Vacuum pump of vehicle preventing lubricant from reintroducing for reducing operation noise

Patent metadata

Field	Value
Publication number	US-9328733-B2
Application number	US-201314104920-A
Country	US
Kind code	B2
Filing date	Dec 12, 2013
Priority date	Jul 9, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A vacuum pump of a vehicle for reducing operation noise may include a rotor rotating in a space defined by a housing formed in a pump body at an eccentric position relative to a center of the space, a vane installed to the rotor to rotate eccentrically in the space, and an oil outlet passing through the pump body and formed at a predetermined height above a lower limit of the space such that, when lubricant in the space is discharged in a pressurized state by the vane, the lubricant is not reintroduced back into the space by gravity.

First claim

What is claimed is:

1. A vacuum pump of a vehicle for reducing operation noise, comprising:
a rotor rotating in a space defined by a housing formed in a pump body at an eccentric position relative to a center of the space;
a vane installed to the rotor to rotate eccentrically in the space; and
an oil outlet passing through the pump body and formed at a predetermined height above a lower limit of the space such that, when lubricant having been introduced into the space is discharged in a pressurized state by the vane, the lubricant is not reintroduced back into the space by gravity,
wherein a back surface of the oil outlet opposite to an installation portion of the rotor and the vane is provided with a discharge valve which comprises:
a plate valve rotating by pressure of lubricant discharged through the oil outlet; and
a valve stopper limiting a rotation angle of the plate valve, wherein the valve stopper is formed on a surface of the discharge valve and has a vent groove, and
wherein the vent groove has a depth of 0.2 mm to 0.6 mm and a width of 1.2 mm to 1.6 mm.

2. The vacuum pump of claim 1 , wherein the oil outlet is formed above the center of the space and below an upper limit of the space.

3. The vacuum pump of claim 2 , wherein:
the housing is formed on an inside surface of the pump body and has a side groove formed adjacent to the oil outlet along a rotation direction of the vane; and
the vane passes through a front end of the side groove and then passes through a front end of the oil outlet, during rotation of the vane.

4. The vacuum pump of claim 3 , wherein an installation angular section of the side groove is greater than that of the oil outlet on the basis of the center of the space.

5. The vacuum pump of claim 3 , wherein an angle formed by a center of rotation of the rotor and both ends of the side groove is 77 degrees to 81 degrees.

6. A vacuum pump of a vehicle for reducing operation noise, comprising:
a rotor rotating in a space defined by a housing formed in a pump body at an eccentric position relative to a center of the space;
a vane installed to the rotor to rotate eccentrically in the space; and
an oil outlet passing through the pump body and discharging lubricant from the space in a pressurized state by the vane,
wherein the housing is formed on an inside surface of the pump body and has a side groove formed adjacent to the oil outlet along a rotation direction of the vane, and
wherein the vane passes through a front end of the side groove and then passes through a front end of the oil outlet, during rotation of the vane, and
wherein a vent groove of a discharge valve that controls discharge of the lubricant from the oil outlet has a depth of 0.2 mm to 0.6 mm and a width of 1.2 mm to 1.6 mm.

7. The vacuum pump of claim 6 , wherein an installation angular section of the side groove is greater than that of the oil outlet on the basis of the center of the space.

8. The vacuum pump of claim 6 , wherein an angle formed by a center of rotation of the rotor and both ends of the side groove is 77 degrees to 81 degrees.

9. The vacuum pump of claim 6 , wherein the oil outlet is formed above the center of the space and below an upper limit of the space such that, when lubricant introduced into the space is discharged in the pressurized state by the vane, the lubricant is not reintroduced back into the space by gravity.

10. The vacuum pump of claim 6 , wherein a back surface of the oil outlet opposite to an installation portion of the rotor and the vane is provided with the discharge valve which comprises:
a plate valve rotating by pressure of lubricant discharged through the oil outlet; and
a valve stopper limiting a rotation angle of the plate valve, wherein the valve stopper is formed on a surface of the discharge valve and has the vent groove.

11. A vacuum pump of a vehicle for reducing operation noise, comprising:
a rotor rotating in a space defined by a housing formed in a pump body at an eccentric position relative to a center of the space;
a vane installed to the rotor to rotate eccentrically in the space;
an oil outlet passing through the pump body and discharging lubricant from the space in a pressurized state by the vane; and
a discharge valve provided on a back surface of the oil outlet opposite to an installation portion of the rotor and the vane, the discharge valve including:
a plate valve rotating by pressure of lubricant discharged through the oil outlet; and
a valve stopper limiting a rotation angle of the plate valve, wherein the valve stopper is formed on a surface of the discharge valve and has a vent groove,
wherein the vent groove has a depth of 0.2 mm to 0.6 mm and a width of 1.2 mm to 1.6 mm.

12. The vacuum pump of claim 11 , wherein:
the housing is formed on an inside surface of the pump body and has a side groove formed adjacent to the oil outlet along a rotation direction of the vane; and
the vane passes through a front end of the side groove and then passes through a front end of the oil outlet, during rotation of the vane.

13. The vacuum pump of claim 11 , wherein an installation angular section of the side groove is greater than that of the oil outlet on the basis of the center of the space.

14. The vacuum pump of claim 11 , wherein an angle formed by a center of rotation of the rotor and both ends of the side groove is 77 degrees to 81 degrees.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Oh Chunghan

Classifications

• F04C25/02

  for producing high vacuum (sealing arrangements F04C27/00; silencing F04C29/06) · CPC title

• F04C29/068 Primary

  the silencing means being arranged inside the pump housing · CPC title

• F04C18/3564

  the surfaces of the inner and outer member, forming the working space, being surfaces of revolution · CPC title

• F04C29/028

  Means for improving or restricting lubricant flow · CPC title

• F04C2270/14

  Pulsations · CPC title