摘要:
Rapid wear in a gear pump construction due to shaft deflection during pump operation and of the sort including a housing having an interior wall defining a pumping chamber, opposed inlet and outlet ports meshed gears within the chamber, a pair of shafts mounting the gears and bushings journalling the shafts is avoided by providing at least some of the bushings near their ends remote from the gears and on their sides remote from the outlet with radially outwardly opening slots extending generally transverse to the shafts.
摘要:
A balancing weight device for scroll-type fluid machine including a balancing weight rotatably secured to the orbital scroll member of the machine through a bearing, with the balancing weight producing a centrifugal force balancing the centrifugal force produced in the orbital scroll member during operation of the fluid machine.
摘要:
A fluid displacement apparatus is disclosed which includes a housing having a front end plate, a fixed fluid displacement member and an orbiting fluid displacement member. The fixed and orbiting members interfit to make a plurality of line contacts to define sealed off fluid pockets. A driving mechanism, including a drive shaft, is disposed within the housing and is connected to the orbiting member to effect orbital motion of the orbiting member upon rotation of the drive shaft. The drive shaft is rotatably supported by the front end plate through an angular bearing disposed within the front end plate. The pressure cone apex of the angular bearing coincides with the driving point of the orbiting member. A thrust race is disposed on one axial end surface of the angular bearing, and a ring plate is disposed within the front end plate facing the thrust race at a predetermined axial distance. A thrust bearing is placed in the axial gap between the thrust race and the ring plate to carry the thrust force from the angular bearing.
摘要:
An internally axed crankless piston engine wherein a piston rotor has at least one piston which moves through a circular annulus defined between a fixed inner casing and a fixed radially outer casing. A stopping piston is provided which defines the terminus of the annulus at one point on its circumference and an inflow duct issues into the annulus via an opening in the fixed inner wall of the inner casing or is arranged in the fixed radially outer casing wall adjacent to the stopping rotor while adjacent to the stopping rotor an outflow duct is provided in a fixed radially outer facing wall of the outer casing.
摘要:
A rotation preventing/thrust bearing device for an orbiting member type fluid displacement apparatus prevents rotation of an orbiting member during orbital motion and carries axial loads from the orbiting member. The rotation preventing/thrust bearing device of the present invention includes a fixed ring which is attached to a housing and an orbit ring which faces the fixed ring and is attached to an end surface of the orbiting piston. These rings have a plurality of corresponding pockets which face each other. Each pocket on the fixed ring faces a pocket on the orbiting ring corresponding in size, pitch and radial distance from the center of the respective rings. A predetermined number of these pockets function as rotation prevention pockets; these rotation prevention pockets have a diameter or size slightly smaller than the remaining pockets. These rotation preventing pockets cooperate with spherical balls, one of which is placed within each facing pair of corresponding pockets, to prevent rotation of the orbiting piston. Thus, while all the spherical balls carry axial loads, only a predetermined number interact with the pockets to prevent rotation of the orbiting member. This predetermined number is greater than or equal to three but smaller than the total number of balls and pockets.
摘要:
A rolling thrust bearing for use in a scroll type positive fluid displacement apparatus is disclosed. In the invention, a plurality of ball bearings spaced apart in cavities formed in a bearing cage are operative to transmit an axial force between a supporting frame and an orbiting scroll member. The bearing cage rotates within a groove in which it is seated due to frictional forces between its flank surfaces and the sides of the groove. In a first embodiment, the diameter of the cavities is substantially larger than the diameter of the ball bearings, and the bearings are free to orbit within the cavities as the bearing cage rotates. In the second embodiment, the cavities are only slightly larger in diameter than the ball bearings, but the radial width of the bearing cage is substantially less than the width of the groove, and the bearing cage and the ball bearings together describe an epicycloidal path about the central axis of the bearing cage. In both embodiments, the ball bearings seated within the cavities contact adjacent bearing races over a constanty changing portion of their surface. This substantially extends the operational life of the thrust bearing.
摘要:
A scroll fluid apparatus in which a bearing of a plurality of bearings journaling a crankshaft which is closest to an orbiting scroll is located in a plane extending through the point of application of force transmitted between the orbiting scroll member and the crankshaft and disposed at a right angle to the center axis of the crankshaft, to minimize the moment of load applied to the bearings.
摘要:
A thrust bearing/coupling component for use in scroll-type apparatus which may be a compressor, expander, fluid pump or vacuum pump. The resulting apparatus is particularly suited for use as auxiliary equipment in automotive power systems. The component of this invention comprises rotating or oscillating load carrying members, preferably ball bearings, confined within facing indentations cut in the orbiting scroll member end plate surface and an associated surface in a member stationary with respect to the orbiting scroll member. The thrust bearing/coupling component couples the stationary and orbiting scroll members in a predetermined angular relationship and it may be used to carry either expansive or compressive axial loads on the scroll members to achieve efficient radial sealing of the moving scroll fluid pockets while controlling surface wearing so that the scroll apparatus may be operated for an extended period of time without servicing.
摘要:
A pneumatically operated vane-type motor for driving medical or dental handpieces. A stator housing forms a rotor chamber in which a rotor is mounted, the rotor having axial slots in which rotor vanes are radially movably mounted. The rotor rotates about an axis which is parallel to but spaced from the axis of a cylindrical inner surface of the housing which is circular in cross-section. A co-axial bearing ring is rotatably mounted in the inner surface of the housing, and the inner surface of the bearing ring is engaged by the outer ends of the vanes.
摘要:
A screw pump having a unit which includes a drive screw and at least one impeller screw that meshes therewith, arranged within a casing that sealingly encloses the screws, each impeller screw on the pressure side being provided with a pin mounted in a sleeve, the interior of which communicates with the suction side through channels in a pump housing and the drive screw. There is a disc-like packing between an end surface of each sleeve and an end wall that closes the pressure side of the housing, through which end wall the channels partially extend, and through which a drive shaft is extended for the drive screw. The invention provides that each sleeve has one or more deformation zones on a side thereof remote from the packing, and facing a fixed surface in the housing, which zones are arranged to abut the fixed surface in the housing.