JP2014098382A5

JP2014098382A5 -

Info

Publication number: JP2014098382A5
Application number: JP2013149620A
Authority: JP
Filing date: 2013-07-18
Publication date: 2015-09-17
Anticipated expiration: 2033-07-18

Description

本発明に係るロータリ圧縮機は、固定子及び回転子を有する電動機と、前記回転子の回転中心と同軸上に配置された複数の中心軸部、及び、これら中心軸部の間に設けられて該中心軸部の中心軸から偏心した中心軸上に配置された少なくとも１つの偏心部を有し、前記中心軸部の一端が前記回転子に固定されたクランク軸と、前記偏心部に回転自在に取り付けられたローラ、円筒状のシリンダ室が形成され、該シリンダ室に前記偏心部及び前記ローラが配置されたシリンダ、及び、前記シリンダ室内を圧縮室と吸入室の２つの空間に仕切るベーンが、前記偏心部と同数設けられた圧縮機構部と、前記電動機、前記クランク軸及び前記圧縮機構部を収納する密閉容器と、を備えたロータリ圧縮機であって、前記ローラの少なくとも１つは、前記偏心部の外周面に回転自在に設けられた内周側ローラと、該内周側ローラの外周面に設けられた一体物の外周側ローラとで構成され、前記内周側ローラは、前記偏心部の中心軸方向に積層された複数のリング体で構成されており、前記偏心部の反偏心側の外周面は、前記中心軸部の外周面よりも該偏心部の中心軸寄りに形成され、前記偏心部の両端部のうちの少なくとも一方側には、前記中心軸部における前記偏心部との境界部に、前記リング体を前記偏心部の偏心方向へ移動させるための逃がし部が形成されているものである。 A rotary compressor according to the present invention is provided between an electric motor having a stator and a rotor, a plurality of central shaft portions arranged coaxially with the rotation center of the rotor, and between these central shaft portions. A crankshaft having at least one eccentric portion arranged on a central axis that is eccentric from the central axis of the central shaft portion, one end of the central shaft portion being fixed to the rotor, and rotatable to the eccentric portion A cylinder having a cylindrical cylinder chamber formed therein, the cylinder in which the eccentric portion and the roller are disposed, and a vane that divides the cylinder chamber into two spaces of a compression chamber and a suction chamber. A rotary compressor comprising: a compression mechanism portion provided in the same number as the eccentric portion; and a sealed container that houses the electric motor, the crankshaft, and the compression mechanism portion, wherein at least one of the rollers is: Above An inner peripheral roller provided rotatably on the outer peripheral surface of the center portion and an integral outer peripheral roller provided on the outer peripheral surface of the inner peripheral roller. The inner peripheral roller is the eccentric part multiple is composed of a ring body that is laminated in the direction of the central axis of the outer peripheral surface of the counter-eccentric side of the eccentric portion is formed in the central axis side of the eccentric portion from the outer circumferential surface of the central shaft portion A relief portion for moving the ring body in the eccentric direction of the eccentric portion is formed on at least one side of both end portions of the eccentric portion at a boundary portion of the central shaft portion with the eccentric portion. It is what.

本発明に係るロータリ圧縮機は、ローラが内周側ローラと外周側ローラとで構成されている。そして、内周側ローラは、偏心部の中心軸方向に積層された複数のリング体で構成されている。また、本発明に係るロータリ圧縮機のクランク軸は、中心軸における偏心部との境界部に、リング体を偏心部の偏心方向へ移動させるための逃がし部が形成されている。このため、本発明に係るロータリ圧縮機は、偏心部の反偏心側の外周面を中心軸部の外周面よりも該偏心部の中心軸寄りに形成しても、つまり偏心部の直径を大きくせずに偏心部の偏心量を大きくしても、内周側ローラを構成するリング体を偏心部に取り付けることができる。このため、本発明に係るロータリ圧縮機は、偏心部の偏心量を大きくしても、偏心部での摺動損失を抑制することができる。 In the rotary compressor according to the present invention, the roller is composed of an inner peripheral roller and an outer peripheral roller. And the inner peripheral side roller is comprised by the some ring body laminated | stacked on the central-axis direction of the eccentric part. Further, the crankshaft of the rotary compressor according to the present invention is formed with a relief portion for moving the ring body in the eccentric direction of the eccentric portion at the boundary portion with the eccentric portion in the central axis. Therefore, in the rotary compressor according to the present invention, even if the outer peripheral surface of the eccentric portion on the side opposite to the eccentric side is formed closer to the central axis of the eccentric portion than the outer peripheral surface of the central shaft portion, that is, the diameter of the eccentric portion is increased. Even if the amount of eccentricity of the eccentric portion is increased, the ring body constituting the inner peripheral side roller can be attached to the eccentric portion. For this reason, the rotary compressor according to the present invention can suppress the sliding loss at the eccentric portion even if the eccentric amount of the eccentric portion is increased.

Claims

An electric motor having a stator and a rotor;
A plurality of central shaft portions disposed coaxially with the rotation center of the rotor, and at least one disposed on the central shaft provided between the central shaft portions and eccentric from the central shaft of the central shaft portion A crankshaft having two eccentric parts, one end of the central shaft part being fixed to the rotor,
A roller rotatably attached to the eccentric part, a cylindrical cylinder chamber is formed, a cylinder in which the eccentric part and the roller are arranged in the cylinder chamber, and a compression chamber and a suction chamber in the cylinder chamber. A compression mechanism portion provided with the same number of the eccentric portions as the vane partitioning into two spaces;
A sealed container that houses the electric motor, the crankshaft, and the compression mechanism;
A rotary compressor comprising:
At least one of the rollers is composed of an inner peripheral roller rotatably provided on the outer peripheral surface of the eccentric part, and an integral outer peripheral roller provided on the outer peripheral surface of the inner peripheral roller,
The inner peripheral roller is composed of a plurality of ring bodies stacked in the direction of the central axis of the eccentric part,
The outer peripheral surface of the eccentric portion opposite to the eccentric side is formed closer to the central axis of the eccentric portion than the outer peripheral surface of the central shaft portion,
On at least one side of both ends of the eccentric part, a relief part for moving the ring body in the eccentric direction of the eccentric part is formed at a boundary part of the central shaft part with the eccentric part. A rotary compressor.

2. The rotary compressor according to claim 1, wherein a length of the eccentric portion in the outer peripheral side roller in a central axis direction is larger than a length of the eccentric portion in the inner peripheral roller in a central axis direction.

The central shaft portion includes a main shaft to which the rotor is attached, and a sub shaft arranged on the opposite side of the main shaft with respect to the eccentric portion,
When the radius of the main shaft is defined as R, the radius of the sub shaft is defined as r, the amount of eccentricity of the eccentric portion is defined as e, the radius of the eccentric portion is defined as Rc, and the radius of the outer peripheral portion of the inner peripheral roller is defined as Ri. ,
Rc-e <R, Rc-e <r, Ri-e <R, and Ri-e> r
The rotary compressor according to claim 1 or 2, wherein:

A plurality of the eccentric portion of the crankshaft, the roller, the cylinder, and the vane;
The central shaft portion includes an intermediate shaft disposed between the eccentric portions,
When the radius of the intermediate axis is defined as rm,
Rc-e <rm and Ri-e> rm
The rotary compressor according to claim 3, wherein

5. The rotary compressor according to claim 4, wherein an escape portion for moving the outer peripheral side roller is formed at a boundary portion with the eccentric portion at both ends of the intermediate shaft.

6. The rotary compressor according to claim 4, wherein a length of the intermediate shaft is larger than a height of the outer peripheral side roller.

In the state where the inner peripheral side roller is provided in the eccentric portion,
3. The rotary compressor according to claim 1, wherein an outer peripheral surface of the inner peripheral roller opposite to the eccentric side is disposed outside an outer peripheral surface of the central shaft portion.

The rotary compressor according to claim 1 or 2, wherein a plurality of the eccentric portion, the roller, the cylinder, and the vane of the crankshaft are provided.

The said relief part has an inclined surface which connects the outer peripheral surface of the said center axis | shaft part, and the outer peripheral surface of the non-eccentric side of the said eccentric part, The Claim 1 characterized by the above-mentioned. Rotary compressor.

The said escape part has a step part dented from the outer peripheral surface of the said center axis | shaft part to the outer peripheral surface side of the eccentric part of the eccentric part, The Claim 1 characterized by the above-mentioned. Rotary compressor.

The rotary compressor according to any one of claims 1 to 10, wherein the inner peripheral roller is press-fitted into the outer peripheral roller.

The outer peripheral surface of the inner peripheral roller and the inner peripheral surface of the outer peripheral roller are rougher than the inner peripheral surface of the inner peripheral roller and the outer peripheral surface of the outer peripheral roller. The rotary compressor as described in any one of Claims 1-10.

The unevenness is formed in the outer peripheral surface of the inner peripheral side roller and the inner peripheral surface of the outer peripheral side roller, and the unevenness of the inner peripheral side roller and the unevenness of the outer peripheral side roller mesh with each other. The rotary compressor as described in any one of Claims 1-10.

On the outer peripheral surface of the inner peripheral roller and the inner peripheral surface of the outer peripheral roller, a concave groove extending in the central axis direction of the eccentric portion is formed,
The rotary compressor according to any one of claims 1 to 10, wherein a key is provided between the concave groove of the inner peripheral side roller and the concave groove of the outer peripheral side roller.