rotor housing 310 by centrifugal force and rotate together with the rotor 340.

That is, the rotor 340 is provided with a groove (not shown) in which four different vanes 350 are detachable, so that each vane 350 is rotated by the centrifugal force when the rotor 340 rotates. Close to the inside of the cylinder 312 and rotates with the rotor 340, a cell is formed between the vane 350 and the vane 350, and air, gas ( Gas is sucked through the intake valve terminal 320, expanded, and compressed, and then exhausted through the exhaust valve terminal 330, thereby creating a vacuum.

At this time, the vane 350 in the present invention is made of a phenol resin laminate (laminated resin) excellent in lubricity and wear resistance, heat resistance. As a result, maintenance and wear debris generation due to the wear of the existing carbon vanes is reduced, it is possible to lengthen the replacement cycle of the vanes 350, it is easy to disassemble according to the maintenance of the vacuum pump.

In addition, the rotor 340, the brushless (BLDC) The motor shaft 212 and the rotor 340 are directly connected to and driven by the motor shaft 212 of the motor 210, and the motor shaft 212 and the rotor 340 are connected through the fixing key 342. ) Rotates integrally.

Accordingly, the controllability and driving force of the vacuum pump is superior to the conventional belt driving method, the efficiency of the vacuum pump is improved, and the speed is maintained and mechanically compact by using a brushless (BLDC) motor capable of sufficient torque control. One design is possible.

In FIG. 5, reference numerals 270, 280, and 360 denote O-rings to prevent electrical sparks or explosions due to overheating of the brushless (BLDC) motor 210 in the motor housing 100 ( Explosion-proof) Smoke emission blocking and waterproofing.

The present invention is not limited to the above described and illustrated in the drawings, and of course, more modifications and variations are possible to those skilled in the art within the scope of the following claims.

1 is a schematic view for explaining the process of fueling and steam recovery at the gas station.

Figure 2a is a photograph showing a dry rotary vane vacuum pump conventionally used to recover the steam.

2B is a view for explaining the structure and driving principle of the dry rotary vane vacuum pump shown in FIG.

Figure 3 is a perspective view of one side of the vacuum pump assembly for oil vapor recovery according to an embodiment of the present invention.

Figure 4 is a perspective view of the other side of the vacuum pump assembly for oil vapor recovery according to the present invention.

5 is an exploded perspective view of a vacuum pump assembly for recovering steam according to the present invention.

6 is a cross-sectional view of the vacuum pump assembly for oil vapor recovery according to the present invention.

7 is a perspective view in a state in which the rotor housing is partially cut in the vacuum pump assembly for recovering steam according to the present invention.

8 is a front view of FIG. 7.

9 is a projection view of the vane assembly rotating eccentrically inside the cylinder of the rotor housing.

10 is a perspective view of the motor housing and the vane pump section in the vacuum pump assembly for oil vapor recovery according to the present invention.

Description of the Related Art

100: motor housing 200: brushless (BLDC) Motor

210: brushless (BLDC) Motor 212: Shaft

230: cable harness fastening member 240: first cover member

250: second cover member 300: vane pump portion

310: rotor housing 312: cylinder

320: intake valve terminal 330: exhaust valve terminal

340: rotor 350: vane

Claims (10)

A motor housing which is open at both sides; It is stored from one side of the motor housing, brushless (BLDC) to prevent explosion by separating from the oil vapor A motor unit; And A vane pump part connected to the other side of the motor housing and generating a vacuum through a process of suction, expansion, compression, and exhaust. In the vacuum pump assembly for recovering steam, comprising: Brushless BLDC The motor part, Brushless (BLDC) with a motor shaft protruding toward the open side of the motor housing A motor; A cable harness fastening member inserted on an outer circumferential surface of the motor shaft and to which an explosion-proof cable harness is fastened; The brushless BLDC inside the motor housing A plurality of cover members for sealing both sides of the motor Vacuum pump assembly for oil vapor recovery comprising a. delete The method of claim 1, The vane pump unit, A rotor housing fastened to the motor housing through a plurality of fastening means; Intake and exhaust valve terminals provided on an outer circumferential surface of the rotor housing; A rotor eccentrically received in the center of the cylinder in the rotor housing; A plurality of vanes installed in the rotor and in close contact with the inner wall of the cylinder of the rotor housing to rotate by the centrifugal force An oil vapor recovery vacuum pump assembly comprising a. The method of claim 3, The rotor is, Brushless BLDC A vacuum pump assembly for recovering steam, characterized in that driven directly connected to the motor shaft of the motor. The method of claim 3, wherein The vane is, A vacuum pump assembly for recovering oil vapor, comprising a phenol resin laminate. Both sides are received from one side of the open motor housing, brushless (BLDC) to prevent explosion by separating from the vapor A motor unit; And A vane pump part connected to the other side of the motor housing and generating a vacuum through a process of suction, expansion, compression, and exhaust. In the vacuum pump assembly for recovering steam, comprising: Brushless BLDC The motor part, Brushless (BLDC) with a motor shaft protruding toward the open side of the motor housing A motor; A cable harness fastening member inserted on an outer circumferential surface of the motor shaft and to which an explosion-proof cable harness is fastened; The brushless BLDC inside the motor housing A plurality of cover members for sealing both sides of the motor Vacuum pump assembly for oil vapor recovery comprising a. delete The method of claim 6, The vane pump unit, A rotor housing fastened to the motor housing through a plurality of fastening means; A rotor eccentrically received in the center of the cylinder in the rotor housing; A plurality of vanes installed in the rotor and in close contact with the inner wall of the cylinder of the rotor housing to rotate by the centrifugal force An oil vapor recovery vacuum pump assembly comprising a. The method of claim 8, The rotor is, Brushless BLDC A vacuum pump assembly for recovering steam, characterized in that driven directly connected to the motor shaft of the motor. The method of claim 8, The vane is, A vacuum pump assembly for recovering oil vapor, comprising a phenol resin laminate.

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