KR100573800B1 - Side feeding type external pump for lpg - Google Patents

Abstract

The present invention relates to a side-type external type pump, in particular the working fluid is transported by a fluid transfer unit for inhaling and discharging the working fluid by periodically changing the space volume, while operating in a direction tangential to the rotation direction of the fluid transfer unit A flow chamber into which fluid flows in and out, a motor for supplying rotational force to the fluid transfer part, and a rotational force supply part defined by the flow chamber, and formed on the rotational force supply part for cooling the rotational force supply part. It is equipped with a refrigerant inlet port for supplying a coolant and one side of the rotational force supply unit, and includes a coolant discharge part for discharging the coolant, thereby matching the suction direction of the working fluid with the rotational direction of the pump to improve the suction efficiency while introducing the coolant. For the side flow type LGP which enables cooling by the configuration of the sphere and the discharge port It relates to an external pump.

LPI, External pump, Side flow method, Refrigerant

Description

Side feeding type external pump for LPG}

1 is an exploded perspective view of an external pump of the present invention;

2 is a perspective view and a sectional view of the main part of the fluid transfer unit of the present invention;

3 is a cross-sectional view of the flow chamber of the present invention;

4 is a cross-sectional view of the pump of the present invention,
5 is a perspective view of a first plate of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: flow chamber 120: rotational force supply

140: fluid transfer unit 141: the first plate

142: rotor 143: roller

144: cylinder 145: second plate

150: refrigerant discharge part

The present invention relates to an external type external pump for LGP, and more particularly, a working fluid is transferred by a fluid transfer part which periodically changes a space volume to inhale and discharge a working fluid, while in the rotational direction of the fluid transfer part. A flow chamber in which a working fluid flows in and out in a tangential direction with respect to the flow chamber, a motor for supplying rotational force to the fluid transfer unit, and a rotational force supply unit defined by the flow chamber, and the rotational force for cooling the rotational force supply unit. The suction inlet of the working fluid and the rotational direction of the pump are improved by a configuration including a coolant inlet formed on the supply part to supply a coolant and a coolant discharge part to be discharged from the coolant. The cooling medium can be cooled by the configuration of the refrigerant inlet and outlet. Relates to the way side stream JOSE LG external pump.

In general, a pump refers to a device that transfers fluid by inputting energy. A turbo pump that supplies kinetic energy to the fluid by rotation of a vane and a space that periodically changes the space to inhale and discharge the fluid are transported. It is divided into volumetric pumps and special pumps by other means.

Among the pumps described above, the volumetric pump is used as a fuel pump of an automobile because of its low flow rate but very high hydraulic pressure.

In recent years, liquid phase LPG injection (LPLI) has been used for the use of environmentally friendly fuel, such as LPG as an automobile fuel. there was. However, in the case of the built-in pump, there is a problem that must be replaced at the same time as the fuel tank when a failure occurs, and in recent years, an external fuel pump for installing a pump in a fuel line has been proposed.

However, in the case of the external fuel pump, the suction direction of the fuel and the rotation direction of the pump are orthogonal to each other. That is, if the suction direction of the fuel is a horizontal direction, the rotation direction of the pump is rotated perpendicular to the suction direction, there is a problem that the flow resistance during inhalation resulting in a decrease in suction efficiency.

In order to solve this problem, a side flow type pump having the same suction direction and rotational direction as the fuel has been proposed, but in this case, there is no configuration capable of cooling the motor in which the fuel is incorporated in the pump. That is, in the case of the internal pump, the fuel is cooled by the fuel filled in the fuel tank, and in the case of the general external pump, the fuel is cooled by flowing through the external pump and the motor embedded therein.

However, in the case of the side flow type external pump, since the fuel does not pass through the motor, the motor cannot be cooled, and thus a performance degradation of the motor due to overheating occurs.

The present invention has been made to solve the above-described problems, while the suction direction of the fuel, that is, the working fluid and the rotational direction of the pump coincide with each other, thereby improving the suction efficiency while allowing the pump to pass through the pump. The purpose is to provide an external type pump of the side flow method that can maintain the pump performance.

The above-mentioned object is that the working fluid is conveyed by a fluid conveying part which inhales and discharges the working fluid by periodically changing the space volume, while the working fluid is introduced and discharged in a direction tangential to the rotational direction of the fluid conveying part; And a rotational power supply unit formed with a motor for supplying rotational force to the fluid transfer unit and partitioned from the flow chamber, and a refrigerant inlet formed on the rotational force supply unit for cooling the rotational force supply unit and supplied with a refrigerant. Equipped with one side of the rotational force supply unit comprising a refrigerant discharge unit for discharging the refrigerant to match the suction direction of the working fluid and the rotational direction of the pump to improve the suction efficiency, while for the LLP including the refrigerant inlet and discharge port It can be achieved by an external pump.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration of the present invention.

The present invention, as described above, matches the suction direction of the working fluid called Elphi and the rotational direction of the pump, while improving the suction efficiency by allowing the working fluid to pass through the pump, enabling cooling and improving pump performance. The present invention relates to an external type elbow pump for sustainable side flow.

Referring to FIG. 1, the configuration of the present invention will be described with reference to FIG. 1. The first embodiment includes a flow chamber 110 for sucking and discharging a working fluid to an engine side and a rotation force supply unit 120 for supplying rotational force to the flow chamber 110. .

In the flow chamber 110, a fluid transfer unit 140 for suctioning and discharging a working fluid by periodically changing a space volume is disposed, and an inlet port 112a and an outlet port 113a formed on the flow chamber 110. The working fluid is introduced into and discharged from the fluid transfer part 140 by this. In addition, a rotation force supply unit 120 in which a motor for rotating the fluid transfer unit 140 is embedded is formed at one side of the flow chamber 110. By such a configuration, the suction direction of the working fluid coincides with the rotation direction of the fluid transfer unit 140, thereby reducing the resistance of the flow to improve the suction efficiency.

In this case, the flow chamber 110 and the rotational force supply unit 120 are isolated from each other because the working fluid flowing by the fluid transfer unit 140 is prevented from leaking to the rotational force supply unit 120.

Meanwhile, a refrigerant inlet 122 formed on the rotational force supply unit 120 and mounted on one side of the rotational force supply unit 120 to supply a refrigerant to cool the motor embedded in the rotational force supply unit 120 is mounted on the refrigerant. Coolant is flowed through the motor by the coolant discharge part 150 through which the coolant is discharged, thereby cooling.

In the present invention, the working fluid, that is, the LLP fuel is used as the refrigerant. That is, the working fluid is introduced into the refrigerant inlet 122 using the internal pressure (about 2 bar) of the fuel tank in which the LLP fuel is filled.

Such a configuration improves the suction efficiency of the pump and prevents overheating by cooling the motor to maintain the performance of the pump.

In addition, since the LPM fuel passes through the flow chamber only without passing through the motor part of the hot pump, the increase in fuel temperature due to the passage of the fuel pump is unlike that of other pumps. You can remove all of them.

Hereinafter, the fluid transfer unit 140 will be described with reference to FIGS. 1 and 2.

The fluid transfer unit 140 is a rotor 142 is disposed in the donut-shaped cylinder 144 and a roller 143 is disposed on the rotor 142. At this time, the fluid is sucked and discharged by the rotational movement of the rotor 142 and the roller 143, as described in detail in the Applicant's Patent No. 505821.

At this time, the flow path of the working fluid to be sucked and discharged is due to the first plate 141 and the second plate 145.

The first plate 141 and the second plate 145 have a similar shape, and protrusions 141b and 145b protrude from the flat portions 141a and 145a in the shape of disks. The protrusions 141b and 145b may have a circular shape or a side surface protruding into a fan shape at the centers of the flat parts 141a and 145a. (See FIG. 5) However, the second plates 145 are extended from the motor. The rotation shaft through-hole 145c for penetrating the rotating shaft 121 is formed is a different point.

The fluid is transferred by the configuration of the fluid transfer unit 140 as described above will be described in detail with reference to FIG.

2 is a rotor 142 mounted in the cylinder 144 to clearly display the working fluid flow therein with the first plate 141, the cylinder 144, and the second plate 145 assembled. And the configuration of the roller 143 is omitted.

By the rotational motion of the rotor 142 and the roller 143, the working fluid is between the flat portion 141a of the first plate 141 and the cylinder 144, and the flat portion 145a of the second plate 145 and It is sucked through the suction gap I formed at one side between the cylinders 144 and discharged to the discharge gap O which is formed on the opposite side of the suction gap I.

The working fluid conveyed through the fluid transfer unit 140 as described above is introduced through the inlet 112a as shown in FIG. 3. Thereafter, the working fluid is introduced into the fluid transfer part 140 by the suction hole 112b formed at an upper side of the inner circumferential surface of the space 111 in which the fluid transfer part 140 is accommodated and in communication with the suction port 112a. The discharge hole 113b is formed at one side of the suction hole 112b and communicated with the discharge hole 113a to be discharged.

As described above, the flow direction of the fluid is in contact with the rotational direction of the fluid transfer part 140 by the configuration of the suction port 112a, the suction hole 112b, the discharge port 113a, and the discharge hole 113b. At the moment when the fluid is in contact with the fluid transfer part 140, the flow direction becomes the same direction to improve the suction efficiency as described above.

Meanwhile, as described above, the flow chamber 110 and the rotational force supply unit 120 are isolated from each other so that the fluid pressurized in the flow chamber 110 does not leak, and the rotational force supply unit 120 does not pass through the working fluid. A separate chiller is needed.

That is, as described above, the conventional internal fuel pump is mounted inside the fuel tank to be cooled by the fuel filled in the fuel tank, but in the external pump like the present invention, a means for performing the cooling is required separately. will be.

In the present invention, as shown in Figure 1 is formed on the rotational force supply unit 120 is mounted on the refrigerant inlet 122 for supplying the refrigerant and one side of the rotational force supply unit 120, the refrigerant discharge unit for discharging the refrigerant By the configuration of 150, the coolant is cooled via the rotational force supply unit 120. In this case, the coolant discharge part 150 includes a cover 152 mounted on the rotational force supply part 120 and a coolant discharge port 151 mounted on the cover 152.

In particular, in the present invention, the refrigerant uses LLP fuel, which is a working fluid. The LPG fuel is filled in the fuel tank, and the filling pressure thereof is about 2 bar, so that the working fluid is introduced into the external pump of the present invention using this pressure.

Meanwhile, as described above, the flow chamber 110 and the rotational force supply unit 120 are isolated from each other. At this time, the rotation shaft 121 extending from the motor embedded in the rotational force supply unit 120 and connected to the fluid transfer unit 140 penetrates. A rotating shaft through hole 115 is formed as shown in FIG. 3.

Since the working fluid flowing in the flow chamber 110 by the rotating shaft through hole 115 may leak into the rotating force supply unit 120, a sealing member 116 may be installed in the rotating shaft through hole 115 to leak. It is desirable to prevent this. (See FIG. 4).

As described above, conventionally, the suction direction of the fuel and the rotational direction of the pump are orthogonal, so that the flow resistance is generated when the working fluid is inflow, and the suction efficiency is lowered. In the case of the external pump, the fuel does not pass through the motor. There was a problem that can not be cooled and the performance degradation of the motor due to overheating accordingly,

In the case of the external type pump for side flow type ELP according to the present invention, the suction direction of the working fluid and the rotation direction of the pump coincide with each other, while the suction fluid is passed through the pump to improve the suction efficiency and to allow cooling. It is effective to maintain the pump performance.

In addition, since the liquid pump passes through the fluid conveying part instead of passing through the motor part of the pump in which the LPG fuel is heated up, the fuel temperature increase due to the passage of the fuel pump is unlike that of other pumps. There is also the advantage of removing all.

Claims (5)

The working fluid is conveyed by the fluid conveying part 140 which inhales and discharges the working fluid by periodically changing the space volume, while the working fluid is introduced and discharged in a tangential direction with respect to the rotational direction of the fluid conveying part 140. Chamber 110; and A rotational force supply unit 120 which is formed while being partitioned with the flow chamber 110 while a motor for supplying rotational force to the fluid transfer unit 140 is built-in; Refrigerant discharge unit formed on the rotational force supply unit 120 for cooling the rotational force supply unit 120 and mounted on one side of the rotational force supply unit 120 and a refrigerant introduction port 122 through which the refrigerant is supplied. External pump for side flow type LLP, characterized in that it comprises a (150). The method of claim 1, The fluid transfer unit 140 is disposed in the cylinder 142 and is rotated by the rotation shaft 121 of the rotational force supply unit 120 to be disposed in the rotor 143 and the rotor 143 to suck and discharge the working fluid. Roller 144, It is disposed on the front side of the cylinder 142 to provide a flow path of the suction fluid is formed in the center of the disk-shaped flat portion (141a) in a circular shape while protruding in a fan shape on both sides ( The first plate 141 is formed 141b, It is disposed on the rear side of the cylinder 142 to provide a flow path for discharging the sucked working fluid, is formed in a circular shape in the center of the flat portion (145a) of the disc-shaped while protruding in a fan-shaped on both sides And a second plate 145 having a protrusion 145b formed therein and a through hole 145c through which the rotation shaft 121 of the rotational force supply unit 120 penetrates in the center of the protrusion 145b. External pump for side flow type LLP. The method of claim 1, Rotating shaft through-hole 115 is formed on the side of the flow chamber 110 to penetrate the rotating shaft 121 is extended from the rotational force supply unit 120, the sealing member inserted into the rotating shaft through-hole 115 External pump for side flow type LLP, characterized in that it further comprises (116). The method of claim 1, The flow chamber 110 is formed above the inner circumferential surface of the space portion 111 accommodating the fluid transfer part 140, and the suction hole 112b into which the working fluid is injected into the fluid transfer part 140, and the fluid A discharge hole 113b through which the working fluid discharged from the sending unit 140 is discharged to the outside is formed, An external type pump for side flow type LLP, characterized in that the suction port (112a) and the discharge port (113a) respectively connected to the suction hole (112b) and the discharge hole (113b) is mounted on the flow chamber (110). delete

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