Swash-plate compressor having a special sliding surface between a coupling portion of a piston and a shoe
View Patent ↗In a swash-plate compressor having a shoe slidably coupling a coupling portion of a piston to a swash plate, the coupling portion has a spherical contact surface and the shoe has a spherical surface slidable along the contact surface. At least one of the contact surface and the spherical surface has an oxide film retaining a number of self-lubricating particles. The swash plate is attached to a drive shaft which is rotatable. The piston performs reciprocal movement by the rotation of the swash plate.
1. A swash-plate compressor comprising:
a drive shaft to be rotated;
a piston having a coupling portion and reciprocally movable by rotation of the swash plate; and
a shoe slidably coupling the coupling portion to the swash plate, the coupling portion having a spherical contact surface, the shoe having a spherical surface slidable along the contact surface, at least one of the contact surface and the spherical surface having an oxide film retaining a number of self-lubricating particles therein.
2. The swash-plate compressor according to claim 1 , wherein the oxide film is formed on at least one of the shoe and the coupling portion by anode oxidation.
3. The swash-plate compressor according to claim 2 , the oxide film further comprising impregnated self-lubricating particles.
4. The swash-plate compressor according to claim 1 , the oxide film further comprising a plurality of microscopic pores, and each of the plurality of microscopic pores contain the self-lubricating particles, wherein the self-lubricating pores are deposited in the microscopic pores by electrolysis.
5. The swash-plate compressor according to claim 1 , the oxide film further comprising a plurality of regularly spaced, microscopic pores.
6. The swash-plate compressor according to claim 4 , wherein the oxide film is formed on at least one of the shoe and the coupling portion by anode oxidation.
7. The swash-plate compressor according to claim 4 , wherein the oxide film comprises a solid lubricant, the self-lubricating particles being deposited by electrolysis of the solid lubricant.
8. The swash-plate compressor according to claim 1 , wherein the oxide film has a thickness of 5 μm or more and a surface hardness of 250 HV or more.
9. The swash-plate compressor according to claim 1 , wherein the oxide film is made of at least one kind of solid lubricant containing MoS 2 as a main component.
10. The swash-plate compressor according to claim 1 , wherein the oxide film comprises at least one kind of solid lubricant containing PTFE as a main component.
11. The swash-plate compressor according to claim 1 , wherein the oxide film comprises an organic iodine compound.