A scroll compressor includes a fixed scroll and a movable scroll. The fixed scroll has a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate. The movable scroll is orbitably disposed to face the fixed scroll. The movable scroll has a spiral movable-side wrap positioned upright on a surface of a movable-side plate, with the movable-side wrap being configured to mesh with the fixed-side wrap. A side clearance is formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps.

The purpose of the present invention is to provide a scroll fluid machine configured so that, during maintenance, grease can be easily supplied to a bearing regardless of an installation environment, thereby improving work efficiency. The present invention provides a scroll fluid machine characterized by comprising: a stationary scroll obtained by forming a wrap section on an end plate; an orbiting scroll obtained by forming a wrap section on an end plate such that the wrap section faces the wrap section of the stationary scroll; a drive shaft for driving the orbiting scroll; an orbiting bearing for supporting the drive shaft relative to the orbiting scroll; and a plurality of pouring openings for pouring a lubricant into the orbiting bearing from the outside.

The objective of the present invention is to provide a scroll-type fluid machine for which the service life can be improved by reducing the load applied to a rotation prevention mechanism. To solve this problem, this scroll-type fluid machine is characterized by being equipped with a stationary scroll, an orbiting scroll that is provided opposing the stationary scroll and undergoes turning movement, a casing provided on the outside of the orbiting scroll, a drive shaft that drives and turns the orbiting scroll, a boss plate part that is provided separated from the orbiting scroll and is connected to the drive shaft, and multiple rotation prevention mechanisms provided between the boss plate part and the casing, and is characterized in that the boss plate part has multiple rotation-prevention-mechanism-side boss plate parts connected to the rotation prevention mechanisms, and a drive-shaft-side boss plate part connected to the drive shaft, and spaces are provided between the rotation-prevention-mechanism-side boss plate parts and the drive-shaft-side boss plate part.

A compact energy cycle construction that utilizes a working fluid in its operation is disclosed having a compact housing of a generally cylindrical form, an orbiting scroll type expander, a central shaft which is driven by the expander, a generator having a rotor and a stator with the central shaft being mounted to the rotor for rotating the rotor relative to the stator, a pump mounted to the central shaft, an evaporator positioned between the expander and the generator and surrounding the central shaft, and the orbiting scroll type expander, the central shaft, the generator, the pump, and the evaporator being housed within the compact housing to form an integrated system operable in accordance with an energy cycle.

The objective of the present invention is to provide a scroll-type fluid machine and maintenance method for same with which reliability and workability are improved by making it possible to supply sufficient grease to necessary parts of an orbiting bearing or auxiliary crank bearing without entailing a complicated operation during maintenance. The present invention provides a scroll-type fluid machine that is provided with a fixed scroll, an orbiting scroll facing the fixed scroll and orbiting, a casing being provided on the outer side of the orbiting scroll in the radial direction, a drive shaft driving the orbiting scroll, an orbiting bearing supporting the drive shaft with respect to the orbiting scroll, and a piping supplying a lubricant to the orbiting bearing, said scroll-type fluid machine being characterized in that: the orbiting scroll is provided with a boss plate that is attached to the drive shaft; the piping is provided in the boss plate; and the tip of the piping faces toward an opening provided between the casing and the fixed scroll or toward an opening provided in the fixed scroll or the casing.

A scroll compressor includes one or more stage of compression disposed within a compressor housing. One or more of the stages includes a stationary scroll member including a base and a generally spiral wrap extending from the base of the stationary scroll member. One or more of the stages further includes an orbiting, scroll member including a substantially circular base and a substantially spiral wrap extending from the base of the orbiting scroll member. A coupling is disposed between the first scroll member base and the second scroll member base and in surrounding relationship to the first and second scroll member spiral wraps. At least one stabilizing pad is disposed between the first scroll member base and the second scroll member base and in axial thrust force relationship with the coupling to at least partially prevent tipping of the second scroll member.

Systems and methods for scroll unloading detection are provided and include a scroll compressor having a scroll compression mechanism. A controller determines a predicted discharge temperature of the scroll compressor, receives an actual discharge temperature of the scroll compressor, and compares the predicted discharge temperature with the actual discharge temperature. The controller also compares a speed of the scroll compressor with a speed threshold and detects unloading of the scroll compression mechanism based on the comparison of the predicted discharge temperature with the actual discharge temperature and based on the comparison of the speed of the scroll compressor with the speed threshold. The controller performs at least one of generating an alert and a remediating action in response to detecting the unloading of the scroll compression mechanism.

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region.

In an exhaust heat recovery device provided with a Rankine cycle device, a clutch for transmitting and interrupting power between an engine and the Rankine cycle device is released appropriately to prevent the Rankine cycle from becoming a load on the engine. An exhaust heat recovery device 1A includes a Rankine cycle device 2A, a power transmission mechanism 3A, and a control unit 4. The power transmission mechanism 3A has a clutch 31 and is capable of transmitting power between an engine 10 and the Rankine cycle device 2A when the clutch 31 is engaged. The control unit 4A controls the engagement and disengagement of the clutch 31 based on a first correlation value correlated with consumed power when the Rankine cycle device 2A is started, and a second correlation value correlated with consumed power of the Rankine cycle device 2A when the output of the Rankine cycle device 2A is negative during the operation of the Rankine cycle device 2A after the start-up.

Provided is a sliding component capable of stably reducing the frictional resistance of a sliding surface entailing eccentric rotation. A sliding component has an annular shape with high-pressure and low-pressure fluids facing inside and outside of the sliding component and has a sliding surface relatively sliding with eccentric rotation. The sliding surface is provided with a plurality of high-pressure grooves open to a space in which the high-pressure fluid exists and a plurality of low-pressure grooves open to a space in which the low-pressure fluid exists. The high-pressure and low-pressure grooves are arranged in a circumferential direction.