203 results about "Rotational stability" patented technology

A long-distance blast banger including a cartridge loaded with a blast banger made up from plastic material. The blast banger encompasses a sound explosives cup and a delay cup. The sound explosives cup is loaded with a sound explosives agent having components including perchloryl potassium, magnesium powder and aluminum powder. A sufficient sound value is acquired through appropriate compacting of the sound explosives cup, and therefrom realizes uniform shattering of the cup into small fragments that are insufficient to cause injury. Furthermore, at least two helical grooves extending from a bottom to a top of the cartridge are defined on an inner wall thereof, and ear attachments are configured on a base of an outer wall of the blast banger so as to correspond with the helical grooves, thereby engendering a spinning stability effect during flight time of the blast banger, reducing wind resistance, and thus increasing flight range.

The invention discloses a rotary table structure and a machine tool, and belongs to the technical field of rotary tables. The rotary table structure mainly comprises two servo motors, two speed reducers, two driving gears, a driven gear, piston clamping mechanisms, an angle encoder and crossed roller bearings, the piston clamping mechanisms are symmetrically arranged on the upper side and the lower side of a gear ring of the driven gear, oil is fed into an oil cavity in each piston clamping mechanism after a table rotates for a required angle, upper pistons and lower pistons simultaneously clamp the driven gear, and braking and locking are carried out by the aid of friction force between each piston and a corresponding end surface of the driven gear. The rotary table structure is designed for small and medium machine tools, rotational stability and operational reliability of the table are realized by an anti-backlash effect of the piston clamping mechanisms and the double motors, and the rotary table structure is high in rotation precision and simple and compact in structure and is time-saving and labor-saving.

A disc carrier for an optical disc drive includes a recession integrally formed thereon and an axial tube projecting from a central portion of a bottom wall of the recession. A shaft extends through the axial tube. An engaging length between the axial tube and the shaft is increased to improve rotating stability of the disc carrier. A support member is fixed in the recession and includes a peripheral support edge along a periphery thereof. The support member is in contact with and thus supports plural clamping members of a clamping device.

The invention relates to multistage axial flow air compressor treatment casings, and discloses a self-circulation treatment casing for simultaneously improving stator corner region flowing. The self-circulation treatment casing comprises a target rotor blade, a downstream stator blade, a casing body and an air guide pipe structure located in the casing body. A flow guide cavity structure penetrating the whole circumferential direction is arranged at the position, on the front edge of a target rotor blade tip, in the casing body. Flow guide cavity outlet front guide vanes used for adjusting the jet flow direction are circumferentially and evenly arranged on the front edge of a flow guide cavity outlet, and the outlet directions of the guide vanes are consistent with the pre-rotating direction of the target rotor blade tip. According to the characteristic of stage-by-stage pressurization of a multistage air compressor, self-adaptive suction and jet flow are formed under the action of differential pressure of a downstream stator blade combined suction groove and the flow guide cavity outlet of the target rotor blade tip; separated flowing of a stator three-dimensional corner region of the air compressor is effectively restrained, and meanwhile moving blade rotating stall is prevented from happening too early through circumferentially-even jet flow with the pre-rotating direction consistent with that of the rotor blade tip; the rotor blade rotating stability and margin are increased; and the stable work condition range of the air compressor is widened.

The invention discloses a coupler for an electric bus motor. The coupler comprises a body (1), a flange (2) and a step-shaped through hole. A shaft fastener containing cavity (3) is formed in one end of the through hole, a conical hole (4) with the inner diameter gradually decreasing in the direction from outside to inside is formed in the other end of the through hole, and two key grooves (5) formed in the axial direction are symmetrically formed in the surface of the conical hole (4). The invention further discloses manufacturing process. The coupler for the electric bus motor and the manufacturing process thereof have the advantages that the conical hole structure further improves the coaxiality of a connecting shaft and the coupler, balance performance is good, and the rotating stability of the connecting part is enhanced. A key groove structure further reinforces the coaxiality of the connecting shaft in the conical hole and a connecting shaft fixedly connected with the flange. In the manufacturing process, location operation is simple, and locating is stable and accurate, so that processing precision of a workpiece is ensured, quality is stable and reliable, the requirement for design precision and the requirement for interchangeability of motor general assembly are ensured, and manufacturing is safe and protects the environment without pollution.