KR200361470Y1 - Oil pump for noise reduction - Google Patents

Abstract

The disclosed noise reduction 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 the rotor by rotating the rotor. It includes a crank shaft for advancing the received oil in one direction, the body and the cover portion facing the rotor, it is configured to include a groove for receiving the oil introduced from the suction portion to form an oil film. The noise reduction oil pump having such a configuration may provide an effect of reducing noise, wear, driving torque, and the like because oil is received in the grooves formed inside the body and the cover to form an oil film to generate fluid friction.

Description

Oil pump for noise reduction

The present invention relates to an oil pump, and in particular, to form an oil film on the body and the cover to reduce noise, abrasion, driving torque, etc., caused by the rotation of the rotor installed between the body and the cover. It is about.

In general, engines have sliding parts such as cylinders and pistons, or rotating parts such as crank shafts or cam shafts. Direct contact generates frictional heat, and the friction surface becomes rough, causing rapid wear or sticking and failure of the engine. 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 was generally employ | adopted conventionally. 1 is an exploded perspective view showing an oil pump.

Referring to the drawings, the oil pump includes a body 10, a cover 20 covering the body 10, and a rotor 30 installed between the body 10 and the cover 20 ( 40).

The body 10 includes a sealing unit 15, a suction unit 16 formed at one side of the sealing unit 15, and a discharge unit 17 formed at the other side of the sealing unit 15.

The sealing portion 15 has a sealing surface 12 is formed on the bottom, the fastening hole 11 is coupled to the crank shaft 50 is formed in the center of the sealing surface 12. In addition, the suction oil groove 13 and the discharge oil groove 14 are formed in the suction part 16 side and the discharge part 17 side of the sealing surface 12, respectively, so that the volume space of the rotors 30 and 40 to be described later. Oil is supplied by the pressure difference or oil received from the volume space is received. The sealing surface 12 is interposed between the suction oil groove 13 and the discharge oil groove 14 in order to prevent backflow of oil due to the pressure difference between the discharge part 17 and the suction part 16.

The suction part 16 is formed at one side of the sealing part 15 and serves as a path for sending oil sucked from an oil pan (not shown) to the sealing part 15.

The discharge part 17 serves as a path for supplying oil supplied from the sealing part 15 to each lubrication part (not shown), and an outlet 18 is formed on an upper surface thereof.

Like the body 10, the cover 20 includes a sealing part 23, a suction part 24, and an outlet part 26, and has a crank shaft in the center of the sealing surface 22 of the sealing part 23. A fastening hole 21 to which 50 is coupled is formed, and a sealing surface 22 is blocked in order to prevent oil backflow between the suction part 24 and the discharge part 26. In addition, a suction pipe 25 which is immersed in the oil pan is connected to the suction part 24, and supplies oil from the oil pan to the suction part 24 by a pressure difference.

The rotors 30 and 40 are rotatably installed between the body 10 and the sealing surfaces 12 and 22 of the cover 20, and consist of an outer rotor 30 and an inner rotor 40.

In the outer rotor 30, convex portions 31 and concave portions 32 are alternately formed on the inner wall surface.

The inner rotor 40 has a fastening hole 43 to which the crankshaft 50 is coupled at the center thereof, and a convex portion 41 and a concave portion 42 are alternately formed on the outer wall thereof so that the outer rotor 30 is formed. Eccentrically coupled to the inner wall of the. This eccentric coupling is coupled in such a manner that the outer wall convex portion 41 of the inner rotor 40 is fitted to the inner wall concave portion 32 of the outer rotor 30.

Thus, the eccentrically coupled inner rotor 40 and the outer rotor 30 rotate together with the rotation of the crankshaft 50 to advance the oil contained in the volume space created by the eccentric coupling in one direction.

The oil pump having such a structure is supplied with oil by the pressure difference between the oil pump and the oil pan through the suction pipe 25 which is immersed in the oil pan into the suction portions 16 and 24. The oil supplied in this way is sent to the suction oil groove 13 of the sealing parts 15 and 23, and the oil of the suction oil groove 13 is eccentrically coupled by the outer rotor 30 and the inner rotor 40. Is sent to the created volume space. In addition, the rotors 30 and 40 are also rotated together by the rotation of the crank shaft 50 coupled to the fastening holes 11 and 21 of the sealing surfaces 12 and 22 so that the oil in the discharge oil groove 14 is increased. To supply. The oil contained in this discharge oil groove 14 is sent to the discharge part 17, and the discharge part 17 supplies oil to each lubrication part through the discharge port 18.

However, in the conventional oil pump, a rotor is installed between the body and the cover, and when the rotor rotates for oil supply, the rotor contacts the inner circumferential wall surface and the sealing surface of the body and the sealing surface of the cover to generate metal friction. This metal friction has a problem that noise, wear and driving torque become large.

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

The present invention was created in view of the above necessity, and an object thereof is to provide an improved oil pump to reduce noise, wear, driving torque, and the like during rotation of a rotor.

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

2 is an exploded perspective view showing an oil pump according to the present invention,

3 is a cross-sectional view of the body taken along line II of FIG. 2.

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

100 ... body 110, 210 ... sealing part

111, 211, 430 ... Fastening hole 112, 212 ... Sealing face

113. Inner wall 114. Suction oil groove

115 ... Exhaust oil groove 116 ... Inner wall of tightening hole

117, 213 ... Groove 120, 220 ... Suction unit

130, 230 ... outlet 131 ... outlet

200 ... cover 221 ... suction line

300 ... outer rotor 400 ... inner rotor

The present invention for achieving the above object is a body and cover 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 An oil pump comprising a crank shaft for advancing oil contained in the path in one direction by rotating the oil pump, wherein the body and the cover portion facing the rotor receive oil introduced from the suction unit to form an oil film. A groove is formed.

Here, the groove is preferably formed spirally in accordance with the rotation direction of the rotor.

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

Figure 2 shows an exploded perspective view of the noise reduction oil pump according to the present invention, the body 100, the cover 200 and the rotor 300, 400. Here, the body 100 and the cover 200 are coupled to each other to form a path through which oil is introduced and discharged, and the rotors 300 and 400 are sealing surfaces 112 of the body 100 and the cover 200 which will be described later. It is rotatably installed between the 212.

First, the body 100 has a sealing part 110, a suction part 120 formed at one side of the sealing part 110, and a discharge part 130 formed at the other side of the sealing part 110.

Here, the sealing part 110 is a cylindrical shape in which the suction part 120 side is open, the sealing surface 112 is formed on the bottom. A groove 117 is formed on a surface of the rotor 300 and 400 to be described later. That is, the sealing surface 112 and the inner circumferential wall surface 113 surrounding the sealing surface 112 have grooves 117 in which oil is accommodated, as shown in FIG. 3, at least along the rotational direction of the rotors 300 and 400. One or more are formed. Therefore, the oil contained in the sealing surface 112 and the groove 117 formed on the inner circumferential wall surface 113 surrounding the sealing surface 112 forms an oil film, thereby solid friction by rotation of the conventional body and the rotor installed on the body. Change to fluid friction. In addition, a fastening hole 111 to which the crankshaft 500 is coupled is formed at the central portion of the sealing surface 112. In addition, discharge oil grooves 115 and suction oil grooves 114 are formed at the discharge part 130 side and the suction part 120 side of the sealing surface 112 to accommodate oil to be discharged or sucked. The sealing surface 112 is interposed between the discharge oil groove 115 and the suction oil groove 114 to prevent the backflow of oil due to the pressure difference.

The suction part 120 is formed at one side of the sealing part 110 and serves as a path for sending oil sucked from an oil pan (not shown) to the sealing part 110.

The discharge unit 130 is formed on the other side of the sealing unit 110, the discharge port 131 is formed on the upper surface to supply the oil sent by the rotor 300, 400 to each lubrication unit (not shown) Serves as a path for

Next, the cover 200 also has a sealing part 210, a suction part 220 is formed at one side of the sealing part 210, and a discharge part 230 is formed at the other side. Here, a fastening hole 211 to which the crankshaft 500 is coupled is formed at the central portion of the sealing surface 212 of the sealing portion 210, and oil is provided at the sealing surface 212 facing the rotors 300 and 400. The number of grooves 213 accommodated therein is formed in accordance with the rotation direction of the rotors 300 and 400. The groove 213 also receives oil in the same way as the groove 117 formed on the sealing surface 112 of the body 100 to form an oil film by oil, and generates fluid friction. In addition, a suction pipe 221 which is locked to an oil pan is connected to one side of the suction unit 220 to suck oil from the oil pan.

Finally, the rotors 300 and 400 are formed of an outer rotor 300 and an inner rotor 400 rotatably installed between the body 100 and the sealing surfaces 112 and 212 of the cover 200. .

The outer rotor 300 has convex portions 310 and concave portions 320 alternately formed on inner wall surfaces thereof.

The inner rotor 400 has a fastening hole 430 to which the crankshaft 500 is coupled at the center thereof, and a convex portion 410 and a concave portion 420 are alternately formed on the outer wall of the outer rotor 300. Eccentrically coupled to the inner wall of the. The eccentric coupling is coupled in such a way that the outer wall convex portion 410 of the inner rotor 400 is fitted to the inner wall concave portion 320 of the outer rotor 300.

Accordingly, the eccentrically coupled inner rotor 400 and the outer rotor 300 rotate together with the rotation of the crankshaft 500 to advance the oil contained in the volume space created by the eccentric coupling in one direction.

In the noise reduction oil pump having such a structure, oil is introduced into the suction unit 120 and 220 through the suction tube 221 which is immersed in the oil pan. The oil flowing into the suction unit 120 and 220 is sent to the sealing unit 110 and 210 of the body 100 and the cover 200 to seal the surface 112 of the body 100 and the sealing surface ( It is received in the grooves 117 and 213 formed on the inner circumferential wall surface 113 and the sealing surface 212 of the cover 200 that surrounds the 112 to form an oil film, and is also sent to the rotors 300 and 400 to the inner side. It is accommodated in the volume space formed by the rotor 400 and the outer rotor 300 and sent to the discharge parts 130 and 230 by the rotation of the rotors 300 and 400.

Accordingly, the oil film formed on the grooves of the body and the cover changes solid friction between the body and the cover and the rotor generated by the rotation of the rotor to fluid friction by oil to reduce noise, reduce frictional wear, and reduce driving torque.

As described above, according to the noise reduction oil pump of the present invention, grooves are formed in the body and the cover, and an oil film is formed by the oil contained in the grooves so that the solid friction generated during the rotation of the conventional rotor is changed to the fluid friction. It also provides the effect of reducing wear and driving torque.

The invention is not limited to that described above and illustrated in the drawings, of course, more variations and modifications are possible within the scope of the claims set out below.

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. An oil pump comprising a crankshaft for advancing to The body and the cover portion facing the rotor, the noise reduction oil pump, characterized in that grooves are formed to receive the oil introduced from the suction portion to form an oil film. The method of claim 1, The groove is noise reduction oil pump, characterized in that formed in a spiral in accordance with the rotation direction of the rotor.