45results about How to "Increase tangential force" patented technology

The invention provides a hydrodynamic force conversion device, and relates to the field of hydrodynamic force conversion. The hydrodynamic force conversion device comprises a stator, a rotor, an obstruction plate and sliding blocks; the rotor is rotatably connected with the stator, and a ring cavity is formed between the opposite bottom walls of the stator and the rotor; an inlet and an outlet are formed in the stator, the obstruction plate is fixedly connected to the stator and is in sliding connection with the rotor, the obstruction plate is located in the ring cavity and located between the inlet and the outlet, and sliding grooves are formed in the end face, corresponding to the ring cavity, of the rotor; each sliding groove is internally provided with one sliding block; the sliding blocks stretch out of the sliding grooves, the ring cavity is divided into two sub cavities with unequal pressures through the sliding blocks and the obstruction plate, the inlet and the outlet are located in the two sub cavities correspondingly, and the sliding blocks retract into the sliding grooves to cross the obstruction plate. The hydrodynamic force conversion device is simple in structure, and high in conversion efficiency of kinetic energy and mechanical energy.

The invention provides a vibration damping rotor iron core, a vibration damping rotor and an electric machine. The vibration damping rotor iron core comprises an inner rotor iron core and an outer rotor iron core. The outer rotor iron core can be sleeved on the outer periphery of the inner rotor iron core, and a vibration damping space containing vibration damping material can be formed between the inner rotor iron core and the outer rotor iron core. The inner rotor iron core is provided with a first groove along the radial direction, and the outer rotor iron core is also provided with a second groove along the radial direction, and the first groove can be arranged opposite to the second groove. Also included is a bridge core capable of simultaneously penetrating into the first groove andthe second groove to form a circumferential relative positioning of the inner rotor iron core and the outer rotor iron core. The invention can realize the limit of the vibration damping material on the circumference, strengthen the tangential force of the vibration damping material on the circumference, prevent the vibration damping material from falling off due to the force, ensure the reliability of the rotor when the rotor rotates at high speed, and strengthen the reliability of the motor.

The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the periphery of the disc. Said disk (1) is arranged in a ring groove (7) of the piston and respectively has a ring groove side (6) opposing the piston head and a parallel ring groove side (5) facing the piston head. The aim of the invention is to achieve an improved oil scraping action compared to that of prior art, while reducing the friction and the abrasion of the bearing surface. To this end, the disk flanks (2, 2') extend radially outwards to the bearing surface (h), at an angle (A), in a convergent manner, in such a way that when the flank is placed on the ring groove side (5) facing the piston head, the disc is only in contact with the cylinder wall (8) with the vertex line (3) thereof, and when one of the disc flanks is placed on the ring groove side (6) opposing the piston head, the disc is only in contact with the cylinder wall with a first section (I) of the bearing surface (h) thereof. The cross-section of the bearing surface (h) of the disc (1) is characterised by: a first section (I) having an asymmetrical form following a second degree polynominal with the formula h(x)= ax + bx<2>, wherein x represents bearing surface co-ordinates in the cartesian co-ordinates system in mm, and a, b represent coefficients where a is defined by the ratio of the axial flank play of the discs to the width of the disks, and b is defined as the value of the bearing surface curvature; a carrying vertex (II) h(x=0) embodied as an edge; and, a third section (III) of the asymmetrical form following the function h(x)= cx<2>, where c is a multiple of b.