摘要:
The invention relates to a dual-mass coupling flywheel. The aim of the invention is to produce a dual-mass coupling flywheel in a simple manner which can be coupled when empty. This is achieved by virtue of the fact that said dual-mass coupling flywheel comprises a separation area which is arranged between a damping system and a suspension system of a torsion oscillation damping.
摘要:
A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission mechanism disposed in the chamber. The rotation transmission mechanism includes a gear system having a high-speed power input section operably connected to the motor, and a low-speed power output section adapted for connection to a drill pipe. The rotation transmission mechanism includes an anti-vibrational inertial body forming part of the high-speed power input section for storing rotational energy to even-out rotary speed variations and resist the generation of vibrations during operation. The inertial body includes a downwardly open recess in which the motor casing extends, wherein the motor projects downwardly past a bottom wall of the housing.
摘要:
A system for the modification of the rigidity/damping properties of structural joints comprises at least an intermediate structure (3) to receive, on both sides, two structures (1, 2) to be coupled; releasable blocking means (6) to immobilize, in a coupled condition, said two structures to be coupled and said intermediate structure; first and second sets of bistable components (7, 8), the structural resistance features of the components of the first set being different from those of the second set; the components of the first set being internally connected to one of said structures to be coupled and to said intermediate structure; the components of the second set being internally connected to one and other of said structures to be coupled; said bistable components being in an unstable condition when all the mentioned structures are coupled together. The invention is applicable to the field of space vehicles.
摘要:
A flywheel hub (26) includes an annular hoop (28) and a pair of compliant diaphragms (30, 32) which are connected by the hoop (28). The diaphragms (30, 32) have apertures (34) to receive a flywheel shaft (22) and the hoop (28) is sized to receive an annular rim (24). The diaphragms (30, 32) achieve their compliance principally with a serpentine, radial cross section. The hub (26) is preferably realized with fiber and matrix composites. Because the compliant hub (26) tends to match radial expansions of adjoining flywheel components, joint integrity between components is enhanced. In addition, the hub (26) permits the rim (24) to position its center of mass on the rotational axis (21) to reduce rim vibrations. Axial spacing (66) of the diaphragms (30, 32) provides moment stiffness to limit and control the rim deflection caused by, for example, gyroscopic precession forces.
摘要:
A flywheel hub (26) includes an annular hoop (28) and a pair of compliant diaphragms (30, 32) which are connected by the hoop (28). The diaphragms (30, 32) have apertures (34) to receive a flywheel shaft (22) and the hoop (28) is sized to receive an annular rim (24). The diaphragms (30, 32) achieve their compliance principally with a serpentine, radial cross section. The hub (26) is preferably realized with fiber and matrix composites. Because the compliant hub (26) tends to match radial expansions of adjoining flywheel components, joint integrity between components is enhanced. In addition, the hub (26) permits the rim (24) to position its center of mass on the rotational axis (21) to reduce rim vibrations. Axial spacing (66) of the diaphragms (30, 32) provides moment stiffness to limit and control the rim deflection caused by, for example, gyroscopic precession forces.
摘要:
A fly wheel arrangement comprising a rotatable axle (1), a ring (4) essentially forming the rotating mass of the fly wheel and a connecting means (5) made from fibre-reinforced connecting the ring (4) with the axle (1) or with a part rotating herewith. The connecting means (5) is connected to the ring (4) at its outer end portion and to the axle (1) or a part connected hereto at its inner end portion. The connecting means (5) has essentially the shape of a cylinder or a conical shell.
摘要:
A method for the production by resin injection moulding of fibre reinforced articles from fibrous material bonded in a curable matrix material which articles comprise two or more spokes (2, 3, 4) extending from a hub portion (1), each spoke (2, 3, 4) being in the form of a loop is characterised in that the fibrous material is arranged such that at least as many rovings (13, 14, 15 or 22, 23, 24) of the fibrous material as there are spokes (2,3,4) extend in continuous paths from the hub portion (1) around each of the spokes, each of the rovings being overlaid for at least part of its length by each of the other rovings. The method is suitable for the production of intricately shaped articles which are to be highly stressed for example by being subjected to high rotational speeds.
摘要:
A rolling bearing of a balancer shaft device is positioned on an imaginary circle concentric with an axis of a shaft portion of a balancer shaft as viewed in a radial cross-section, and includes a cylindrical portion which covers the shaft portion. An outer circumferential surface of the cylindrical portion defines an inner ring raceway surface of an inner ring member on which a rolling element of the rolling bearing rolls. A part of the shaft portion of the balancer shaft, at a position on which the rolling bearing is disposed, has a cutout formed at a portion which does not contribute to offsetting of rotational vibration of a crankshaft.