Rotary compressor and refrigeration cycle device

A rotary compressor comprising:

• a rotating shaft including an eccentric portion;
• an electric motor that is disposed on a first side of the rotating shaft in an axial direction thereof and rotates the rotating shaft;
• a compression mechanism that is disposed on a second side of the rotating shaft in the axial direction and includes a cylinder, a main bearing provided on the first side in the axial direction with respect to the cylinder, and a sub-bearing provided on the second side in the axial direction with respect to the cylinder;
• a balancer provided on the rotating shaft on the second side of the sub-bearing in the axial direction;
• and
• a balancer cover covering the balancer,
• wherein a lubricating oil supply path that opens on a second side end face in the axial direction is formed in the rotating shaft,
• a supply hole that allows the supply path to communicate with the outside of the balancer cover is formed in the balancer cover at a position facing the supply path in the axial direction,
• the balancer cover includes:
• a cover body including an entrance hole into which a second side end portion of the rotating shaft in the axial direction enters;
• and
• a lid member that includes the supply hole at a position facing the entrance hole in the axial direction and is attached to the cover body from the second side in the axial direction,
• a seal mechanism includes:
• an intermediate member that is interposed between the rotating shaft and the lid member and supported to be movable in the axial direction;
• a detent portion that restricts rotation of the intermediate member relative to the balancer cover;
• a seal member that is provided in the intermediate member and in close contact with either one of the cover body or the lid member;
• and
• a pressing member that presses the intermediate member and the lid member away from each other in the axial direction via the seal member,
• the seal mechanism seals between the balancer cover and the rotating shaft, and the seal mechanism is provided between the balancer cover and the rotating shaft while allowing relative movement between the intermediate member and the lid member which is a portion of the balancer cover, and
• the seal mechanism abuts the second side end face of the rotating shaft while being pressed toward the first side in the axial direction.