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742 results about "Radial motion" patented technology

Method for detecting radial motion error of high speed principal axis by multi-ring coincidence three-point method

The invention discloses a method for detecting radial motion error of a high-speed principal axis by adopting a multi-circle superposition three-point method. Three laser displacement sensors are distributed around the high-speed principal axis which is provided with an angle encoder that has N lines and is connected with a scaling circuit; when the scaling circuit counts for Z times in an accumulating way and Z can not be divided exactly by N, the scaling circuit outputs sampled signals, and a trigger sensor implements sampling once; by repeating in this way, the principal axis is evenly distributed with n points for sampling by rotating the principal axis for a plurality of times to complete a sampling period; after every time of sampling, the sampling value is transmitted to an industrial computer through a USB interface and is then recorded; according to the requirements of detection accuracy, the sampling work having a plurality of sampling periods is carried out, the average sampling value of n points of every laser displacement sensor is calculated, and the deviation from circular form, the eccentric error and radial turning error of the principal axis which are obtained by separation are calculated. The method is not sensitive to the performance of the laser displacement sensor and is suitable for detecting radial motion error of the high-speed principal axis.
Owner:ZHEJIANG UNIV

Vacuum insulator surface charge three-dimensional measurement apparatus

The invention discloses a vacuum insulator surface charge three-dimensional measurement apparatus, belonging to the insulation measurement and charge measurement technical field under the vacuum environment. The measurement apparatus is composed of an insulator to be measured, a test electrode, a static probe, a probe support, a probe radial motion mechanism, a probe rotation control mechanism, a probe rotary motion control mechanism, a stepping motor and a probe motion control panel, wherein a high voltage electrode is fixed to the top panel of a vacuum test cavity, a ground electrode is fixed to the central section of a probe rotary table, the insulator to be measured is placed between a high voltage electrode and a ground electrode, and the probe rotary table is supported on the bottom panel of the vacuum test cavity. The invention provides the vacuum insulator surface charge three-dimensional measurement apparatus, which can realize insulator surface charge three-dimensional measurement in all radial directions and all angles through the radial control mechanism and the rotary control mechanism, meanwhile guarantee that a probe is far from the surface of the insulator to be measured in compression or not measuring charges, and possess higher charge resolution and spatial resolution.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Three-dimensional measuring device and method of charges on surface of basin-type insulator

The invention belongs to the technical field of high-voltage equipment and electrostatic measuring, and discloses a three-dimensional measuring device and method of charges on the surface of a basin-type insulator. The device comprises an arc surface and inclined surface measuring probe, a probe support guide rail, a probe radial motion control mechanism, a link mechanism, a 360-degree rotation control disk, a reading mechanism, a lifting control lead screw, a control mechanism, a sealed through-connection cavity, a main shaft for controlling motion, a coupler and an operation platform base. The whole set of mechanisms is in sealed connection with a GIS testing cavity. The three-dimensional measuring device can realize three-dimensional control over charge measuring on the surface of the actual basin-type insulator; air impermeability of a testing device is guaranteed, therefore, the purpose that all-direction and totally-radial three-dimensional measuring is conducted on the charges on the surface of the basin-type insulator in voltage equipment or high-air-pressure environment is realized, and high charge resolution and spatial resolution is achieved in measuring the surfaces of various basin-type insulators. Meanwhile, the three-dimensional measuring device and method can be used for environments with high requirements for air impermeability and the measuring process can be observed.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Special fixture for processing outer circle of long-cylinder part

ActiveCN103252515ANo radial movementEasy to adjustExpansion mandrelsSet screwRadial motion
The invention relates to a machining fixture, and discloses a special fixture for processing an outer circle of a long-cylinder part. Guide sleeves, taper sleeves and lock nuts are mounted at the two ends of a central spindle of the special fixture symmetrically and sequentially from inside to outside; the guide sleeves are in large-small end structures; the small ends of the guide sleeves are fixed with the central spindle by set screws; through holes are formed in casings at the large ends of the guide sleeves; ejection blocks are arranged in the through holes; cambered surfaces and grooves are arranged and formed at the outer ends of the ejection blocks; taper surfaces are arranged at the inner ends of the ejection blocks; cones of the taper sleeves eject the taper surfaces of the ejection blocks; and annular springs are mounted around the grooves of the ejection blocks. According to the special fixture, radial ejection block ejecting workpieces are added on the basis of axial clamping; radial motion during the processing of the outer circles of the workpieces is avoided; the centering precision is high; with the adoption of the matched design of the guide sleeves and the taper sleeves, and added shaft sleeves, centering clamping can be adjusted conveniently according to the length and an inner hole of the long-cylinder part; and the generality of the tool fixture for processing the outer circle of the long-cylinder part is improved.
Owner:XINYU IRON & STEEL CO LTD

Synchronous processing device with circular array curve surface structure

The invention discloses a synchronous processing device with a circular array curve surface structure. The synchronous processing device comprises main shaft processing units, radial motion units, a working table motion unit, dual-layer main shaft processing units and a gantry-type synchronous processing device with the circular array curve surface structure, wherein the main shaft processing units are mounted on the bases of the radial motion units, fixed through bolts, used for processing the curve surfaces of the blades of a workpiece impeller, and mounted in the circumferential direction; the central angle between every two main shaft processing units is an integral multiple of the included angle between the blades; the radial motion units are used for controlling the main shaft processing units on the radial motion units to move in the radial direction; the working table motion unit is mounted on the bases of the radial motion units and used for rotating and moving the blades up and down; the curve surfaces of the blades are processed through the three motions of the blades under the control of a digital control system; and the dual-layer main shaft processing units are mounted on the bases instead of the main shaft processing units and can be used for processing two layers of impellers at the same time, so that the processing efficiency of complex parts is improved.
Owner:北京宇同科技有限公司
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