摘要:
The subject of the invention is a cast part with high static mechanical strength, and for fatigue and hot creep, made of aluminum alloy of composition: Si: 3-11%, preferably 5.0-9.0% Fe
摘要:
A single-headed piston type swash-plate compressor has a cylinder block having cylinder bores in which a plurality of pistons are slidably received. A first housing is attached to a first end of the block to form a crank chamber therebetween, and a second housing is attached to a second end thereof to form an annular suction chamber and a central discharge chamber therebetween. The chambers are partitioned by an annular wall portion projected from an inner wall of the second housing such that the suction chamber surrounds the discharge chamber. A drive shaft rotatably is extended through the crank chamber, and a conversion mechanism is provided on the shaft for converting a rotating movement of the shaft into a reciprocating movement of each piston in the corresponding bore such that a suction stroke and a discharge stroke are alternately executed therein. During the suction stroke, a fluid is introduced from the suction chamber into the bore, and during the compression stroke, the introduced fluid is compressed and discharged from the bore into the discharge chamber. The cylinder block has a portion extended radially and outwardly from a side thereof, and the portion has a damping chamber formed therein. The discharge chamber has an elongated portion extended radially and outwardly therefrom, the elongated portion being in communication with the damping chamber through a small passage formed in the extended portion of the block.
摘要:
An axial multi-piston compressor includes a drive shaft, a cylinder block having cylinder bores formed therein and surrounding the drive shaft, and a plurality of pistons slidably received in the respective cylinder bores, wherein the pistons are successively reciprocated in the cylinder bores by a rotation of the drive shaft so that a suction stroke and a discharge stroke are alternately executed in each of the cylinder bores. During the suction stroke, a fluid is introduced into the cylinder bore, and during the compression stroke, the introduced fluid is compressed and discharged from the cylinder bore such that a residual part of the compressed fluid is inevitably left in the cylinder bore when the compression stroke is finished. The compressor further includes a rotary valve for allowing the residual part of the compressed fluid to escape from the cylinder bore into another cylinder bore after the suction stroke is executed in the former cylinder bore over a given short period of time.
摘要:
A cylinder and piston construction for a compressor or vacuum pump has a cylinder defined by co-axial cylinder and guideway sleeves. The guideway sleeve is larger in diameter than the cylinder sleeve and the cylinder sleeve extends axially into the guideway sleeve. A piston has a cylindrical base which is guided via skirt bearings in the guideway and a head which extends from the base into the compression chamber defined by the cylinder sleeve and has a piston ring which forms a sliding seal with the cylinder sleeve. An annular cavity is defined between the piston head and the piston base into which the cylinder sleeve extends so that the top skirt bearing is positioned closer to the top of the piston head and further away from the bottom skirt bearing so as to steadily guide the piston head in the cylinder sleeve, thereby reducing wear and increasing the life of the pump.
摘要:
A hydraulic transmission device operable to translate hydraulic energy into mechanical energy and vice versa. The device has a housing 14 having a close end portion and an open end portion in the longitudinal direction. The housing supports therein a drive shaft 11, a retainer 12, and a cylinder block 13 which have an integral structure. A recess is formed at a substantially central location of the end surface of the cylinder block 13 that is on the side of an open end of the housing, and a cover 15 closing the open end of the housing has a protruding portion 15A which extends through a port plate 23 to be engaged with the recess of the cylinder block through a bearing 17. A plurality of pistons are disposed in the cylinder block and are kept in tight engagement with a swash plate fixed to the closed end portion of the housing at a constant tilt angle. The device acts as either a swash plate type axial piston pump or motor of this type as the drive shaft rotates.
摘要:
A fluid pressure device of the axial plunger type including a housing, a rotatable shaft within the housing, a rotatable cylinder block operatively connected to the shaft and having a plurality of axial bores, plungers slidably mounted, respectively, within the bores, a valve plate located in abutment with an end surface of the cylinder block and having inlet and outlet ports which communicate successively with the bores as the cylinder block rotates, a swash plate pivotally supported upon the housing and operatively connected to the plungers for causing the plungers to reciprocate, and plunger shoes positioned between the plungers and the swash plate, the shoes being made of either a high tensile aluminum alloy, titanium, or a high tensile titanium alloy and comprising a slidable bearing surface made of a high load-bearing alloy which is adapted to bear against a planar surface of the swash plate.
摘要:
A swash plate which is made of an iron-based or aluminum-based material and is used in a single-side compression type swash-plate compressor. A flame-sprayed copper-based alloy layer is formed on at least a sliding surface with a first shoe in a compression space side. The flame-sprayed copper-based alloy layer contains in total, by weight percentage, not less than 0.5% and not more than 50% of one or more kinds selected from not more than 40% of lead, not more than 30% of tin, not more than 0.5% of phosphorus, not more than 15% of aluminum, not more than 10% of silver, not more than 5% of silicon, not more than 5% of manganese, not more than 5% of chromium, not more than 20% of nickel, and not more than 30% of zinc and the balance essentially copper and impurities. Electrolytic plating, electroless plating, lubricant coating, phophatizing or hardening is applied on at least a second sliding surface with a second shoe in the side opposite to the compression space.
摘要:
An axial multi-piston compressor includes a drive shaft, a cylinder block having cylinder bores formed therein and surrounding the drive shaft, and a plurality of pistons slidably received in the respective cylinder bores, wherein the pistons are successively reciprocated in the cylinder bores by a rotation of the drive shaft so that a suction stroke and a discharge stroke are alternately executed in each of the cylinder bores. During the suction stroke, a fluid is introduced into the cylinder bore, and during the compression stroke, the introduced fluid is compressed and discharged from the cylinder bore such that a residual part of the compressed fluid is inevitably left in the cylinder bore when the compression stroke is finished. The compressor further includes a rotary valve for allowing the residual part of the compressed fluid to escape from the cylinder bore into another cylinder bore governed by the compression stroke.
摘要:
An axial multi-piston compressor having a drive shaft which rotates and a cylinder block having a multiplicity of cylinder bores and pistons within the cylinder bores. The cylinder block is associated with a crank chamber containing the fluid to be compressed and a lubricating oil mist. The peripheral wall of the crank chamber having a groove on the peripheral surface which groove collects oil and directs the oil to the shaft seal. The groove is partially curved in a direction counter to the direction of rotation of the shaft.
摘要:
A reciprocating compressor drive for driving a pair of opposed horizontally arranged compressor pistons. The pistons are carried by a pair of coaxial horizontal piston rods which are fixed to a crosshead situated between the piston rods and formed with a vertical slot receiving a slide block connected to a crank pin which is driven by a rotary crank drive. A pair of guide bars, which are parallel to the piston rods, extend through upper and lower bores of the crosshead, these bores carrying suitable bearings which slide along the guide bars. A pressurized lubricating system is provided for lubricating components such as the bearings which slide on the guide bars and the crank pin which is received in the slide block, the crosshead preferably being made of a light-weight material such as a plastic and carrying steel guide strips which slidably engage the slide block, the latter as well as the bearings which engage the guide bars preferably being made of bronze while the guide strips which engage the slide block and the guide bars which engage the bearings are preferably made of steel.