35results about How to "Accurate radial positioning" patented technology

A single probe system is utilized to quickly obtain uncontaminated formation fluid samples. The single probe includes an outer guard tube and an inner sampling tube which is slightly recessed relative to the outer tube such that the pressure at the front face of the probe is substantially uniform. Each tube is coupled to its own pump which controls the flow rate of the fluid moving through that tube. Knowing the size of the sampling tube relative to the size of the outer probe tube, and optionally based on relative viscosities of formation fluids and filtrates, the pumps are caused to generate a particular flow rate ratio through the tubes such that an appropriate pressure is maintained at the front face of the probe and such that the fluid flowing through the sampling tube is substantially uncontaminated.

The invention discloses a self-locking steel bar connecting grouting sleeve which comprises a sleeve body. The sleeve body is provided with a grouting hole and a grout outlet hole, a grouting cavity communicated with the grouting hole and the grout outlet hole is formed in the sleeve body, the inner wall of the grouting cavity is provided with ribs or corrugations, and the inner wall of the grouting cavity is also provided with multiple clamping tongues. On one hand, when steel bars are inserted into the self-locking steel bar connecting grouting sleeve, a mechanical anchoring force can be effectively provided through the self-locking effect between the steel bars and threaded steel bar ribs; on the other hand, when connected steel bars inserted into prefabricated members have deviations,and when the steel bars are inserted into the grouting sleeve, the situation of wall attachment or eccentricity occurring during connection of the self-locking steel bar connecting grouting sleeve canbe effectively avoided through appropriate position correction of the steel bars due to the vertical radial effect of the clamping tongues.

In a system for writing a plurality of information tracks between adjacent portions of a reference track on a rotatable medium, advantage is taken of the fact that laser beam dithering a cross an edge of a reference track produces signals which are analyzable to determine much more exact radial positions. A pattern of bits is written on the medium with a known spacing between bits. This may be at the time of disk manufacture or later. As these bits are being read, a clock is started along with a bit counter. At this time, a precise determination is made of the radial position at which the read bits are present. From these values, angular and/or linear velocities are computed and stored on the medium. Collected over time, this information is useful for determining aging characteristics of the drive mechanism for the medium. Also, even one-time collection of this speed information is useful for determining the speed at which data was written so that the drive speed can be accurately controlled for read operations, for example.

A modular countersink assembly, comprising a drill having an exterior tapered surface, a countersink body having an interior tapered surface for mating with the exterior tapered surface of the drill, and an insert removably secured to the countersink body enables an operator to replace either the drill and/or the insert if one or the other or both become worn. The insert is positioned both axially and radially and may have a PCD cutting edge.

A throwing wheel assembly including a wheel and a series of throwing blades mounted in radial channels in the wheel formed with mating dovetail wing portions on the slot sides and a projecting at the base of the blade. A sloping grove in the bottom of each channel engages a projecting ramp feature on the base of the mating blade received therein to cam the blade outwardly and thereby create a tight fit of the dovetail portions and to lock the blades in position.

A disk drive with patterned-media disks has information recorded in the servo sectors that identifies misplacement of the data islands in the data regions between the servo sectors. This misplacement information is read from the servo sectors prior to writing to correct either or both the radial position of the write head and the timing of the write pulses to the data islands. The misplacement information may include radial deviation of the data tracks, circumferential or along-the-track misplacement of the data islands, or the location of defective data islands.

An apparatus for processing harvested crops, in particular a threshing and/or separating apparatus, comprising a rotor which is mounted rotatably about its longitudinal axis, a separating device with a separating device region which at least partially surrounds a lower circumferential region of the rotor, the circumferential region being arranged below the longitudinal axis in an operationally ready state of the apparatus, and is arranged radially spaced apart from the rotor. A passage region for the harvested crop is formed between the separating device regions and the lower circumferential region of the rotor, wherein the separating device region extends along the longitudinal axis, and comprises at least one control element. The control element is movable into the passage region and/or into an axial projection of the passage, in order to control the flow of harvested crop.

The invention discloses a buckle type reinforcing steel bar connection grouting sleeve which is simple and reliable in field construction operation and does not need a sealing ring and a construction process. The grouting sleeve comprises a sleeve connecting part; a first sleeve assembly and a second sleeve assembly which are connected in an inserted mode are arranged in the sleeve connecting part in a sleeved mode; each sleeve assembly comprises a sleeve; the inner wall of each sleeve is sleeved with a steel bar connecting block in a clamped mode; and threaded holes are formed in the ends, away from each other, of the two steel bar connecting blocks. Two prefabricated elements needing to be connected in a structure can be prepared separately, so that the installation efficiency of the prefabricated elements is improved, connection is more convenient and faster through the connection mode of the sleeve, and the working performance of the grouting sleeve is guaranteed.

A hybrid induction welded piston including an upper piston part welded to a lower piston part is provided. The piston is produced by induction heating the upper piston part and the lower piston part, and bringing the parts together to a part growth compensated position. The method then includes rotating the upper piston part 17 to 34 degrees clockwise and then 17 to 34 degrees counterclockwise. In addition to controlling the axial position and degree of rotation, the force applied to the piston parts is controlled so that preferably no flash is formed in a narrow cooling chamber of the piston. During the rotating steps, the pressure gradually increases to a maximum level which occurs while the upper piston part is rotating in the second direction. The piston includes a homogenous metallurgical bond across the weld and no indentation on the outer surface at the weld prior to machining.

The invention provides an automatic clamp for external holding positioning and end face pressing for a thin-wall sleeve, and belongs to the field of machining. According to the automatic clamp, a clamp body is arranged on a transition flange, the left end of the clamp body is provided with a circular hole, and the right end of the clamp body is provided with a conical hole; an external holding elastic sleeve is concentrically arranged in the clamp body, the left end of the external holding elastic sleeve is matched with the circular hole of the clamp body, and the right end of the external holding elastic sleeve and the conical hole of the clamp body form a conical surface holding-tightly structure; a column body of a pressing rod is matched with an inner hole at the left end of the external holding elastic sleeve, a disc spring is arranged between the column body of the pressing rod and the inner hole at the left end of the external holding elastic sleeve, a rod body of the pressing rod extends out of the clamp body through a through rectangular groove in the external holding elastic sleeve and the clamp body, and the pressing rod is connected with a machine tool pull rod throughusing a screw; an end face pressing sleeve concentrically sleeves on the clamp body, and L-shaped through grooves on the pressing sleeve is buckled with the rod body of the pressing rod; an internal supporting ring, an external supporting ring and supporting rods form a frame to sleeve on the two sides of the external holding elastic sleeve and the pressing rod; and the thin-wall sleeve is placedin an inner hole of the right end of the external holding elastic sleeve, and is axially positioned by the external supporting ring, the external holding elastic sleeve holds the thin-wall sleeve by the pressing rod through the disc spring, the end face of the thin-wall sleeve is pressed by the end face pressing sleeve at the same time, and the problem of clamping deformation of the thin-wall sleeve is solved.

An idle air control valve assembly including a strain relief feature for a plurality of wire terminals that couple the control valve to a remote source. The strain relief feature prevents damage to solder joints attaching the wire leads to the valve assembly. Additional improvements in the idle air control valve assembly include a plurality of axially and radially extending protrusions on a peripheral surface of a valve body that assist in the alignment and retention of the valve body in a throttle body manifold of an internal combustion engine. The protrusions are operable in combination with a plurality of bolt flange tabs to ensure proper radial positioning of the valve body when inserted into the throttle body manifold.

The invention provides a positioning device of round table with eccentric hole making radial positioning of the round table accurate and ensuring quality of subsequent processing. It comprises a table panel and a round table with eccentric hole. It is characterized in that the table panel is tightly connected with a core rod clamping head, the clamping head end of the core rod clamping head is installed with core rod and is fastened by an adjusting bolt, the core rod is pointed to the round table, the table panel is opened with a positioning hole with diameter identical to that of the round table, the round table is provided into the positioning hole, diameter of the core rod is the same with that of the eccentric hole, and the core rod penetrates through the eccentric hole.

A flange sectioning connection type rotary connector consists of a shell, a moving ring, an end cover, a spring, a spring pad, a bearing bush, a sealing material and a semicircular sealing ring which are assembled together and is characterized in that the shell and the moving ring are both of an opposite-open sectioning structure, a positioning block is positioned by a positioning slot thereof, and a sectioning surface is fixedly connected into a whole by a bolt group. The end cover is fixed at the shaft end of the sectioning shell, the sectioning shell and the bearing bush are connected by a positioning annular slot and a positioning bugle, the shell and a rotary shaft fixing member are connected, and a static part is formed; the moving ring and a rotary shaft are fixedly connected to form a rotary part; the end cover, the spring and the spring pad form a pressing mechanism; the pressing mechanism tightly presses the moving ring on the semicircular sealing ring, such that the rotary connector is sealed for the first time, a rotary shaft hole of the moving ring, the rotary shaft and a rotary shaft hole of the shell are connected to form annular vacuum, a sealing material is filled, and the rotary connector is sealed for the second time. The flange sectioning connection type rotary connector is simple in structure, accurate in radial positioning, firm in sealing and simple and fast to detach, replace and mount.

The invention discloses a static pressure electric spindle headstock clamping device for ultra precision ball bearing ring grinding. The static pressure electric spindle headstock clamping device comprises a headstock machine base, a spindle, a front hydrostatic bearing, a rear hydrostatic bearing, a stator and a rotor, wherein the stator is fixed in the headstock machine base, the spindle is fixedly sleeved with the rotor, the headstock machine base is sleeved with the spindle, the front end of the spindle is supported through the front hydrostatic bearing, the rear end of the spindle is supported through the rear hydrostatic bearing, a rear bearing block is arranged between the rear hydrostatic bearing and the headstock machine base, a rear end cover is installed at the rear end of the rear hydrostatic bearing, an adjusting pad for adjusting thrust clearance is installed between the rear hydrostatic bearing and the rear end cover, the front end of the spindle extends out of the headstock machine base, a pole mounting base is installed at the front end of the spindle and provided with a pole plate for fixing an ultra precision ball bearing ring, and a support for positioning the ultra precision ball bearing ring in the radial direction is arranged on the periphery of the ultra precision ball bearing ring in front of the pole plate. The static pressure electric spindle headstock clamping device is high in rotation precision, small in end face runout, good in vibration reducing performance and high in processing precision.

The invention relates to a superconducting flywheel main shaft positioning device and a using method thereof. The positioning device comprises a vacuum sealing cavity, a radial positioning mechanism and a motor, wherein the vacuum sealing cavity is arranged above a superconducting flywheel host, the radial positioning mechanism is arranged in the vacuum sealing cavity, and the motor is positionedon one side of the vacuum sealing cavity. The radial positioning mechanism comprises a sliding rail, a left sliding block and a right sliding block which are located below the sliding rail and are insliding fit with the sliding rail, a screw rod which penetrates through the left sliding block and the right sliding block in sequence and is in threaded fit with the left sliding block and the rightsliding block, a left guide rod and a right guide rod which are arranged at the bottoms of the left sliding block and the right sliding block respectively, a left clamping block which is arranged on the left guide rod in a sleeved mode and is in clearance fit with the left guide rod, and a right clamping block which is arranged on the right guide rod in a sleeved mode and is in clearance fit withthe right guide rod. The output shaft of the motor is connected with one end of the screw rod. The left clamping block and the right clamping block are provided with clamping grooves respectively. According to the positioning device, the main shaft of the superconducting flywheel can be subjected to reliable, accurate and rapid radial positioning, and the radial displacement caused by axial movement when the flywheel main shaft is in a non-working state is effectively reduced.