摘要:
A compressor has an odd number of aligned pairs of cylinder bores. A double-headed piston is accommodated in each aligned pair of bores. The time at which gas is discharged from each cylinder bore is different from that of all of the other cylinder bores. The compressor has a pair of reducing devices, one reducing the pulsation amplitude of the gas discharged from the front cylinder bores and the other reducing the pulsation amplitude of the gas discharged from the rear cylinder bores. The reducing devices reduce the gas pulsation amplitudes of the front and rear cylinder bores at a substantially equal rate. Each reducing device includes a discharge chamber for receiving the gas discharged from the associated cylinder bores and a discharge passage connected to the discharge chamber. The discharge chambers of the reducing devices have equal volumes, and the discharge passages of the reducing devices have equal lengths and equal cross-sectional areas. This structure improves the vibration characteristics of the compressor and thus reduces noise.
摘要:
A compressor is described having a pair of casings fastened together by a plurality of bolts. A piston is located for reciprocation within a cylinder bore formed in the casings. A cam plate is mounted on a rotary shaft supported by the casings to reciprocate the piston. The cam plate is held by the casings between a pair of thrust bearings. The casings include adjoining surfaces fitted to each other and a member sandwiched between the adjoining surfaces of the casings for absorbing dimensional tolerances of the casings, cam plate and thrust bearings according to the deformation of the member.
摘要:
An improved compressor that is designed to minimize shock and vibration during start-up includes a plurality of pistons, each of which is positioned for movement within a cylinder in order to compress a gas, and conventional motive structure for driving the pistons. Advantageously, the compressor includes a sensor for sensing, from a condition that exists within the compressor, when the compressor is in a start-up phase. The sensor is designed to be operative regardless of the position of the pistons during start-up. Pressure relief structure, responsive to said sensor, is provided for relieving pressure in at least one of the cylinders when the sensor indicates that the compressor is in the start-up phase. This minimizes shock and vibration during the start-up.
摘要:
It is an object of the present invention to reduce the abrasion at a pressure receiving portion of the cylinder block, without increasing the manufacturing cost, even when the outer rings of a bearing are jointly rotated and eccentrically fluctuated. The cylinder blocks are made of aluminum alloy comprising, by weight, 1.5 to 3.5% of Cu, 13 to 16% of Si, 0.5% or less of Mg, 1.0% or less of Zn, 1.0% or less of Fe and the remainder of Al. The matrix, except for primary Si crystal, is relatively soft. Primary Si crystals which each independently project from the pressure receiving portions tend to be pushed into the base material by the outer rings of the thrust bearings, so that the levels of primary Si crystals are easily made to be approximately uniform. As a result, the interference and thrust load from the outer rings can be appropriately supported by a large number of primary Si crystals, and a jointly rotating motion and an eccentric fluctuation can be appropriately supported by a large number of primary Si crystals under severe operating conditions.
摘要:
A reciprocating piston type compressor for compressing refrigerant gas is provided with a main housing which includes a plurality of parallel cylinder bores arranged around the longitudinal axis of the cylinder block. The main housing has first and second cylinder blocks connected to each other by a plurality of bolts, the cylinder blocks including inner clamping faces and abutting faces. A plurality of pistons are slidably provided within the cylinder bores. An axially extending drive shaft is supported by the main housing for rotation through a pair of bearings. A swash plate is mounted on the drive shaft for rotation with the drive shaft. A pair of thrust bearings are provided between the swash plate and the inner clamping faces of the cylinder blocks to clamp and hold the swash plate therebetween. The clamping force on the thrust bearings from the inner clamping faces is controlled so that the clamping force does not exceed a predetermined allowable upper limit when the compressor is assembled.
摘要:
A compressor includes a housing body and a drive shaft rotatably supported in the housing body. A swash plate is mounted on the swash shaft. Cylinder bores are defined in the housing body. Pistons are operably coupled to the swash plate and are disposed in the cylinder bores. The swash plate converts a rotation of the swash shaft to a reciprocating movement of the pistons along an inner surface of the cylinder bores. Each piston compresses gas supplied from a suction chamber to the associated cylinder bore and discharges the compressed gas to a discharge chamber. Deformation of the inner surface of each cylinder bore is reduced by utilizing pressure of the gas compressed in the cylinder bore.
摘要:
A reciprocating piston type compressor having a cylinder block, a plurality of cylinder bores, and at least a housing closing an end of the cylinder block. The housing contains a suction chamber for a refrigerant gas to be compressed and a discharge chamber for the compressed refrigerant gas discharged from the cylinder bores in response to reciprocation of a plurality of pistons. The compressed gas is discharged through discharge ports closed by a discharge valve element having a plurality of integral discharge reed-valves movable between a closed positions and a predetermined open positions. The open position is defined by a stop unit integrally formed in an inner wall of the housing. The stop unit has a plurality of flat stop faces formed on the inner wall to permit free ends of the discharge reed-valves to come into contact engagement therewith, when the discharge reed-valves are moved from the closed positions to the open positions.
摘要:
A reciprocating compressor includes reciprocating pistons moved by a swash plate. A housing member is attached to one end of the cylinder block via a valve plate. A discharge chamber is formed in the peripheral region in the housing member, and a suction chamber and an oil chamber are formed in the central region in the housing member in an axially juxtaposed relationship. Alternatively, a suction chamber is formed in the peripheral region, and a discharge chamber and an oil chamber are formed in the central region. The oil chamber is connected to the suction chamber by an oil return passage. A centrifugal type or collision type oil separating device is arranged in the discharge chamber above the oil chamber in the housing member.
摘要:
A swash plate type compressor is provided with a front and rear cylinder blocks having a crank case connected to a suction port. The cylinder blocks include a plurality of cylinders, and are connected to a front and rear housing sections for covering the cylinders. Each housing section contains a discharge chamber. A drive shaft is rotatabley supported by the cylinder blocks. A swash plate is mounted on the drive shaft and is rotatably disposed within the crank case. Two-head pistons move within their respective cylinders in cooperation with the swash plate. The refrigerant is drawn into, and compressed in each cylinder. Thereafter, it is discharged into the external refrigerating circuit through the front and rear discharge chambers, and a final discharge port. A discharge passage includes a hollow primary passage which is provided within the drive shaft. The primary passage communicates with the front and rear discharge chambers. A groove is provided on an inner wall of the primary passage. As the drive shaft rotates, the groove separates the refrigerant from the lubricating oil mixed with the refrigerant. An oil passage is provided between the discharge chamber and the crank case. The separated oil flows from the discharge chamber to the crank case, through the oil passage, and is used again in lubricating the components of the compressor.