摘要:
The fluid machine with radial cylinders comprises cylinders (9) fixed with respect to the body (20) wherein the cylinders are peripherally spaced in the rotation plane of a crank (2) rotating with a driving shaft (1) of the machine; elements (12) distributing the fluid; it comprises, moreover, a piston (4, 34) of each cylinder placed in contact with the surface of said crank by means of sliding means (3, 39) and arranged within a jacket (6) of the cylinder with contact of the side (23), or side surface, of the piston in a restricted guide and seal area (7); for the guide function an annular edge (22); for the sealing function a sealing ring (25) is present close to the guide edge on the jacket and housed in an annular slot (24) associated with the guide edge; elements (5) are also present for maintaining the contact between the pistons and the crank.
摘要:
The friction bearing for hydraulic machine (5) comprising a surface in contact and sliding on the surface of the crank, the said surface is carried out on an element inserted (4) in ferrous material interposed between said crank (10) and the piston (9) or its connecting rod (8), there is also a layer inserted in anti-friction plastic material (3) anchored solidly on this by a layer in sintered metal (2), and has a layer of anti-friction plastic material with a minimum thickness (3) but which is slightly greater than the maximum dimension of the particles not captured by the filter of the hydraulic circuit where the hydraulic machine is inserted ; it also has the thickness of the element in ferrous material (1) of said bearing between 0.4 and 4 % of the sliding diameter on the hub (6) of the crank (10). The principal operation, standardization, and dimension reduction advantages, compared to the prior art, are also illustrated.
摘要:
The hydraulic machine with radial cylinders (3, 4, 5, 6 and 7) comprises pistons (8) with radial stroke, arranged in contact with an outer cam (13) and coplanar with said group of cylinders, each equipped with a roller on the path (12) of said cam, and it has, in each piston (8), a rolling bearing (9, 10, 11); moreover, the roller (10) and rolling bearing (9, 10, 11) are small to allow, in the alternating motion of the piston (8), introduction steps of said roller in the respective liner of the cylinder (3, 4, 5, 6 and 7) . In each piston (21), an anti-friction ferrule, (23) is placed in contact with the pin (22) or with an interpositioned and coupled support element (25) for said roller (20); said ferrule being coupled with the inner diameter of the roller (20) itself. Finally, static and dynamic O-rings each consisting of a metal ring (28, 31) are mounted with interference in the coupling on the sealing diameter (D) and housed in a throat (29, 36) with slight axial clearance.
摘要:
A hydraulic machine includes radial cylinders including, oscillating radial cylinders arranged in a crown or star of cylinder-piston units, the pistons of the groups are made slidable on a crankshaft or with a cam, or on interposed members concentric to it, and realizing the reciprocating motion in the oscillating cylinders. The oscillating cylinders are placed in contact with a surface of distribution concentric or corresponding to the surface of oscillation of the respective cylinder on which a distributor body is placed separate from the machine body and housed in a seat in the body, or part fixed to the body, of the hydraulic machine, and each distributor body is mobile in its seat under the action of the pressure of liquid in connection on the back surface of the distributor body against the surface of distribution of the oscillating radial cylinder subject to the distribution.
摘要:
A radial cylinder hydraulic motor comprises: oscillating hydraulic cylinders (1) driven to oscillate by means of an eccentric crankpin (2) formed on the motor shaft (3), the oscillating cylinder liners (4) being provided with trunnions (5) for oscillation about a parallel axis (C) to the axis (A) of rotation of the motor shaft which are coupled oscillably to the motor crankcase (6); reciprocating pistons (7) within said liners which are provided with a runner (8) for sliding over the outer surface (9) of said eccentric crankpin; and a rotary disk distributor (10, 23) coupled to the motor shaft for synchronized rotation therewith, adapted to place the conduits (12, 13) of the hydraulic circuit in fluid communication with the conduits (14) of the respective cylinders during the delivery and discharge strokes via ports of slanted or through-going configuration; the rotating disk of the distributor formed with a connection/supply means (38, 40) to the passageway between one face (27) and the inner wall of the distributor cover (41) incorporating a seal (28), with pressurized fluid in the area outside the seal; said passageway connection/supply means comprises a depression (38) extending parallel to the passageway; and it presents said passageway connection/supply means comprising at least one hole (40) in communication with one of the slanted configuration ports (24) to the depression.
摘要:
A radial cylinder hydraulic motor comprises: oscillating hydraulic cylinders (1) driven to oscillate by means of an eccentric crankpin (2) formed on the motor shaft (3), the oscillating cylinder liners (4) being provided with trunnions (5) for oscillation about a parallel axis (C) to the axis (A) of rotation of the motor shaft which are coupled oscillably to the motor crankcase (6); reciprocating pistons (7) within said liners which are provided with a runner (8) for sliding over the outer surface (9) of said eccentric crankpin; and a rotary disk distributor (10, 23) coupled to the motor shaft for synchronized rotation therewith, adapted to place the conduits (12, 13) of the hydraulic circuit in fluid communication with the conduits (14) of the respective cylinders during the delivery and discharge strokes via ports of slanted or through-going configuration; and advantageously includes the rotating disk of the distributor formed with a connection/supply means (38, 40) to the passageway between one face (27) and the inner wall of the distributor cover (41) incorporating a seal (28), with pressurized fluid in the area outside the seal. In another embodiment, it has the trunnions (5) formed with trough-like channels (30) in their outer surface (31), at the area of rubbing contact with the trunnion journals, into a branched layout (30) having a roughly trapezoidal projected shape, the channels in the branched layout being supplied pressurized fluid through one or more supply channels (32) from within the cylinder.
摘要:
A radial cylinder hydraulic motor having continuously variable displacement capabilities comprises: oscillating hydraulic cylinders (1) which are driven to oscillate through an eccentric crankpin (2) formed on the motor shaft (3) and carrying a radially movable ring (14) adapted to be shifted along the radial direction of the crankpin by actuation of opposed counteracting hydraulic cylinders (5, 6, 7) housed within the crankpin; a hydraulic control circuit for controlling and adjusting the positions of said counteracting hydraulic cylinders in a continuous manner; an electronic control circuit adapted to control the hydraulic control circuit and process signals from at least one position sensor arranged to detect the positions of said oscillating cylinders; a rotary joint (8) for hydraulic conduits (9, 10) through which said counteracting hydraulic cylinders are controlled and adjusted; wherein the sensor (45) is an angular position sensor placed close to the oscillation axis (C) of at least one oscillating cylinder (1) to measure, based upon changes in the signal, an angular position currently entered by the cylinder liner during the swing.
摘要:
The piston is provided with the possibility of sliding on a plane (C) parallel to the plane of rotation (B) of the pistons by means of a spacer (10) coupled also in oscillation on the semi-cylindrical surface (9) of the extremity of the drive shaft; the plate spring (6), interposed between the lower part (7, 8) of the piston and the said extremity, with the semi-cylindrical spacer (3) inside the double diameter hole (4, 5), ensures contact, also in the presence of variations in motion and/or pressure. The articulation with prevalent unloading of the thrust from the pistons is such that the load transmission component (63, 79) is exposed to the pressure of the fluid over an area which is much greater than that of the piston (65, 77). The seal system with compensated ring comprises rings (85) having at least two internal symmetrical protuberances (86), of which one is provided with an outward incision (87); a pair of rings is assembled in a single seat with the rings arranged in mirrored positions with respect to the axis of symmetry (SM), in such a way as to cover the protuberance/s with incision with that/those without; the rings may be cut (89) to facilitate assembly in seats that may not be dismantled, but in a position away from the zone of the protuberances and the axis of symmetry.
摘要:
A hydraulic machine includes radial cylinders including, oscillating radial cylinders arranged in a crown or star of cylinder-piston units, the pistons of the groups are made slidable on a crankshaft or with a cam, or on interposed members concentric to it, and realizing the reciprocating motion in the oscillating cylinders. The oscillating cylinders are placed in contact with a surface of distribution concentric or corresponding to the surface of oscillation of the respective cylinder on which a distributor body is placed separate from the machine body and housed in a seat in the body, or part fixed to the body, of the hydraulic machine, and each distributor body is mobile in its seat under the action of the pressure of liquid in connection on the back surface of the distributor body against the surface of distribution of the oscillating radial cylinder subject to the distribution.