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

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.

To provide 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.

An object is to provide a highly efficient compressor at a low cost while reducing sliding losses of a vane and inhibiting a leakage from the vane and a compression member to improve a workability of the vane. The compressor comprises: the compression member whose upper surface (one surface) crossing an axial direction of a rotary shaft is inclined continuously between a top dead center and a bottom dead center and which is disposed in a cylinder to be rotated by the rotary shaft and which compresses a fluid sucked from a suction port to discharge the fluid via a discharge port; and a vane which is disposed between the suction port and the discharge port to abut on the upper surface (one surface) of the compression member and which partitions a compression space in the cylinder into a low pressure chamber and a high pressure chamber, and the upper surface of the compression member comprises: a flat surface constituted in a predetermined region centering on an intermediate point between the top dead center and the bottom dead center; and curved surfaces gradually approaching the top dead center and the bottom dead center continuously from the flat surface.

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.

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.

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 satisfythe 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.

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 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 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.

Provided is a sealing member which reduces sliding loss between a side seal provided on a side surface of a rotating body which rotates while swinging in a casing and a side casing, and improves sealing performance. A sealing member 11 is provided between the rotating body 5 that rotates while swinging and the side wall 3 of the storage room 4 in the storage room 4 divided by the casing, and has a sliding mechanism that slides relative to the side wall 3 . surface S, wherein the sliding surface S has a first lubricating mechanism 21 disposed on one side in the longitudinal direction, and a second lubricating mechanism disposed on the other side in the longitudinal direction and exerting lubricating performance for a sliding direction different from that of the first lubricating mechanism 21. Lubrication mechanism 22.

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.

The invention discloses a double-cylinder rotary compressor, which comprises: a first air cylinder, a second air cylinder, an intermediate bearing plate and a crankshaft. The intermediate bearing plate is located between the 1st cylinder and the 2nd cylinder. The main bearing connected to the 1st cylinder and the end plate connected to the 2nd cylinder. The crankshaft includes a main shaft that slides on the main bearing, a first eccentric shaft and a second eccentric shaft that drive the first piston and the second piston, respectively, and an intermediate shaft located between the first eccentric shaft and the second eccentric shaft. At least one of the first eccentric shaft and the second eccentric shaft is separated and combined with the crankshaft, and the intermediate bearing plate is in sliding fit with the intermediate shaft. According to the double-cylinder rotary compressor of the embodiment of the present invention, the reliability of the crankshaft can be improved, the crankshaft can run at high speed, the sliding loss is reduced, the compression efficiency is improved, and the eccentricity of the crankshaft can be enlarged.

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).