A compressor includes a drive shaft having a main shaft and an eccentric portion, and a compression mechanism having a fitted tubular portion into which a fitted shaft portion of the drive shaft is fitted. The fitted shaft portion and the fitted tubular portion slide relative to each other with an oil film interposed between. The fitted tubular portion has first and second sliding surfaces formed as portions of an inner peripheral surface of the fitted tubular portion in the circumferential direction. The second sliding surface has a smaller axial width than the first sliding surface. A sliding portion between the fitted shaft portion and the fitted tubular portion has a gap adjacent to the second sliding surface into which a lubricating oil flows, and an oil retainer to keep the lubricating oil in the gap from flowing out toward an end surface of the fitted tubular portion.

Provided is a liquid supply mechanism including: a plurality of liquid supply sections each including a plurality of branch paths whose central axes intersect with each other, and a supply path having a side surface to which the plurality of branch paths of the plurality of liquid supply sections are directly connected, respectively, and supplying liquid, which is supplied from an upstream, to the branch paths.

A rotary compressor includes: a compressor housing stores lubricating oil; a compression unit compresses the refrigerant; and a motor drives the compression unit. The compression unit includes a cylinder, an upper end plate and a lower end plate, a main bearing provided on the upper end plate, a sub bearing provided on the lower end plate, a rotary shaft supported by the main bearing and the sub bearing, and a piston fitted to the rotary shaft. An inner peripheral surface of a shaft hole of the sub bearing is provided with an oil-supply groove having a helical shape that supplies the lubricating oil from a lower end to an upper end of the shaft hole, and the oil-supply groove is inclined with respect to the rotary shaft in a rotating direction and extends from the lower end toward the upper end of the rotary shaft in the rotating direction.

A scroll compressor is provided capable of supplying oil stored in an oil storage chamber upward through a rotary shaft to supply the oil to a compression device and to lubricate a bearing portion. The scroll compressor may include a casing, a drive motor, a rotary shaft, a main frame, a fixed scroll, and an orbiting scroll. A medium pressure chamber may be formed in or at a middle of the main frame, the fixed scroll, and the orbiting scroll. A pocket groove configured to guide oil discharged through the oil hole to the medium pressure chamber may be formed in an upper surface of the orbiting scroll, and a differential pressure path configured to guide the oil guided to the medium pressure chamber to the compression chamber may be provided in the fixed scroll.

The present disclosure relates to an oil line structure of a compressor and compressor, wherein the oil line structure of a compressor including: a spindle, an upper flange and a rolling bearing, wherein an interior of the rolling bearing encloses a cylinder cavity for performing compression, and the rolling bearing comprises a rolling body; wherein the spindle is internally provided with a spindle oil hole, and the upper flange is provided with an upper oil groove which is in communication with the spindle oil hole to guide an oil into the rolling body so as to lubricate the same. In this way, the heat generated by friction of the rolling body is discharged in time, so as to prevent a temperature rise in the bearing and reduce the wear, thereby improving the energy efficiency value of the compressor and ensuring normal operation of the compressor.

A scroll compressor is provided that may prevent an oil-feeding hole from being blocked due to a high pressure refrigerant, which is compressed in compression chambers and introduced into the oil-feeding hole through an oil-feeding slit, by blocking one of both end portions of the oil-feeding slit, adjacent to the compression chambers, when the oil-feeding hole is formed through an outer circumferential surface of a bearing and the oil-feeding slit, which communicates with the oil-feeding hole, is formed on the outer circumferential surface. This may allow for smooth oil supply onto the outer circumferential surface of the bearing through the oil-feeding hole, thereby enhancing a bearing performance. Also, the oil-feeding hole or slit may be formed at a closest position to an oil feeding-required section, not within the section. This may allow for quick oil supply into the oil feeding-required section, resulting in further enhanced bearing performance.

A scroll compressor includes fixed and movable scrolls, and a drive part. The fixed scroll has a fixed-side end plate, a fixed-side lap, and a thrust sliding portion surrounding the first lap. The movable scroll has a movable-side end plate and a movable-side lap. The drive part revolves the movable scroll so that refrigerant in a compression chamber formed by the fixed-side lap and movable-side lap is compressed. A back-pressure space which communicates with the compression chamber for at least a prescribed period in a revolution cycle is formed at the back face side of the movable scroll. A first oil channel supplied with oil from a space is formed in a first angle region of the fixed-side end plate. A communication channel formed in a second angle region communicates with the compression chamber. A second oil channel communicating with the back-pressure space is formed in the second angle region.

A scroll compressor includes: a housing; a rotary shaft; a fixed scroll including a fixed base plate, a fixed spiral wall, and an outer peripheral wall; an orbiting scroll including an orbiting base plate and an orbiting spiral wall; a compression chamber; a suction port; a suction chamber; a discharge chamber; an oil storage chamber; and an oil supply hole. The fixed scroll includes a groove disposed at the same position as the oil supply hole or on an outer side with respect to the oil supply hole in a radial direction of the rotary shaft. At least part of the groove is configured to be closed by the orbiting base plate according to a revolution of the orbiting scroll. The oil supply hole and the groove form part of an oil supply passage that supplies oil in the oil storage chamber to the suction chamber.

An oil supply mechanism comprises: an oil pump device connected to a rotating shaft of a rotating machinery; a main oil supply passage formed in the rotating shaft substantially in the axial direction of the rotating shaft; and a bypass oil passage in communication with the main oil supply passage and allowing a part of lubricating oil in the main oil supply passage to flow out via the bypass oil passage. The bypass oil passage extends in a direction substantially transverse to the rotating shaft. The bypass oil passage is configured such that a radial distance from an outlet of the bypass oil passage to the axis of the rotating shaft is greater than the radius of the rotating shaft.

Disclosed are an oil separation structure and a compressor. The oil separation structure includes a housing and a filtering screen. A core is disposed at a center of the housing, and a plurality of guiding members for guiding gas flow are provided along circumferential directions of the core. The filtering screen is disposed on a periphery of the housing, and a cavity is formed between the filtering screen and the core. The housing is provided with a gas inlet and a gas outlet which are in communication with the cavity, and the gas inlet is configured to introduce the gas flow into the cavity; the guiding members are configured to guide the gas flow to rotationally flow around the core, and the gas outlet is configured to discharge the gas flow from the cavity.