JP2018017211A5 - - Google Patents

Claims (11)

A crankshaft having an eccentric pin portion that is eccentric with respect to the shaft center, and a orbiting scroll having a spiral body on a base plate and an orbiting boss portion that is provided on the opposite side of the spiral body and engages with the eccentric pin portion via a pivot bearing. A fixed scroll having a spiral body meshing with the spiral body of the orbiting scroll, a frame having a main bearing for fixing the fixed scroll and housing the orbiting scroll and supporting the crankshaft, and rotating the crankshaft An axial direction formed on the crankshaft for supplying a drive part for making them, a sealed container for housing them, and oil in an oil reservoir provided in the sealed container to the end of the eccentric pin part A scroll compressor having an oiling hole of
A balance weight disposed in the frame below the orbiting scroll and fixed to a non-eccentric portion of the crankshaft to generate a centrifugal force in a direction that counteracts the centrifugal force acting on the eccentric pin portion and the orbiting scroll. When,
A gap passing through the balance weight in the axial direction;
A first seal member provided between the balance weight and the orbiting scroll on the outer diameter side of the gap portion;
A scroll compressor, comprising: a second seal member provided between the balance weight and the frame on the outer diameter side of the gap portion. The scroll compressor according to claim 1,
A thrust bearing is provided between the balance weight and the frame on the outer diameter side of the gap, and supports a thrust force acting on the crankshaft. The thrust bearing also serves as the second seal member. A scroll compressor characterized by that. A scroll compressor according to claim 2,
The scroll compressor is characterized in that the thrust bearing is formed of a resin bearing. The scroll compressor according to claim 1,
A scroll compressor comprising a thrust bearing for supporting a thrust force acting on the crankshaft, the thrust bearing being provided radially inward of the second seal member. The scroll compressor according to claim 1, wherein
The crankshaft below the eccentric pin portion is provided with a flange portion having a diameter larger than that of the crankshaft,
A scroll compressor, wherein the balance weight is axially positioned by the flange. The scroll compressor according to claim 5, wherein
A thrust bearing provided between the balance weight and the frame and supporting a thrust force acting on the crankshaft;
The scroll compressor according to claim 1, wherein the balance weight is positioned in an axial direction on a surface of the flange portion provided on the crankshaft where the thrust bearing is provided. The scroll compressor according to claim 5, wherein
A thrust bearing for supporting a thrust force acting on the crankshaft;
The thrust bearing is provided to support the flange portion,
The scroll compressor according to claim 1, wherein the balance weight is fixed to the flange on the outer diameter side of the bearing surface of the thrust bearing. The scroll compressor according to claim 1, wherein
The gap is formed between the crankshaft outer peripheral surface and the balance weight inner peripheral surface,
The balance weight is provided with at least three claw portions in the circumferential direction that serve as support portions for the crankshaft on the inner peripheral side, and the balance weight is fixed to the crankshaft via the claw portions,
The scroll compressor, wherein the gap portion is provided between the claw portions. The scroll compressor according to claim 8, wherein
The balance weight has an unbalanced portion protruding in a radial direction, and at least one of the claw portions provided on the balance weight is provided on the opposite side of the unbalanced portion with respect to the center of the crankshaft. Scroll compressor characterized by being made. The scroll compressor according to claim 8, wherein
A branch path is formed on the sliding surface of the orbiting boss portion facing the first seal member, and the branch path is formed by a space on the inner diameter side and an outer diameter of the first seal member according to the orbiting motion of the orbiting scroll. Configured to communicate intermittently on the side space,
The oil supplied to the upper end of the eccentric pin portion through the oil supply hole formed in the crankshaft lubricates the swivel bearing, and then a part of the oil passes through the branch path to the first seal member. A scroll compressor that is intermittently supplied to a space on the outer diameter side. The scroll compressor according to claim 10, wherein
By providing at least one of the claw portions in the eccentric direction of the eccentric pin portion, the branch path is on the outer diameter side of the first seal member when the gap portion is in a phase that is not located directly below the branch path. A scroll compressor characterized by being configured to communicate with a space.