Vane-type compressor having an oil supply channel between the oil resevoir and vane angle adjuster

Patent metadata

Field	Value
Publication number	US-9382907-B2
Application number	US-201214350959-A
Country	US
Kind code	B2
Filing date	Jan 11, 2012
Priority date	Jan 11, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A vane-type compressor includes a rotor shaft that includes rotating shaft portions and a rotor portion, which are integrated with one another. A lower end of the rotating shaft is disposed in an oil reservoir. The vane-type compressor also includes vane aligners disposed at both end portions of vanes, and recess portions, which are respectively formed in a frame and a cylinder head so as to be concentric with an inner circumferential surface of a cylinder. Outer circumferential surfaces of the vane aligners are slidably supported by the recess portions. In the rotor shaft, oil supply channels, which allow communication between the oil reservoir and the recess portions of the frame and the cylinder head, and an oil pump, which supplies refrigerating machine oil in the oil reservoir to the oil supply channels, are provided.

First claim

The invention claimed is:

1. A vane-type compressor comprising:
a sealed container;
an oil reservoir disposed at a bottom portion of the sealed container, and configured to accumulate therein refrigerating machine oil; and
an electrical drive element and a compressing element disposed in the sealed container, the compressing element including
a cylinder having a cylindrical inner circumferential surface,
a rotor shaft that includes
a cylindrical rotor portion that rotates in the cylinder about a rotational axis offset from a central axis of the inner circumferential surface by a predetermined distance, and
a shaft portion, wherein a rotational force is transmitted from the electrical drive element to the rotor portion through the shaft portion, and a lower end of the shaft portion is disposed in the oil reservoir,

a frame that closes one of open ends of the inner circumferential surface of the cylinder, wherein the shaft portion is rotatably supported by a bearing portion of the frame,
a cylinder head that closes the other open end of the inner circumferential surface of the cylinder, wherein the shaft portion is rotatably supported by a bearing portion of the cylinder head, and
at least one vane disposed in the rotor portion, the vane having a tip end portion on an outer circumferential side, the tip end portion projecting from the rotor portion, the tip end portion having an outwardly convex arc shape,

wherein a vane angle adjuster is provided which holds the vane so as to allow a compressing operation to be performed while constantly maintaining a normal to the arc shape of the tip end portion of the vane to be coincident with a normal to the inner circumferential surface of the cylinder and which supports the vane such that the vane is swingable and movable in a centrifugal direction relative to the rotor portion,
wherein the vane angle adjuster at least includes:
vane aligners that have respective base portions having a ring shape or a partial ring shape, each base portion having one of a projection and a recess, the vane having end portions, each end portion of the vane having the other of the projection and the recess, the vane aligners being connected to the vane each projecting portion being inserted into a corresponding one of the recesses, or the base portions of the vane aligners being integrated with the respective end portions of the vane, and
vane aligner bearing portions disposed in outer circumferential surfaces of recess portions, the recess portions being formed in cylinder-side end surfaces of the frame and the cylinder head, the recess portions each having a bottomed cylindrical shape, the recess portions each being coaxial with the inner circumferential surface of the cylinder, wherein the base portions of the vane aligners is inserted into the recess portions, outer circumferential surfaces of the base portions of the vane aligners are slidably supported by the vane aligner bearing portions,

wherein an oil supply channel that is formed in the rotor shaft and allows communication between the oil reservoir and the recess portions of the frame and the cylinder head and oil supplier that supplies the refrigerating machine oil in the oil reservoir to the oil supply channel are provided.

2. The vane-type compressor of claim 1 ,
wherein ring-shaped groove portions are formed at bottom portions of the recess portions of the frame and the cylinder head such that the groove portions are each coaxial with the inner circumferential surface of the cylinder, and
wherein the base portions of the vane aligners are inserted into the groove portion.

3. The vane-type compressor of claim 1 ,
wherein a cylindrical bush holding portion, which penetrates though the rotor portion in the rotational axis direction, is formed in the rotor portion,
wherein a pair of semi-cylindrical bushes are inserted into the bush holding portion, and
wherein the vane is clamped and supported by the bushes so as to be supported by the rotor portion swingably and movably in a centrifugal direction.

4. The vane-type compressor of claim 3 ,
wherein the rotor portion has a cylindrical vane relief portion that is formed on a side closer to an inner circumferential side than the bush holding portion so as not to cause a tip end portion of the vane, the tip end portion being on the inner circumferential side, to be brought into contact with the rotor portion and penetrates therethrough in the rotational axis direction so as to communicate with the bush holding portion, and
wherein the vane relief portion communicates with the recess portions of the frame and the cylinder head.

5. The vane-type compressor of claim 4 ,
wherein the oil supply channel that is provided in the rotor shaft and allows communication between the oil reservoir and the vane relief portion and oil supplier that supplies the refrigerating machine oil in the oil reservoir to the oil supply channel are provided.

6. The vane-type compressor of claim 4 , further comprising:
at least one oil supply channel that is formed in the vane and penetrates through the vane from the inner circumferential side to the outer circumferential side.

7. The vane-type compressor of claim 4 ,
wherein a pressure in the vane relief portion is a discharge pressure.

8. The vane-type compressor of claim 1 ,
wherein an oil supply channel is provided, which has an opening at a position where the rotor portion and the inner circumferential surface of the cylinder are closest to each other and allows communication between the opening and the recess portion of at least one of the frame and the cylinder head.

9. The vane-type compressor of claim 1 , further comprising:
oil supply channels that allow communication between the vane aligner bearing portion and the recess portion of the frame and between the vane aligner bearing portion and the recess portion of the cylinder head.

10. The vane-type compressor of claim 9 ,
wherein gaps are formed between the base portions of the vane aligners and bottom portions of the respective recess portions of the frame and the cylinder head, the gaps serving as the oil supply channels that allow communication between the vane aligner bearing portion and the recess portion of the frame and between the vane aligner bearing portion and the recess portion of the cylinder head.

11. The vane-type compressor of claim 10 ,
wherein oil retaining grooves are formed in the vane aligner bearing portions, and
the oil retaining grooves communicate with the respective oil supply channels that allow communication between the vane aligner bearing portion and the recess portion of the frame and between the vane aligner bearing portion and the recess portion of the cylinder head.

12. The vane-type compressor of claim 1 ,
wherein a pressure in the sealed container is a discharge pressure.

13. The vane-type compressor claim 1 ,
wherein a radius of the arc shape of the tip end portion of the vane is equal to a radius of the inner circumferential surface of the cylinder.

Assignees

• Sekiya Shin
• Kawamura Raito
• Maeyama Hideaki
• Takahashi Shinichi
• Sasaki Tatsuya
• Sugiura Kanichiro
• Mitsubishi Electric Corp

Inventors

• Sekiya Shin
• Kawamura Raito
• Maeyama Hideaki
• Takahashi Shinichi
• Sasaki Tatsuya
• Sugiura Kanichiro

Classifications

• F01C21/0809

  Construction of vanes or vane holders · CPC title

• F04C2240/809

  Lubricant sump · CPC title

• F01C21/0836 Primary

  comprising guiding means, e.g. cams, rollers · CPC title

• F04C18/3441

  the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation · CPC title

• F04C2240/603

  with internal channels for fluid distribution, e.g. hollow shaft · CPC title