KR20090065259A - Fuel pump for lpg fuel of said feeding - Google Patents

Abstract

An exterior type LPG fuel pump for side feeding inline is provided to prevent the deterioration of durability due to abrasion in a bushing part, a pumping part and a housing even when LPG fuel is introduced in response to motor operation. An exterior type LPG fuel pump for side feeding inline includes a housing(10) formed with an inlet(11) and an outlet(12) for LPG(Liquefied Petroleum Gas) fuel, a pumping part(20) mounted at the inlet of the housing for introducing the LPG fuel into the housing, and a motor part(30) connected to the pumping part and mounted in the housing. The motor part has a first shaft(32) integrating a ball at an end to drive the pumping part, a second shaft(36) supported at the outlet of the housing at the opposite side from the first shaft, and an electric motor(31) connected between the first and second shafts for generating rotation force by electricity.

Description

Fuel Pump for LPP Fuel of Said Feeding

The present invention relates to a side-feeding in-line elbow external fuel pump, and more particularly, to install a bushing on the first and second shafts of the motor to be fixed inside the housing, and to prevent the motor from shaking due to the bushing. By fully engaging the ball integrally at the end and inserting the ball at the end of the second shaft, the motor is fixed, thereby reducing durability due to abrasion of the bushing, the pumping part, and the housing even when the LLP fuel is introduced. It is possible to prevent such as to increase the service life of the fuel pump, thereby reducing the cost of repair and replacement, the case is formed to install the housing therein, the partition wall is installed inside the case, the outlet of the housing The heat load is reduced by cooling the high temperature of the vellum fuel discharged through The durability of the receiving device is improved, and the vellum fuel is introduced into the side by the roller vane is transported inline by the roller vane, so that the lpgi fuel is good suction at the inlet, thereby improving the efficiency of the inlet flow of the lippage external type for inline It relates to a fuel 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.

As discussed above, as a problem of the background art,

In general, 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,

Bushings are installed on the first and second shafts of the motor so as to be fixed inside the housing, and the balls are integrally and completely coupled to the ends of the first shaft and the balls are inserted into the ends of the second shaft to prevent the motor from shaking due to the bushings. By fixing the motor, it is possible to prevent deterioration in durability due to wear of the bushing part, the pumping part and the housing even when the LLP fuel is introduced when the motor is driven, thereby increasing the life of the fuel pump, and thus repair and replacement It is an object of the present invention to provide a cost-effective side feed in-line Elpji external fuel pump.

In addition, according to the present invention, the case is formed to install the housing therein, and the partition wall is installed inside the case, thereby reducing the heat load by cooling the high-temperature lpig fuel discharged through the outlet of the housing, thereby reducing the fuel. Another object of the present invention is to provide an external ellipse fuel pump for side-feeding that improves durability of an apparatus for receiving Elpgi fuel from a pump.

In addition, the present invention is to provide a fuel pump for the side feed in-line Elpji external fuel pump in which the L-Phigi fuel is introduced to the side and transported inline by the roller vane, the suction is good at the inlet, thereby improving the efficiency of the inlet flow. There is another purpose.

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 housing comprising an inlet formed at a side thereof and an outlet formed at one end thereof for introducing / draining the LLP fuel;

A pumping part formed at an inlet side of the housing to introduce the LLP fuel into the housing;

A first shaft connected to the pumping part and integrally formed with a ball so that the pumping part is driven, a second shaft formed on an opposite side of the first axis and supported at an outlet side of the housing, It relates to a side-feeding in-line Elpji external fuel pump, characterized in that comprises an electric motor consisting of an electric motor connected between the two axes to generate a rotational force by electricity.

As described above, the side feed in-line LLP external fuel pump of the present invention is provided with bushings on the first and second shafts of the motor so as to be fixed inside the housing, and to prevent the motor from shaking due to the bushing. By fully engaging the ball integrally at the end and inserting the ball at the end of the second shaft, the motor is fixed, thereby reducing durability due to abrasion of the bushing, the pumping part, and the housing even when the LLP fuel is introduced. Etc., it is possible to prevent the increase in the life of the fuel pump, thereby reducing the cost of repair and replacement.

In addition, the present invention is the case is formed to install the housing therein, the partition is installed in the interior of the case, the heat load is reduced by cooling the high-temperature lpig fuel discharged through the outlet of the housing, thereby reducing the fuel pump In the effect of improving the durability of the device receiving the LPG fuel is delivered.

In addition, the present invention has the effect that the L-PGE fuel is introduced into the side and transported inline by the roller vane, so that the L-PGE fuel is good suction at the inlet, thereby improving the efficiency of the inlet flow.

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 housing comprising an inlet formed at a side thereof and an outlet formed at one end thereof for introducing / draining the LLP fuel;

A pumping part formed at an inlet side of the housing to introduce the LLP fuel into the housing;

A first shaft connected to the pumping part and integrally formed with a ball so that the pumping part is driven, a second shaft formed on an opposite side of the first axis and supported at an outlet side of the housing, It consists of an electric motor connected between the two axes to generate a rotational force by electricity, characterized in that it comprises a motor unit installed in the housing.

In addition, the pumping unit of the present invention is characterized in that the fuel transfer portion is formed to be connected to the first shaft of the motor portion to inject the LP oil into the interior through the inlet of the housing to the outlet of the housing.

In addition, the fuel transfer unit of the present invention, the roller vane is connected to the first shaft of the motor unit, rotated by the first shaft to inject the LLP fuel through the inlet of the housing to transfer the inside of the housing;

A roller formed to surround an outer circumferential surface of the roller vane;

A first plate disposed on one side of the roller vane and having a fan-shaped inlet groove formed at both lower ends thereof so that the LPV fuel introduced by the roller vane flows in the lateral direction;

Is disposed on the other side of the roller vane, the conveying hole is formed to be bent so as to transfer the inflow of the lpji fuel introduced into the vertical plate by the inlet groove of the first plate, the first shaft is penetrated through the roller And a second plate having a through hole formed at a central portion thereof to be coupled to the vane.

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 an external type ellipse fuel pump according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing an external type ellipse fuel pump according to an embodiment of the present invention, Figure 3 is 4 is an enlarged cross-sectional view showing a portion A, Figure 4 is a cross-sectional view showing the axis in which the ball is inserted according to an embodiment of the present invention, Figure 5 is a perspective view showing a first plate according to an embodiment of the present invention.

As shown in FIG. 1 and FIG. 2, the external LPP fuel pump 100 of the present invention includes a housing 10, a pumping unit 20, a motor unit 30, and a case 50. do.

The housing 10 includes an inlet 11 formed at one end of a side portion and an outlet 12 formed at one end of an end portion of the housing 10 for inflow / ejection of the LLP fuel. The inlet 11 is connected to a fuel tank (not shown), and the outlet 12 of the housing 10 is connected to a fuel injector (not shown) of the engine.

That is, the fuel pump 100 according to the embodiment of the present invention is an external fuel pump installed in a fuel line connecting the fuel tank and the fuel injector.

Here, a space is formed in the inlet 11 side of the housing 10 so that the pumping unit 20 is installed, and another space is formed in the outlet 12 side so that the motor unit 30 can be installed. do. At this time, the guide film 13 is formed to divide the internal space of the housing 10 into the pumping unit 20 side and the motor unit 30 side, the LP film through the pumping unit 20 in the guide film 13 A fuel passage 14 is formed to transfer fuel to the motor unit 30, and the fuel passage 14 has a constant angle so that the LLP fuel is smoothly transferred to the motor unit 30 by the rotation of the pumping unit 20. Is formed.

Referring to FIG. 5, the pumping unit 20 is connected to the first shaft 32 of the motor unit 30, and rotated by the first shaft 32 to open the inlet 11 of the housing 10. A roller vane 21 for introducing the LPI fuel to be transferred to the inside of the housing 10, a roller 24 formed to surround the outer circumferential surface of the roller vane 21, and one side of the roller vane 21. The first plate 22 and the roller vane 21 are formed in the inlet groove 25 of the fan-shaped portion formed on both sides of the lower end so that the LPI fuel introduced by the roller vane 21 is introduced in the lateral direction, Is disposed on the other side of the conveyance hole 26 is formed to be bent so as to transport the inflow of the L-PGE fuel introduced in the vertical direction by walking the inlet groove 25 of the first plate 22 by the roller vane 21 is formed , A second plate having a through hole 27 formed in a central portion thereof such that the first shaft 32 penetrates and is coupled to the roller vane 21. It consists of 23. In this case, the roller vanes 21 may also be used in a gear rotor method.

In addition, the roller vane 21 is connected to the first shaft 32 of the motor unit 30 is driven to rotate by the first shaft 32, the first shaft 32 is the roller vane 21 The end portion is in contact with the first plate 22. At this time, the ball is completely integrally coupled to the end of the first shaft 32 so that the end of the first shaft 32 is formed in a round arc shape, the end of the round arc shape of the first shaft 32 Due to the negative, when the first shaft 32 is rotated, the friction with the first plate 22 can be reduced, thereby preventing wear and damage. In addition, a groove (not shown) is formed at one end of the first plate 22 in contact with the end of the first shaft 32 such that the first shaft 32 is not spaced apart from the left and right sides.

In addition, the pumping unit 20 sequentially laminates and combines the second plate 23, the roller 24, the roller vanes 21, and the first plate 22, and then is separated from the outside or inside the housing 10. It is sealed by the cover 28 as a finish so that the introduced LLP fuel is not discharged to the outside other than the outlet 12.

The motor unit 30 is connected to the pumping unit 20 so that the pumping unit 20 is driven so that the first end 32 is formed integrally with the ball, and formed on the opposite side of the first shaft 32 And an electric motor connected between the second shaft 36 supported on the outlet 12 side of the housing 10 and the first shaft 32 and the second shaft 36 to generate rotational force by electricity. It consists of 31 is installed in the housing (10).

Here, of course, any actuator may be used in addition to the electric motor 31. In addition, the electric motor 31 includes a permanent magnet 34 and a rotor 33 disposed in a magnetic field region generated by the permanent magnet 34. Since the electric motor 31 is obvious to those skilled in the art, the detailed description thereof will be omitted.

In addition, the first and second shafts 32 and 36 are formed to protrude to both sides of the electric motor 31 by a predetermined interval, and the first shaft 32 to fix the electric motor 31 inside the housing 10. The guide membrane 13 is installed through the second shaft 36, and one side of the second shaft 36 is inserted into the housing 10 of the outlet 12 at a predetermined interval to fix the electric motor 31. At this time, the bushing 40 is fitted to the outer circumferential surfaces of the first and second shafts 32 and 36 in contact with the housing 10 so that the first and second shafts 32 and 36 are rotated, thereby reducing the friction to the minimum. Make it smooth. At this time, the bushing 40 is obvious to those skilled in the art to which the present invention pertains, and thus a detailed description thereof will be omitted.

Here, the bushing 40 is installed on the outer circumferential surface of the housing 10 and the first and second shafts 32 and 36, but is not fixed, so that the bushing 40 is rotated when the first and second shafts 32 and 36 are rotated. By being spaced apart at regular intervals from the housing 10, no wear occurs between the bushing 40 and the housing 10. Accordingly, the durability of the fuel pump 100 is improved to increase the life of the fuel pump 100.

However, at this time, referring to FIGS. 3 and 4, when the bushing 40 is spaced apart, the electric motor 31 and the first and second shafts 32 and 36 of the motor unit 30 may not be fixed while being shaken. In order to prevent this, the ball 35 is inserted into the end portion of the second shaft 36 (a portion in contact with the housing 10 of the outlet port 12 side), and the ball 35 is inserted into the The ball 35 is not fixed to minimize friction with the housing 10 during rotation of the two shafts 36. A coupling groove 36a is formed at the end of the second shaft 36 so that the ball 35 can be inserted therein.

As such, the ball 35 is inserted into the end of the second shaft 36 to prevent the electric motor 31 and the second shaft 36 of the motor unit 30 from shaking, and also the motor shaft. And wear of the housing 10 can be reduced.

In addition, an insertion groove 15 is formed in the inner surface of the outlet 12 side housing 10 in accordance with the ball 35 inserted into the end of the second shaft 36 so that the ball 35 is not separated. Prevent it.

Here, the ball 35 is inserted to be detachably attached to the end of the second shaft 36 or attached in various ways, such as being fixed integrally with the second shaft 36.

In addition, the ball 35 may selectively use any one of silicon carbide (SIC), alumina (Al₂O₃), and zirconia (ZrO₂) material identical to the first and second axes 32 and 36 of the motor unit 30. have.

The case 50 has a hollow interior to install the housing 10 therein, and between the case 50 and the housing 10 passes through the pumping unit 20 and the motor unit 30 to provide a housing ( Cooling the hot high temperature Elji fuel discharged through the outlet 12 of 10) to reduce the heat load of the Elji 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, the partition wall 52 is formed inside the case 50 to circulate the high temperature LPI fuel in various ways, and the partition wall is supported on the inner surface of the case 50 and the outer surface of the housing 10. And guides the LPI fuel.

6 is an enlarged cross-sectional view illustrating a housing in which a ball is integrally formed according to a second exemplary embodiment of the present invention.

As shown in FIG. 6, the ball 35 is integrally coupled to the central portion of the outlet 10 side housing 10 to be in contact with the end portion of the second shaft 36, and to the ball 35. As a result, the second shaft 36 may be smoothly rotated. Here, the ball 35 is integrally attached when the housing 10 is manufactured.

Although the preferred embodiments of the present invention described above have been described, the present invention is not limited to the above embodiments, and can be easily changed by those skilled in the art from the embodiments of the present invention. It includes all changes and modifications to the extent deemed equivalent.

1 is a cross-sectional view showing an external fuel pump for LLP in accordance with an embodiment of the present invention.

Figure 2 is an exploded perspective view showing an external fuel pump for LLP in accordance with an embodiment of the present invention,

3 is an enlarged cross-sectional view illustrating a portion A of FIG. 1;

4 is a cross-sectional view showing an axis in which the ball is inserted according to an embodiment of the present invention,

5 is a perspective view showing a first plate according to an embodiment of the present invention,

6 is an enlarged cross-sectional view illustrating a housing in which a ball is integrally formed according to a second exemplary embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10 housing 11 inlet

12: outlet 13: guide film

14: fuel passage 15: insertion groove

20: pumping part 21: roller vane

22: first plate 23: second plate

24: roller 25: inflow groove

26: transfer hole 27: through hole

28: cover

30: motor unit 31: electric motor

32: 1st axis 33: rotor

34: permanent magnet 35: ball

36: 2nd axis 40: bushing

50: case 51: exit

52: bulkhead 100: fuel pump

Claims (11)

In the fuel pump for compressing and pumping the LPG (Liquefied Petroleum Gas, LPG) fuel, A housing (10) comprising an inlet (11) formed at the side and an outlet (12) formed at one end thereof for introducing / draining the LLP fuel; A pumping part (20) formed at an inlet (11) side of the housing (10) to introduce the LLP fuel into the housing (10); A first shaft 32 having an end portion integrally formed with a ball so as to be connected to the pumping unit 20 to drive the pumping unit 20, and formed on an opposite side of the first shaft 32 to form the housing 10. It consists of a second shaft 36 which is supported on the outlet 12 side of the electric motor 31 is connected between the first shaft 32 and the second shaft 36 to generate a rotational force by electricity A motor unit 30 installed inside the housing 10; Side feed for in-line LLP external fuel pump, characterized in that comprises a. The method of claim 1, wherein the pumping unit 20, It is connected to the first shaft 32 of the motor unit 30, is rotated by the first shaft 32 to inject the LLP fuel through the inlet 11 of the housing 10 into the interior of the housing 10 Roller vanes 21 for conveying; A roller 24 formed to surround the outer circumferential surface of the roller vane 21; The first plate 22 is disposed on one side of the roller vane 21, and the inlet groove 25 having a fan-shaped shape is formed at the lower end of both sides such that the LPI fuel introduced by the roller vane 21 flows in the lateral direction. )Wow; The transfer hole is disposed on the other side of the roller vane 21, and is formed to be bent so as to transfer the inflow LP 25 of the first plate 22 by the roller vane 21 in a vertical direction. A second plate 23 having a 26 formed therein and a through hole 27 formed in a central portion thereof such that the first shaft 32 penetrates and is coupled to the roller vane 21; Side feed in-line elbow external fuel pump characterized in that it comprises a. The method of claim 2, The first plate 22 has a groove formed in the central portion in contact with the end portion of the first shaft 32 so that the first shaft 32 is not spaced apart from the left, right External fuel pump. The method of claim 1, The motor unit 30 is composed of an electric motor 31 for generating a rotational force by electricity, and the first and second shafts (32, 36) formed to pass through to transmit the rotational force of the electric motor 31, The bushing 40 is attached to the first and second shafts 32 and 36 in contact with the housing 10 such that the electric motor 31 is fixed inside the housing 10 and the first and second shafts 32 and 36 are rotated. Elbow external fuel pump for side feeding inline, characterized in that a plurality is installed. The method of claim 4, wherein The bushing 40 is installed in the housing 10 by penetrating the first and second shafts 32 and 36, and when the first and second shafts 32 and 36 are rotated, a predetermined interval in the housing 10. Side-feeding in-line elbow external fuel pump, characterized in that the wear does not space apart. The method of claim 1, The second shaft 36 is a ball at the end contacting the outlet 12 side housing so that the second shaft 36 is smoothly rotated while preventing the electric motor 31 is fixed in the housing 10, Side feed in-line LLP external fuel pump, characterized in that the insertion (35). The method of claim 6, An insertion groove 15 is formed on an inner surface of the housing 10 at the outlet 12 side in accordance with the ball 35 inserted into the end of the second shaft 36 to prevent the ball 35 from being separated. Elbow external fuel pump for side-feeding inline. The method of claim 6, The ball 35 is selectively used any one of the same silicon carbide (SIC), alumina (Al₂O₃), zirconia (ZrO₂) material as the first and second axes 32, 36 of the motor unit 30. Elbow external fuel pump for side feeding inline. The method of claim 1, In the central portion of the housing 10 of the discharge port 12 side, the ball 35 is in contact with the end of the second shaft 36 of the motor unit 30 so that the second shaft 36 rotates smoothly. Side feed in-line elbow external fuel pump, characterized in that coupled to the integral. The method of claim 1, The outside of the housing 10 passes through the pumping unit 20 and the motor unit 30 to reduce the heat load while cooling the high-temperature lpig fuel discharged through the outlet 12 of the housing 10 to be discharged to the outside Side feeding in-line elbow external fuel pump, characterized in that the case 50 is formed with a plurality of outlets 51 is formed. The method of claim 10, The case 50 has a hollow inside to install the housing 10 therein, and the partition 50 is formed inside the case 50 so as to circulate the high temperature LPI fuel by several branches to be cooled. Elbow external fuel pump for side feeding inline.

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