Compressor with lubrication structure
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsTomohiro Murakami, Sokichi Hibino, Atsuyuki Morishita
Life of this patent
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Abstract
A supply passage is formed in a rotary shaft along the axis thereof. An expansion passage is formed in the rotary shaft in such a way as to be led to the supply passage. A pair of fluid passages are formed in the rotary shaft in such a way as to communicate with the expansion passage. The fluid passages extend in a direction orthogonal to the axis and the outlet ports of the fluid passages are open to the outer surface of the rotary shaft. The fluid passages extend from the expansion passage to a control pressure chamber, penetrating through the rotary shaft.
Claims20
A compressor with a lubrication structure, comprising:
- a rotary shaft;
- a piston;
- a suction pressure zone, the internal pressure of which is suction pressure;
- a driving body accommodating chamber;
- a driving body accommodated in the driving body accommodating chamber, wherein the driving body converts rotation of the rotary shaft into reciprocation of the piston, thereby causing the piston to compress gas;
- a gas passage that extends through the rotary shaft and communicates with the driving body accommodating chamber so that gas in the driving body accommodating chamber flows into the gas passage, wherein the gas passage includes an expansion portion formed in the rotary shaft along the axis of the rotary shaft, and wherein the expansion portion connects to the suction pressure zone so that the gas in the expansion portion flows into the suction pressure zone;
- and
- a fluid passage formed in the rotary shaft opening at one end to the expansion portion and at the other end to the driving body accommodation chamber,
- wherein the maximum cross-sectional area of the expansion portion is greater than the maximum cross-sectional area of a section of the gas passage that is upstream of the expansion portion with regard to gas flow in the gas passage.
A compressor with a lubrication structure, comprising:
- a rotary shaft;
- a piston;
- a suction pressure zone, the internal pressure of which is suction pressure;
- a swash plate chamber;
- a swash plate that is accommodated in the swash plate chamber and supported on the rotary shaft, wherein the swash plate converts rotation of the rotary shaft into reciprocation of the piston, thereby causing the piston to compress refrigerant, the refrigerant containing lubricating oil;
- a refrigerant passage that includes an inlet, a guide passage and an expansion portion, wherein the inlet communicates with the swash plate chamber so that refrigerant in the swash plate chamber is introduced into the inlet and flows into the suction pressure zone through the guide passage and the expansion portion, and wherein the guide passage and the expansion portion are formed coaxially along the axis of the rotary shaft;
- and
- a fluid passage formed in the rotary shaft in a direction orthogonal to the axis of the rotary shaft to connect at one end to the expansion portion and at the other end to the swash plate chamber,
- wherein the maximum cross-sectional area of the expansion portion is greater than the maximum cross-sectional area of the guide passage.
Dependencies are inferred from the claim text.