KR20050117712A - Directive operation oil pump - Google Patents

Abstract

The disclosed direct-acting oil pump includes a body and a cover which are coupled to each other to form a movement path including an inlet and an outlet of oil, a rotor rotatably installed between the sealing surface of the body and the cover, and accommodated in the path by rotating the rotor. It includes a crank shaft for advancing the oil in one direction, and each of the sealing surface of the body and the cover includes a groove formed to form an oil film for accommodating the oil to prevent the inflow of air. The oil pump of such a configuration is provided with grooves for accommodating oil on the sealing surfaces of the body and the cover, and blocks the inflow of external air due to wear of the crankshaft and the oil seal by an oil film made by the oil contained in the groove, By converting the solid friction between the sealing surface and the rotor into fluid friction, it is possible to prevent the HLA sponge phenomenon and to reduce wear and noise.

Description

Direct operation oil pump

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct driven oil pump, and more particularly to a direct driven oil pump that forms grooves in the sealing surface to prevent air from entering the oil pump and reduces noise. It is about.

In general, the engine has a sliding part such as a cylinder and a piston or a rotating part such as a crank shaft and a cam shaft. The frictional heat is generated, the friction surface becomes rough, and the engine wears out quickly. Therefore, in order to prevent this, when oil is injected into the friction surface of the metal, an oil film is formed therebetween so that the solid friction is changed to the fluid friction of the oil, thereby reducing the frictional resistance. Thus, the lubrication apparatus is provided in order to supply oil to a kinetic friction part. The lubrication device is composed of an oil pan, an oil pump, an oil filter, etc. Among these, the oil pump sucks and pressurizes the oil in the oil pan and sends it to each lubrication unit.

As the oil pump used for such an oil supply, the structure as shown in FIG. 1 and FIG. 2 was generally employ | adopted conventionally. 1 is an exploded perspective view illustrating an oil pump, and FIG. 2 is a cross-sectional view taken along line II of FIG. 1.

As shown in FIG. 1, the oil pump includes a housing 10, a body 20 formed in the housing 10, a cover 30 covering the body 20, and a body 20 and a cover. It consists of a rotor 40, 50 is installed between the (30).

First, the body 20 includes a sealing part 25, a suction part 26 formed at one side of the sealing part 25, and a discharge part 27 formed at the other side of the sealing part 25.

The sealing portion 25 has a sealing surface 22 is formed on the bottom, the fastening hole 21 is coupled to the crank shaft 60 is formed in the center of the sealing surface 22. Here, the sealing surface 22 is formed higher than the suction portion 26 and the discharge portion 27, to prevent the oil from flowing back from the discharge portion 27 in the high pressure state to the suction portion 26 in the low pressure state. To this end, it extends to both sides of the inner circumferential wall surrounding the sealing surface 22 to block the suction part 26 and the discharge part 27. The oil seal 24 is coupled to the outside of the wall of the fastening hole 21 to seal the space between the fastening hole 21 and the crankshaft 60 inserted into the fastening hole 21. Shut off the inflow.

The suction part 26 is formed at one side of the sealing part 25 to serve as a path for sending the oil sucked from the oil pan to the sealing part 25.

The discharge part 27 serves as a path for supplying oil supplied from the sealing part 25 to each lubrication part (not shown) through the discharge port 28.

Next, the cover 30 covering the body 20 is a sealing surface 32, a suction part 33 formed on one side of the sealing surface 32, and a discharge part 34 formed on the other side of the sealing surface 32. And a fastening hole 31 to which the crankshaft 60 is coupled to a center of the sealing surface 32, and a sealing surface (to prevent oil backflow between the suction part 33 and the discharge part 34). 32 is further extended to both sides of the inner circumferential wall surface surrounding the inlet part 33 and the inlet part 33 and the outlet part 34. In addition, a suction pipe 35 to which the oil pan and the moving line are connected is formed at the suction part 33 side.

Finally, the rotors 40 and 50 are installed between the body 20 and the sealing surfaces 22 and 32 of the cover 30, and consist of the outer rotor 40 and the inner rotor 50.

The outer rotor 40 is fitted to the inner circumferential wall surface 23 of the sealing portion 25 of the body 20, and the convex portion 41 and the concave portion 42 are alternately formed on the inner wall surface.

The inner rotor 50 has a fastening hole 53 to which the crankshaft 60 is coupled, and a convex portion 51 and a concave portion 52 are formed on the outer wall thereof, so that the outer rotor 40 has an inner rotor 50. Eccentrically coupled to the inner wall surface. That is, the inner wall 50 convex portion 51 of the inner wall surface concave portion 42 of the outer rotor 40 or the inner wall 50 convex portion 41 of the inner wall surface convex portion 41 of the outer rotor 40 outer wall surface. The concave portion 52 is eccentrically coupled in a manner to be fitted.

In the oil pump having such a structure, when the pressure in the oil pump is lowered, the oil is sucked into the suction parts 26 and 33 through the oil suction pipe 35. The oil sucked in this way is sent to the outlets 27 and 34 by the rotors 40 and 50 and discharged through the outlets 28. Here, the principle that the oil is sent to the discharge portion 27, 34 by the rotor 40, 50 is the volume space between the inner rotor 50 and the outer rotor 40 eccentrically fitted to the outer rotor 40 Oil enters from the suction part 26 and 33 and rotates with the volume space according to the rotation of the crankshaft 60 to discharge the oil through the discharge part 28 via the discharge part 27 and 34. do.

However, when the crank shaft and the oil seal are worn out, the oil pump having such a structure causes a problem in that external air flows into the oil pump, causing a sponge in the HLA (Hydraulic valve Lash Adjust), thereby degrading engine performance. there was.

In addition, the body and the cover is in contact with the rotor has a problem that a lot of noise due to friction as the crank shaft rotates.

Therefore, there is a need for a new oil pump that can solve the above problems.

The present invention has been made in view of the above necessity, and an object thereof is to provide an improved oil pump to prevent air from flowing into the oil pump even if the crankshaft and the oil seal are worn.

In addition, another object of the present invention is to provide an oil pump that can prevent noise, abrasion, etc. due to friction between the rotating rotor and the portion in contact with the rotating rotor.

The present invention for achieving the above object, the body and the cover are coupled to each other to form a movement path including the inlet and outlet of the oil, a rotor rotatably installed between the sealing surface of the body and the cover, the rotor In the direct-drive oil pump including a crank shaft for advancing the oil contained in the path in one direction by rotating a, in the sealing surface of the body and cover each of the grooves to receive the oil to form an oil film to prevent the inflow of air Characterized in that formed.

Here, the groove is preferably formed along the circumference of the fastening hole into which the crank shaft is inserted.

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

3 is an exploded perspective view of the oil pump according to the present invention, FIG. 4 is a plan view combining the body and the rotor of FIG. 3, and FIG. 5 is a sectional view taken along the line II-II of FIG. 3.

Referring to the drawings, the oil pump is composed of a body 110 and a cover 120 covering the body 110 and rotors 130 and 140 installed between the body 110 and the cover 110.

First, the body 110 formed in the housing 100 includes a sealing part 112, a suction part 111 formed at one side of the sealing part 112, and a discharge part 117 formed at the other side of the sealing part 112. .

A sealing surface 113 is formed at the bottom of the sealing portion 112, and a fastening hole 119 to which the crankshaft 150 is coupled to a central portion of the sealing surface 113 is formed, and the sealing surface 113 is formed. Is formed somewhat higher than the bottom of the suction unit 111 and the discharge unit 117. In addition, the sealing surface 113 is interposed between the suction part 111 and the discharge part 117 so that oil in the low pressure suction part 111 and the high pressure discharge part 117 does not flow back due to the pressure difference. have. In addition, a groove 114 is formed on the sealing surface 113 to receive oil supplied from the suction part 111, and the received oil forms an oil film as shown in FIG. 5. The oil seal 116 is coupled to the outer wall of the fastening hole 119 to prevent external air from flowing between the fastening hole 119 and the crank shaft 150 inserted into the fastening hole 119. . Here, the oil film formed by the oil contained in the groove 114 serves to block the crankshaft 150 or wear the oil seal 116 to prevent air from entering the oil pump from the outside between the worn gaps. . In addition, by replacing the solid friction between the rotor 130, 140 and the sealing surface 113, which is installed and rotated on the sealing surface 113 to be described later to the fluid friction of the rotor 130, 140 and the sealing surface 113 May slow wear Thus, when the oil film is formed to prevent the intake of air into the oil pump, it is possible to prevent the sponge phenomenon of the HLA to prevent the engine performance degradation, and to reduce the noise by reducing the solid friction between the metals.

The suction part 111 is formed at one side of the sealing part 112 to suck oil from an oil pan (not shown).

The discharge part 117 is formed at the other side of the sealing part 112 to supply oil to each part through the discharge port 118.

Next, the cover 120 covers the body 110, similarly to the body 110, the sealing part 122, the suction part 121 and the sealing part 122 formed at one side of the sealing part 122. It includes a discharge portion 126 formed on the other side.

The sealing portion 122 also has a sealing surface 123 is formed on the bottom, and prevents the back flow of oil by blocking between the suction portion 121 and the discharge portion 126. A fastening hole 128 into which the crankshaft 150 is inserted is also formed in the center portion of the sealing surface 123, and a groove 124 is formed to receive oil introduced from the suction part 121. The oil contained in the groove 124 also forms an oil film to generate fluid friction with respect to the cover 120 when the rotors 130 and 140 rotate.

The suction part 121 has a suction pipe 127 formed on one side, and serves as a path for sending the oil introduced from the oil pan through the suction pipe 127 to the sealing part 122.

The discharge part 126 serves as a path for sending oil sent from the sealing part 122 to each lubrication part.

Lastly, the rotors 130 and 140 are formed of an outer rotor 130 and an inner rotor 140, and are rotatable between the body 110 and the sealing surfaces 113 and 123 of the cover 120. Is installed.

The outer rotor 130 has convex portions 131 and concave portions 132 alternately formed on inner wall surfaces thereof.

The inner rotor 140 has convex portions 141 and concave portions 142 sequentially formed on the outer wall surface, and concave portions of the outer wall surface of the inner rotor 140 on the convex portions 131 of the inner wall surface of the outer rotor 130. 142 is eccentrically coupled. That is, the inner wall 140 convex portion 132 of the inner wall concave portion 132 of the outer rotor 130 or the inner wall convex portion 131 of the inner rotor 140 outer wall surface of the inner wall convex portion 131 of the outer rotor 130. The concave portion 142 is eccentrically coupled in the form of fitting. In addition, a fastening hole 143 into which the crankshaft 150 is inserted is formed at the center portion of the inner rotor 140.

According to such a direct-drive oil pump, the oil introduced from the oil pan through the oil suction pipe 127 enters the suction parts 111 and 121 of the oil pump. The oil in the suction parts 111 and 121 flows into the rotors 130 and 140 that rotate together with the rotation of the grooves 114 and 124 formed on the sealing surfaces 113 and 123 and the crank shaft 150. Is sent. The oil contained in the grooves 114 and 124 of the sealing surfaces 113 and 123 forms an oil film, and the oil sent into the rotors 130 and 140 is eccentric between the outer rotor 130 and the inner rotor 140. And are received in the volumetric space created by the coupling and are sent to the discharge parts 117 and 126. The oil sent to the discharge parts 117 and 126 is sent to each part of the lubrication device through the discharge port 118. Therefore, the oil having the oil film formed in the grooves 114 and 124 blocks the air that may be introduced from the outside due to the wear of the crank shaft 150 or the oil seal 116 to prevent the sponge phenomenon of the HLA. And, by changing the solid friction between the sealing surface 113, 123 and the rotor 130, 140 to the fluid friction serves to reduce wear and noise.

As described above, according to the oil pump of the present invention, the groove formed on the sealing surface receives oil to form an oil film, thereby preventing external air inflow due to abrasion of the crankshaft and the oil seal, thereby preventing HLA sponge phenomenon, By converting the solid friction between the sealing surface and the rotor into fluid friction, it reduces wear and noise, thus preventing the engine from degrading.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings and that many more modifications and variations are possible within the scope of the following claims.

1 is an exploded perspective view showing a conventional direct-drive oil pump,

2 is a cross-sectional view taken along line II of FIG. 1;

3 is an exploded perspective view showing a direct-drive oil pump according to the present invention;

4 is a plan view showing a state in which the body and the rotor of FIG. 3 are coupled;

5 is a cross-sectional view taken along line II-II of FIG. 3.

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

100 ... housing 110 ... body

111, 121 ... suction 112, 122 ... sealing

113, 123 ... sealing side 114, 124 ... groove

116 ... oil seal 117, 126 ... outlet

118 ... outlet 120 ... cover

122 ... oil suction line 130 ... outer rotor

140 ... inner rotor

Claims (2)

A body and cover coupled to each other to form a movement path including an inlet and an outlet of oil, a rotor rotatably installed between the sealing surface of the body and the cover, and oil contained in the path by rotating the rotor in one direction. In a linearly driven oil pump comprising a crankshaft that proceeds to Each of the sealing surface of the body and the cover is a direct drive oil pump, characterized in that the groove is formed to form an oil film for preventing the inflow of air by receiving oil. The method of claim 1, And said groove is formed along a circumference of a fastening hole into which the crank shaft is inserted.