30results about How to "Reduced sliding loss" patented technology

The invention relates to a dual-sliding vane rotary compressor, a control method and an application thereof. The dual-sliding vane rotary compressor comprises a sealed shell of which the internal pressure is the pressure at the high-pressure side, wherein a compressing mechanism part and an electric motor part are arranged in the shell, the compressing mechanism part comprises a cylinder, a suction hole communicated with a cylinder compressing cavity and a piston eccentrically rotating in the cylinder compressing cavity, the cylinder is respectively provided with two sliding vanes and two discharge holes, the compressor is also provided with a pressure switching mechanism which can switch the pressure of a second sliding vane cavity between the pressure at the high-pressure side and the pressure at the low-pressure side, and the pressure switching mechanism can be used for realizing a one-sliding vane operating mode and a first sliding vane and second sliding vane simultaneous operating mode so as to change the displacement of the cylinder, thus finishing the capability control on the displacement of the cylinder by means of one cylinder. The invention has the advantages of small volume, less parts and low cost in the structure aspect and has the advantages of lowering slippage loss and improving compressor efficiency in the capability control mode aspect.

Disclosed is a vane rotary-type rotary compressor wherein the opposite eccentric shaft-side outer peripheral surface of an eccentric portion (41) of a shaft (4) is deviated further inward than the outer peripheral surface of a main shaft portion (42) to be fitted in a main bearing (7) and the outer peripheral surface of a subsidiary shaft portion (43) to be fitted in a subsidiary bearing (8), and clearance means necessary when a piston (9) is assembled with the shaft (4) are provided on the inner peripheral surface of the piston (9) and the eccentric portion (41) of the shaft (4), so that the shaft diameter of the eccentric portion (41) is reduced. Thus, the viscous force of oil applied to the eccentric portion (41) of the shaft (4) and the inner peripheral surface of the piston (9) can be reduced, and the rotational moment around the center of the eccentric portion (41) of the shaft (4), which is applied to the piston (9) in the rotational direction of the shaft (4), can be reduced. Therefore, the sliding loss generated due to the reciprocation of a vane (11) within a vane groove (10) can be reduced.

The invention provides a compressor increased in efficiency by reducing sliding loss. In this hermetically sealed compressor, compression elements and electric elements are stored in a hermetically sealed container, and a crankshaft 7 driven by the electric elements is connected to a piston 4 through a connecting rod 2 by a ball joint structure. The ball joint structure comprises an inner spherical surface 4a formed on the piston 4, a spherical body part 2a formed on the connecting rod 2, and a rotation restriction part 10d formed separately from the piston 4 and the connecting rod 2. The rotation restriction part 10d is installed on the piston 4 side but the connecting rod 2 side to restrict the relative rotation of the piston 4 and the connecting rod 2. A ferrous sintered material sealed by an oxide film is used for the piston 4 and the connecting rod 2.

A highly reliable sliding face modification material capable of forming a stable film of molybdenum disulfide on the sliding face of a sliding member, the sliding face modification material having a molybdenum disulfide content of 95 wt% or more and an organic material content of 1500 ppm or less in weight ratio, and the sliding face modification material being projected onto the sliding face to form a coating layer.

The invention provides a rotary two-stage compressor. It has: a rotating shaft with two eccentric parts; a rotating compression element, which is provided with a low-pressure compression element and a high-pressure compression element through an intermediate partition. Rollers that rotate eccentrically to perform orbital motion; and a discharge space for low-pressure compression elements separated from the internal space of the airtight container. The above-mentioned discharge space is provided adjacent to the above-mentioned low-pressure compressing element, at least there is a space between the bearing that pivotally supports the above-mentioned rotating shaft and the wall surrounding the bearing, and the above-mentioned rotating shaft and A discharge space cover of the through hole in the internal space of the airtight container, the discharge space cover is opposed to the compression element for low pressure and isolates the discharge space from the internal space of the airtight container, and the discharge space cover and the bearing are connected by an elastic body. Accordingly, deformation of the intermediate container due to pressure load and fastening load in the rotary two-stage compressor is suppressed, and sliding loss and leakage loss of coolant or refrigerating machine oil can be reduced.

A bearing part (120) and a compression chamber (115) are disposed so that a first central line (141) showing the axial center of the bearing part (120) and a second central line (142) showing the axial center of the compression chamber (115) may intersect with each other, angle a1 formed between the first central line (141) and the second central line (142), and predetermined angle b1 may satisfy the relation of formula 1 and angle b1 is set by relating to absolute value c1 of inclination angle of a shaft (110) with respect to the bearing part (120) based on the clearance of the bearing part (120) and the main shaft part (111), and thereby prying between a piston and the compression chamber (115) can be prevented.

The invention provides a rotary compressor and a manufacturing method thereof, which reduce the slide loss between a roller and an eccentric portion as much as possible and cause no obstruction to the assembling operation. A rotating shaft (8) is composed of a first rotating shaft portion (36) which is supported by an upper bearing and has a first eccentric portion (13), and a second rotating shaft portion (37) which is connected with the first rotating shaft portion, is supported by a lower bearing and has a second eccentric portion (23). The portion of each eccentric portion opposite to the projecting portion of the projecting eccentric portion of each rotating shaft portion is located at the inner side, with respect to partial rotating shaft portions supported by the bearings.

The invention discloses a dual-cylinder rotation type compressor and a refrigerator with same. The dual-cylinder rotation type compressor comprises a shell and a compression mechanism, wherein the compression mechanism comprises an air cylinder component and two pistons; the air cylinder component comprises two air cylinders; each air cylinder comprises two slide sheet grooves; the two slide sheet grooves of each air cylinder are radially and symmetrically arranged; each slide sheet groove is internally provided with a slide sheet which is suitable for butting against the outer peripheral wall of the corresponding piston; and two slide sheets in each air cylinder are matched with the corresponding pistons so as to define two compression cavities. According to the dual-cylinder rotation type compressor provided by the invention, the slide loss of an eccentric shaft and the failure of the eccentric shaft are reduced, and the noise caused by the vibration and air exhaust of the compressor is reduced.

A scroll compressor is provided to lower back pressure, which is raised beyond a pressure of a discharge pressure space by installing a back pressure relief valve to discharge pressure of a back pressure chamber into the discharge pressure space. A scroll compressor comprises a closed container(2) including discharge pressure spaces(25a,25b), a fixed scroll(11) fixed to the inside of the closed container, a revolving scroll(12) and a back pressure chamber(16). The revolving scroll engages with the fixed scroll to form a compression chamber(15). The revolving scroll discharges refrigerant, which is pressurized in the compression chamber, into the discharge pressure space through a rotating movement. The revolving scroll is provided with the back pressure chamber in opposition to the fixed scroll. A back pressure relief valve apparatus(10) is installed in the closed container.

The invention discloses a rotary compressor and a refrigeration cycle device with the same. The rotary compressor comprises a shell and a motor arranged in the shell, wherein the difference value of any two rotary speeds of the motor is delta R in a range of less than 40% of the maximum refrigeration capacity obtained during rotation of the motor; the difference value of the refrigeration capacities obtained by the two rotary speeds is taken as delta H; tan theta b of the rotary compressor is delta Hb / delta Rb; tan theta a of a rotary compressor in the prior art is delta Ha / delta Ra; Y is tan theta a / tan theta b; and the value of Y is 1.10-1.30. According to the rotary compressor disclosed by the embodiment of the invention, the discharge capacity is reduced and the running rotary speed range of the compressor is expanded, so that the compressor can be miniaturized, the slide loss can be reduced, and the cost can be lowered.

The invention provides a fuel supply device capable of improving the lubricity of the bearing of a motor, which has a stable fuel pressure and high reliability.According to the device, a pump part (2B) is driven by a motor part (2A).The inhaled fuel is pressurized and then is discharged by the pump part (2B).The motor part (2A) comprises a stator (9), a rotor (10) arranged opposite to the stator (9), a bottomed cylindrical partition body (17) separating the stator (9) from the rotor (10) and a bearing (20). The stator (9) is equipped with a support (6), an iron core (8) and a coil wound on the iron core (7). The rotor (10) rotates relative to a shaft (11).The partition body (17) communicates with the pump part (2B) and is filled with fuel. The bearing (20) arranged at the bottom of the partition body (17) supports one end of the shaft (11) of the rotor (10). The rotor (10) is equipped with a plurality of fuel path (14) penetrating the rotor (10) parallel to the shaft (11).

The invention provides a compressor which has low cost and high efficiency. The compressor can restrain the leakage between blades and a compression component while reducing the slippage loss of the blades, and can improve the working quality of the blades. The compressor comprises the compression component and the blades; wherein, the upper side (one side) which is axially crossed with a rotating shaft is continuous and slant between an upper dead center and a lower dead center; at the same time, the compression component is arranged in a cylinder and is driven by the rotating shaft to rotate, liquid sucked in from a suction port is compressed and is discharged from an exhaust port, and the blades which divide the compression space in the cylinder into a low pressure chamber and a high pressure chamber are arranged between the suction port and the exhaust port, and are contacted with the upper side (one side) of the compression component. The upper side of the compression component has a plane formed in a prescribed limit which takes an intermediate point between the upper dead center and the lower dead center as the center and a curved surface which is continuous from the plane and gradually closes to the upper dead center and the lower dead center.

In a rotary compressor of a vane rotary type, an outer peripheral surface of an eccentric portion 41 of a shaft 4 on a side adjacent to a center of the shaft 4 is located radially inwardly of an outer peripheral surface of a main shaft 42 inserted in a main bearing 7 and that of an auxiliary shaft 43 inserted in an auxiliary bearing 8. Also, a back clearance means used in mounting a piston 9 on the shaft 4 is provided in each of an inner peripheral surface of the piston 9 and the eccentric portion 41 of the shaft 4. Such configurations can reduce a diameter of the eccentric portion 41. A reduction in diameter of the eccentric portion 41 can reduce a viscous force of oil acting between the eccentric portion 41 of the shaft 4 and the inner peripheral surface of the piston 9 to thereby reduce a rotational moment about a center of the eccentric portion 41 of the shaft 4, which rotational moment acts on the piston 9 in a direction of rotation of the shaft 4, thus making it possible to reduce a sliding loss that is generated by a reciprocating motion of a vane 11 in a vane groove 10.

A rotary compressor having a piston provided integrally with a blade is contained in a hermetic vessel which is operated at a suction pressure of the rotary compressor and not to discharge pressure. The rotary compressor includes a compression mechanism portion having a cylinder which includes a suction port formed in a cylinder chamber, a piston which eccentrically revolves in the cylinder, a blade which is integrally formed with the piston and partitions the cylinder chamber into a high pressure chamber and a low pressure chamber, and a driving shaft for revolving the piston. The rotary compressor also includes an electric motor portion for rotating the driving shaft, a hermetic vessel which houses the compression mechanism portion and the electric motor portion and is in communication with the suction port thereby to maintain an interior of the hermetic vessel at a suction pressure atmosphere, and a discharge port formed in the cylinder chamber and in direct communication with an exterior of the hermetic vessel, whereby starting is smoothly performed, a motor having a large starting torque is not required, components such check valves can be avoided, and lubricating oils with stable viscosity can be used such that the compressor operates with environmentally-friendly refrigerants.

The present invention provides a hermetic compressor which can reduce the slip loss and improve reliability and ability. The hermetic compressor accommodates a compress unit and an electric unit in a hermetic container, an eccentric part (7a) and a piston (4) disposed on a drive shaft driven by the electric unit are linked by a link rod (2), the adopted constitution has an inner ball surface (4a) disposed on the piston (4) and a ball part (2a) of the link rod (2) enclosed by the inner ball surface (4a) and linked to the piston (4) by a ball socket joint mechanism, the front end of the ball part (2a) has a small radius part (2d) with a distance to the center of the ball part (2a) smaller than the radius of the ball part (2a).

A hermetic compressor includes a hermetic container that stores lubricating oil, an electrically-driven element having a stator and a rotor, a shaft having a compressing element driven by the electrically-driven element, and including an eccentric shaft portion, a cylinder block, a piston, a coupling device that connects the piston and the eccentric shaft portion, a main bearing, and a thrust ball bearing that supports a vertical load by the self weight of the rotor and the shaft. The thrust ball bearing includes a plurality of balls having a diameter of 3 mm or less, a holder portion holding the balls and formed of a polymeric material, and an upper washer and a lower washer disposed above and below the balls, respectively, and the viscosity grade of the lubricating oil is from ISO VG3 to ISO VG10.

The invention relates to a sealed type scroll compressor which decreases a sliding loss between a thrust ring and a orbit scroll and improves the efficiency of the sealed type scroll compressor while preventing the leakage of a refrigerant between a fixed scroll and the orbit scroll, and the compressor provides a relation of F1 < F2, in which F1 is an operating pressure applied from the front surface space of the thrust ring to the thrust ring, and F2 is an operating pressure applied from a back surface space to the thrust ring.

The invention provides a rotary two-stage compressor, having: a rotary shaft including two eccentric parts; a rotary compression element provided with a low pressure compression element and a high pressure compression element by a partition plate, with a roller revolved by eccentric rotation of the eccentric parts in each compression chamber; and a delivery space of the low pressure compression chamber separated from an inner space of a hermetic vessel. The said delivery space is arranged adjoining the low pressure compression element, including at least a bearing supporting a rotary shaft, a space between walls surrounding the bearing; opposing to the low pressure compression element, a delivery space cover provided with a through hole keeping communication of the rotary shaft separating the delivery space and an inner space of the hermetic vessel and supported by the bearing; the delivery space cover and the bearing are connected through an elastic body. Consequently, the invention can suppress deformation of an intermediate vessel accompanying pressure load and fastening load in a rotary two stage compressor and reduce slide loss and leak loss of refrigerant or refrigerator oil.

The invention discloses a volume control type rotary compressor. A compressor structure part which is driven by an electric motor and has a low-pressure gas absorption means and a high-pressure gas discharge means comprises cylinders with compression cavities, two element components connected with the planes on the two sides of the corresponding cylinder correspondingly, slide sheet grooves with holes formed in the compression cavities, slide sheets and slide sheet back cavities, wherein the slide sheets slide between the slide sheet grooves and the two element components, the section of eachslide sheet is in a rectangular shape, and the slide sheet back cavities close the backs of the slide sheets on the slide sheet grooves. A high-pressure groove is formed in one of slide faces of eachslide sheet and the two sides of the corresponding slide sheet groove or slide faces of each slide sheet and the two element components, and a high-low pressure groove connected with the correspondingslide sheet back cavity is formed in the other one of the slide faces of each slide sheet and the two sides of the corresponding slide sheet groove or the slide faces of each slide sheet and the twoelement components. The volume control type rotary compressor has a volume change function, and the sliding loss and abrasion of the slide sheets are small.

The invention relates to a dual-sliding vane rotary compressor, a control method and an application thereof. The dual-sliding vane rotary compressor comprises a sealed shell of which the internal pressure is the pressure at the high-pressure side, wherein a compressing mechanism part and an electric motor part are arranged in the shell, the compressing mechanism part comprises a cylinder, a suction hole communicated with a cylinder compressing cavity and a piston eccentrically rotating in the cylinder compressing cavity, the cylinder is respectively provided with two sliding vanes and two discharge holes, the compressor is also provided with a pressure switching mechanism which can switch the pressure of a second sliding vane cavity between the pressure at the high-pressure side and the pressure at the low-pressure side, and the pressure switching mechanism can be used for realizing a one-sliding vane operating mode and a first sliding vane and second sliding vane simultaneous operating mode so as to change the displacement of the cylinder, thus finishing the capability control on the displacement of the cylinder by means of one cylinder. The invention has the advantages of small volume, less parts and low cost in the structure aspect and has the advantages of lowering slippage loss and improving compressor efficiency in the capability control mode aspect.

The fuel delivery system (2) has an engine section which comprises a stator with a carrier, a core and a coil. A rotor is provided opposite to the stator and rotates around a shaft. A separation body of a cylindrical mold is provided with a base and a bearing. The rotor is provided with multiple fuel channels.

Provided is a sealing member having increased sealing performance obtained by reducing loss caused by sliding between a side housing and a side seal which is provided to a side surface of a rotating body rotating inside a housing while moving around the inside of the housing. This sealing member 11 is provided between a rotating body 5 rotating inside a containing chamber 4 while moving around theinside of the containing chamber 4, and a sidewall 3 of the containing chamber 4, the containing chamber 4 being defined by a housing, and the sealing member 11 has a sliding surface S sliding on thesidewall 3. The sliding surface S is provided with: a first lubrication mechanism 21 disposed on one side in the longitudinal direction; and a second lubrication mechanism 21 disposed on the other side in the longitudinal direction and providing lubrication performance in a sliding direction different from that of the first sliding mechanism 21.

A refrigerant compressor having a compression element comprising sliding components made of metallic materials, wherein a mixed layer is formed by solid-dissolving molybdenum disulfide in at least one of the sliding faces of the sliding components, and a single molybdenum disulfide layer is further formed on the surface of the mixed layer. With this configuration, initial break-in is done using the single layer, and sliding loss is reduced. Even if the single layer peels off, because the molybdenum disulfide of the mixed layer is cleaved at a low friction coefficient, solid lubrication action is attained, the friction coefficient of the sliding section is lowered, and sliding loss is reduced.

The present invention provides a hermetic compressor which can reduce the slip loss and improve reliability and ability. The hermetic compressor accommodates a compress unit and an electric unit in a hermetic container, an eccentric part (7a) and a piston (4) disposed on a drive shaft driven by the electric unit are linked by a link rod (2), the adopted constitution has an inner ball surface (4a)disposed on the piston (4) and a ball part (2a) of the link rod (2) enclosed by the inner ball surface (4a) and linked to the piston (4) by a ball socket joint mechanism, the front end of the ball part (2a) has a small radius part (2d) with a distance to the center of the ball part (2a) smaller than the radius of the ball part (2a).