KR100940905B1 - Side ??? Fuel Pump of Heat-follower Control-structure - Google Patents

Abstract

The present invention relates to a heat load suppression structure of a side flow type LLP external fuel pump, and more particularly, a case is formed to install the fuel pump therein, and a partition wall is installed inside the case, thereby through the outlet of the flow chamber. As the discharged lpage fuel is circulated inside the case, the high temperature lpage fuel is cooled to reduce the heat load, thereby improving durability of the device receiving the lpgi fuel from the fuel pump.

As described above, the present invention provides a fuel pump for compressing and pumping an LPG fuel (Liquefied Petroleum Gas, LPG),

A flow chamber in which an inlet and an outlet are formed at one side to inject / discharge the LLP fuel;

A fluid transfer unit installed inside the flow chamber and configured to transfer the Elpji fuel introduced / exited through the inlet and the outlet by changing the space volume periodically;

A rotational force supply unit in which a motor for supplying rotational force to the fluid transfer unit is built-in and partitioned from the flow chamber;

It is installed to surround the fuel pump, while cooling the high temperature of the vellum fuel discharged through the outlet of the flow chamber while reducing the heat load is formed to a plurality of outlets to be discharged to the outside; .

For side flow, external type, fuel pump, LP, heat load, case, diaphragm

Description

Side LP Fuel Pump of Heat-follower Control-structure}

The present invention relates to a heat load suppression structure of a side flow type LLP external fuel pump, and more particularly, a case is formed to install the fuel pump therein, and a partition wall is installed inside the case, thereby through the outlet of the flow chamber. As the discharged LFG fuel is circulated inside the case, the high temperature LFG fuel is cooled to reduce the heat load, thereby improving the durability of the device for receiving the LPG fuel from the fuel pump. It is about.

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.

By the way, the external fuel pump pumps the LLP fuel by driving the shaft formed in the motor therein and delivers it to the engine. At this time, the bearing is connected to the inside of the fuel pump so that the shaft rotates in place without shaking, the bearing is continuously rubbed with the inner surface of the fuel pump by the rotation of the shaft is abrasion in the long-term use, the rotational force of the motor is reduced to reduce the fuel pump The problem of low efficiency occurs.

In addition, the maintenance cost of repair and replacement due to the wear of the bearing is increased to reduce the productivity and demand of the external fuel pump.

The present invention has been made to solve the above problems,

A case is formed to install a fuel pump therein, and a partition wall is installed inside the case, so that the high-temperature vellum fuel is cooled by reducing the heat load while the elf-fuel discharged through the outlet of the flow chamber is circulated inside the case. Therefore, it is an object of the present invention to provide a heat load suppression structure of an external flow type peg-type fuel pump for improving the durability of the device receiving the Elpji fuel from the fuel pump.

In order to achieve the above object, the present invention provides a fuel pump for compressing and pumping LPG (Liquefied Petroleum Gas, LPG) fuel,

A flow chamber in which an inlet and an outlet are formed at one side to inject / discharge the LLP fuel;

A fluid transfer unit installed inside the flow chamber and configured to transfer the Elpji fuel introduced / exited through the inlet and the outlet by changing the space volume periodically;

A rotational force supply unit in which a motor for supplying rotational force to the fluid transfer unit is built-in and partitioned from the flow chamber;

A case having a plurality of outlets formed to surround the fuel pump, the plurality of outlets being formed to be discharged to the outside by reducing the heat load while cooling the high-temperature lpig fuel discharged through the outlet of the flow chamber; It relates to a heat load suppression structure of a side flow type LLP external fuel pump.

As described above, in the heat load suppression structure of the side flow type LLP external fuel pump of the present invention, a case is formed to install the fuel pump therein, and a partition wall is installed inside the case, thereby through the outlet of the flow chamber. As the discharged lpgi fuel is circulated inside the case, the high temperature lpgi fuel is cooled to reduce the heat load, thereby improving the durability of the device receiving the lpgi fuel from the fuel pump.

The present invention has the following features to achieve the above object.

The present invention is a fuel pump for compressing and pumping the LPG (Liquefied Petroleum Gas, LPG) fuel,

A flow chamber in which an inlet and an outlet are formed at one side to inject / discharge the LLP fuel;

A fluid transfer unit installed in the flow chamber and configured to periodically transfer space of the Elpji fuel introduced / exited through the inlet and the outlet to change the space volume;

A rotational force supply unit in which a motor for supplying rotational force to the fluid transfer unit is built-in and partitioned from the flow chamber;

It is installed to surround the fuel pump, while cooling the high temperature of the vellum fuel discharged through the outlet of the flow chamber while reducing the heat load is formed to a plurality of outlets to be discharged to the outside; .

The present invention having such a feature will be more clearly described through the preferred embodiment accordingly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a cross-sectional view showing a heat load suppression structure of the external flow of the vellum external fuel pump according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the external flow of the vellum external fuel pump according to an embodiment of the present invention, 3 is a perspective view showing a fluid transfer unit according to an embodiment of the present invention, Figure 4 is an enlarged view showing a portion A of FIG.

As shown in the drawing, the heat load suppression structure of the side flow type LLP external fuel pump according to the present invention includes a flow chamber 10, a rotational force supply unit 20, a fluid transfer unit 40, and a case 50.

In the flow chamber 10, a fluid transfer part 40 for suctioning and discharging a working fluid by periodically changing a volume of space is disposed, and an inlet 12 and an outlet 13 formed on the flow chamber 10 are provided. The working fluid is introduced into and discharged from the fluid transfer part 40 by the. In this case, a lid 46 is further formed to seal the fluid transfer part 40 after being disposed in the flow chamber 10.

In addition, a rotation force supply unit 20 in which a motor 24 for rotating the fluid transfer unit 40 is embedded is formed at one side of the flow chamber 10. At this time, the end portion of the rotational force supply unit 20 is blocked by the supply unit cover 22 is coupled by the coupling means so that the motor 24 or the internal inspection and the like installed therein can be opened and closed when necessary.

Here, the insertion groove 23 is inserted into the central portion of the inner surface of the supply part cover 22 to prevent the moving shaft 21 from being shaken and detached when the rotating shaft 21 is contacted with the rotating shaft 21 extending from the motor 24. Is formed.

At this time, the ball 30 is inserted into the end of the rotary shaft 21 which is in contact with the feed part cover 22 insertion groove 23 of the rotational force supply unit 20, the ball 30 is inserted into the rotary shaft 21 In order to minimize friction with the supply cover 22 during the rotation of the ball 30 is not fixed. Then, the coupling groove 21a is formed at the end of the rotation shaft 21 so that the ball 30 can be inserted. On the contrary, in the state in which the ball 30 is inserted into the insertion groove 23 of the supply part cover 22, the coupling groove 21a of the rotation shaft 21 may be contacted.

By this configuration, the suction direction of the working fluid coincides with the rotation direction of the fluid transfer part 40, thereby reducing the resistance of the flow and improving the suction efficiency.

In this case, the flow chamber 10 and the rotational force supply unit 20 are isolated from each other because the operating fluid flowing by the fluid transfer unit 40 is prevented from leaking to the rotational force supply unit 20.

Hereinafter, the fluid transfer part 40 will be described with reference to FIGS. 2 and 3.

In the fluid transfer part 40, a roller vane 42 is disposed in a donut-shaped cylinder 44, and a roller 43 is disposed on the roller vane 42. At this time, the fluid is sucked and discharged by the rotational movement of the roller vanes 42 and the rollers 43 as described in detail in the applicant's Patent No. 508281. At this time, the flow path of the working fluid to be sucked and discharged is due to the first plate 41 and the second plate 45.

The first plate 41 and the second plate 45 have a similar shape, and the protrusions 45b protrude from the flat portion 45a having a disc shape. The protruding portion 45b has a shape in which a circular portion or a side surface protrudes in a fan shape at the center portion of the flat portion 45a. However, in the center of the second plate 45, a rotation shaft through hole 45c for penetrating one side of the rotation shaft 21 extending from both sides of the motor 24 is provided. In this case, the first plate 41 is not the same as the second plate 45 in the drawings.

In addition, by the rotational movement of the roller vane 42 and the roller 43, the working fluid is located between the first plate 41 and the cylinder 44, and between the second plate 45 and the cylinder 44. It is sucked through the suction gap I formed 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 part 40 as described above is introduced through the inlet 12 as shown in FIG. Thereafter, the working fluid is introduced into the fluid transfer part 40 by the suction hole 12a which is formed at an upper side of the inner circumferential surface of the space part 11 in which the fluid transfer part 40 is accommodated and communicates with the inlet 12. The discharge hole 13a is formed at one side of the suction hole 12a to communicate with the discharge port 13 and discharged. In this case, the case 50 is installed outside the fuel pump 100, so that the outlet 13 is formed inside the case 50 to suppress the temperature of the working fluid discharged through the outlet 13. In addition, the inlet 12 is formed through the outer surface of the case 50 in order to introduce the external working fluid into the interior and communicate with the outside.

As described above, the flow direction of the fluid is in contact with the rotational direction of the fluid transfer part 40 by the configuration of the inlet 12, the suction hole 12a, the outlet 13, and the discharge hole 13a. At the moment of contact between the fluid and the fluid transfer part 40, the flow direction becomes the same direction, thereby improving suction efficiency as described above.

Meanwhile, as described above, the flow chamber 10 and the rotational force supply unit 20 are isolated from each other so that the fluid pressurized in the flow chamber 10 does not leak, so that the rotational force supply unit 20 does not pass through the working fluid. It does not need a separate cooling device.

Meanwhile, as described above, the flow chamber 10 and the rotational force supply unit 20 are isolated from each other. At this time, the rotation shaft 21 is extended from the motor 24 embedded in the rotational force supply unit 20 and connected to the fluid transfer unit 40. Rotation shaft through-hole 14 through which the through) is formed as shown in FIG. 1.

Since the working fluid flowing in the flow chamber 10 may leak to the rotational force supply unit 20 by the rotation shaft through hole 14, a bushing 15 may be installed in the rotation shaft through hole 14 to prevent leakage. It is desirable to prevent. In addition, the bushing 15 surrounds the rotation shaft 21 and serves to hold the shake of the rotation shaft 21.

The case 50 has a hollow inside to install the fuel pump 100 therein, and is discharged through the outlet 13 of the flow chamber 10 between the case 50 and the fuel pump 100. Cooling the hot Elpji fuel through the circulation inside the case 50 to reduce the heat load of the Elpji fuel. In addition, a plurality of outlets 51 are formed at one end of the case 50 in order to discharge the constantly cooled LLP fuel from the case 50 to the outside.

Here, a partition wall 52 is formed inside the case 50 to circulate the high temperature LPI fuel in several branches, and the partition wall is formed on the inner surface of the case 50 and the outer surface of the fuel pump 100. It is supported and guides the LPI fuel.

1 is a cross-sectional view showing a heat load suppression structure of a side flow type LLP external fuel pump according to an embodiment of the present invention,

Figure 2 is an exploded perspective view showing an external LPI external fuel pump according to an embodiment of the present invention,

3 is a perspective view showing a fluid transfer unit according to an embodiment of the present invention,

4 is an enlarged view illustrating a portion A of FIG. 1.

<Description of Symbols for Major Parts of Drawings>

10: flow chamber 11: space

12 inlet port 13 outlet port

14: rotating shaft through hole 15: bushing

20: rotational force supply unit 21: rotation axis

22: supply part cover 23: insertion groove

24: motor 30: ball

40: fluid transfer part 41: the first plate

42: roller vane 43: roller

44 cylinder 45 second plate

46: lid 50: case

51: exit 52: diaphragm

100: fuel tank

Claims (7)

In the fuel pump for compressing and pumping the LPG (Liquefied Petroleum Gas, LPG) fuel, A flow chamber 10 in which an inlet 12 and an outlet 13 are formed at one side in order to inject / discharge the LLP fuel; A fluid transfer part (40) installed inside the flow chamber (10), the fluid transfer part (40) formed to periodically change the space volume of the LLP fuel introduced / exited through the inlet (12) and the outlet (13); A rotational force supply unit 20 having a motor 24 for supplying rotational force to the fluid transfer unit 40 and partitioned from the flow chamber 10; The case is installed to surround the fuel pump, the case in which a plurality of outlets 51 are formed so as to be discharged to the outside by reducing the heat load while cooling the high-temperature lpgi fuel discharged through the outlet 13 of the flow chamber 10 ( 50); Heat load suppression structure of the side LLP external fuel pump for the side, characterized in that comprising a. The method of claim 1, The rotational force supply unit 20 is composed of an electric motor 24 for generating a rotational force by electricity and a rotating shaft 21 formed therethrough so as to transmit the rotational force of the electric motor 24, the rotational shaft 21 Is connected to the fluid transfer part 40, the electric motor 24 is fixed to the inside of the rotational force supply unit 20, the bushing 15 to the rotating shaft 21 in contact with the rotational force supply unit 20 so that the rotational shaft 21 is rotated Heat load suppression structure of the side LLP external fuel pump characterized in that a plurality of) is installed. The method of claim 1 or 2, wherein the fluid transfer portion 40, Roller vanes 42; The roller vane 42 is disposed therein and rotated by the rotating shaft 21 of the rotational force supply unit 20 to suck and discharge the working fluid; A cylinder 44 disposed on an outer circumferential surface of the roller vane 42; It is disposed on the front side of the roller vanes 42 to provide a flow path of the suction fluid is formed in the center of the flat portion of the disk-shaped circular portion while the protruding portion is formed protruding in the shape of a fan One plate 41; It is disposed on the rear side of the roller vane 42 to provide a flow path for discharging the sucked working fluid, is formed in a circular shape in the center of the flat portion 45a of the disk shape while protruding in a fan shape on both sides A second plate 45 having a protrusion 45b and a through hole 45c through which the rotation shaft 21 of the rotation force supply unit 20 penetrates in the center of the protrusion 45b; Heat load suppression structure of the external LLP external fuel pump for side flow comprising a. The method of claim 1, The flow chamber 10 has an intake hole connected to the inlet 12 and the outlet 13 so that the LLP fuel flows into / out of the flow chamber 10 through the inlet 12 and the outlet 13 ( 12a) and the discharge hole 13a are formed, the heat load suppression structure of the external side of the vellum external fuel pump. The method of claim 2, At the end of the rotating shaft 21, when the electric motor 24 is fixed in the rotational force supply unit 20, the ball 30 is inserted so that the smooth rotation while preventing the shaking, side flow type external external Lump pump Heat load suppression structure. The method of claim 5, An insertion groove 23 is formed in the inner surface of the rotational force supply unit 20 that is in contact with the rotation shaft 21 so as to fit the ball 30 inserted into the end of the rotation shaft 21 so that the ball 30 is not separated. The heat load suppression structure of the external LLP external fuel pump for side flow. The method of claim 1, Inside the case 50, a partition 52 is formed to circulate the high temperature LPI fuel in various ways to cool the heat load restraint structure of the external LPI external fuel pump.

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