KR100880949B1 - Fuel pump for lpg fuel - Google Patents

Abstract

An inline LPG fuel pump is provided to prevent the deterioration due to the wear of bushing and pumping units and housing inside even if the LPG fuel enters therein during the operation of motor. An inline LPG fuel pump comprises a housing(10) in which an inlet(11) and an outlet(12) are formed on both sides in order to let LPG fuel in and out, a pumping unit(20) inducing the LPG fuel into the housing at the inlet of the housing, and a motor unit(30) which is installed inside the housing and operates the pumping unit. The motor unit includes a first axis(32) whose tip end is integrally formed with a ball(35), a second axis(36) supported on the outlet side of the housing, and an electric motor(31) connected between the first axis and the second axis.

Description

In-line ELPJI External Fuel Pump {Fuel Pump for LPP Fuel}

The present invention relates to an in-line elbow external fuel pump, and more particularly, a bushing is installed on the first and second shafts of the motor to be fixed inside the housing, and the end of the first shaft is prevented from shaking by the bushing. The ball is integrally combined with the ball and the ball is inserted into the end of the second shaft to fix the motor. It is possible to prevent the increase in the life of the fuel pump, and thus relates to an in-line elliptical external fuel pump for reducing the cost of repair and replacement.

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 an in-line ellipse external fuel pump which reduces cost.

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 having inlets and outlets formed at both sides for introducing / exhausting 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 an in-line external Elpji 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 in-line LLP external fuel pump of the present invention is provided with bushings on the first and second shafts of the motor to be fixed inside the housing, and the end of the first shaft to prevent the motor from shaking due to the bushing. The ball is integrally combined with the ball and the ball is inserted into the end of the second shaft to fix the motor. It can be prevented to increase the life of the fuel pump, thereby reducing the cost of repair and replacement.

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 having inlets and outlets formed at both sides for introducing / exhausting 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 roller vane is connected to the first shaft of the motor unit so that the LLP fuel is introduced into the interior through the inlet of the housing.

In addition, the outside of the roller vane of the present invention is characterized in that the case is further formed to drive smoothly to prevent shaking and wear when driving from the inside of the pumping portion.

In addition, the motor unit of the present invention is composed of an electric motor for generating a rotational force by electricity, and the first and second shafts are formed to pass through to transmit the rotational force of the electric motor, the electric motor is fixed inside the housing A plurality of bushings are installed on the first and second shafts in contact with the housing such that the first and second shafts rotate.

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 fuel pump for LLP according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view showing a portion A of Figure 1, Figure 3 is a ball inserted according to an embodiment of the present invention A cross section showing the axis.

As shown, the external LPP fuel pump 100 of the present invention includes a housing 10, a pumping unit 20, and a motor unit 30.

The housing 10 has an inlet 11 and an outlet 12 formed at both sides to inlet / exhaust the LLP fuel, and a fuel tank (not shown) at the inlet 11 of the housing 10. 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.

The pumping unit 20 is installed in a space formed at the inlet 11 side of the housing 10 so as to introduce the LPG fuel into the housing 10 through the fuel passage 14 of the guide membrane 13. (roller vane, 21).

In this case, a roller vane 21 or a gear rotor method formed in the pumping unit 20 may also be used, and the motor unit 30 inside the pumping unit 20 outside the roller vane 21. When driven by the first shaft 32 of the case, the case 22 is further formed so as to smoothly drive by preventing shaking.

Here, the roller vanes 21 are driven by being connected to the first shaft 32 of the motor unit 30, the first shaft 32 is coupled to the roller vanes 21 so that the end is connected to the case 22. In this case, the ball is completely integrally coupled to the end of the first shaft 32 so that the end of the first shaft is formed into a rounded arc, and the rounded arc of the first shaft 32 is formed. Due to this, when the first shaft 32 rotates, friction with the case 22 may be reduced, and wear and the like may be prevented. At this time, a groove (not shown) is formed at one end of the case 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.

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.

At this time, however, 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. The ball 35 is inserted into the end portion (part of contact with the outlet 10 side housing 10) of the 36, the ball 35 is inserted into the housing when the second shaft 36 is rotated The ball 35 is not fixed to minimize friction with the 10. 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 can be reduced.

In addition, an insertion groove 15 is formed on the inner surface of the outlet-side housing in accordance with the ball 35 inserted into the end of the second shaft 36 to prevent the ball 35 from being separated.

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.

4 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. 4, the ball 35 is integrally coupled to the central portion of the housing 10 at the outlet 12, and is in contact with the end of the second shaft 36. The second shaft 36 can be rotated smoothly. 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 that are deemed to be equivalent.

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

FIG. 2 is an enlarged cross-sectional view illustrating part A of FIG. 1;

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

4 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: case

30: motor unit 31: electric motor

32: 1st axis 33: rotor

34: permanent magnet 35: ball

36: second axis

40: bushing 100: fuel pump

Claims (9)

In an in-line fuel pump that compresses and pumps Liquefied Petroleum Gas (LPG) fuel, A housing (10) having inlets (11) and outlets (12) formed at both sides for inlet / outlet of 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 And a motor unit 30 installed inside the housing 10, and the guide layer 13 is configured to divide the internal space of the housing 10 into the pumping unit 20 side and the motor unit 30 side. The fuel flow path 14 is formed in the guide film 13 so that the LLP fuel is transferred to the motor part 30 through the pumping part 20, and the fuel flow path 14 is formed of the pumping part 20. It is formed at a predetermined angle so that the LLP fuel is smoothly transferred to the motor unit 30 by rotation, The vane 21 is formed in the pumping part 20 so as to be connected to the first shaft 32 of the motor part 30 so that the LPI fuel is introduced into the housing through the inlet 11 of the housing 10. Outside the roller vane 21, the case 22 is further formed to drive smoothly to prevent shaking and abrasion when driving in the pumping unit 20, the first shaft 32 is not spaced apart left and right The groove is formed in one end of the case 22 in contact with the end of the first shaft 32, Bushing 40 in 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 so that the first and second axes 32 and 36 are rotated. Are installed The second shaft 36 has a ball 35 at an end contacting the outlet side housing so that the second shaft 36 rotates smoothly while the electric motor 31 is fixed in the housing 10 and prevents shaking. Is inserted, the insertion groove 15 is formed in the outlet side housing so that the ball 35 inserted into the end of the second shaft 36 is not separated, the ball 35 of the motor portion 30 In-line elbow external fuel pump, characterized in that selectively using any one of the same silicon carbide (SIC), alumina (Al₂O₃), zirconia (ZrO₂) material as the first and second axes (32, 36). The method of claim 1, 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. In-line elbow external fuel pump, characterized in that the wear does not space apart. 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. In-line elbow external fuel pump, characterized in that coupled to the integral. delete delete delete delete delete delete

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