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1417results about How to "good stability" patented technology

High-speed rotation testing machine and method for testing high-speed rotation strength performance of rotor

InactiveCN103604587ALarge single bearing capacitygood stability
The invention discloses a high-speed rotation testing machine and a method for testing the high-speed rotation strength performance of a rotor. The high-speed rotation testing machine comprises a test cavity, a rotor system which is accommodated in the test cavity and used for testing the test rotor, a driving system that drives the rotor system and a rotating speed control system that controls the rotating speed of the rotor system, wherein the driving system includes a driving motor and a speeder which is connected with the driving motor and drives the rotor system to rotate at a high speed, the rotor system includes a test rotor fixed part, a main shaft connected with the test rotor fixed part and driven to rotate by the speeder, and a damper which is sleeved outside the main shaft and supports the main shaft, the test cavity is equipped with a vacuumizing opening, a plurality of layers of containing rings is arranged in the test cavity and surround the rotor system, and the containing rings are connected through spacing blocks arranged at tail ends of the containing rings. The high-speed rotation testing machine uses a high-speed rotating rotor as a test object, the rotor is speeded up through the speeder system, the working condition of the rotor in high-speed rotation is simulated, and the performance requirement of high speed centrifugal load effect resistance of the rotor is tested.
Owner:HANGZHOU HAILUOMA SCI & TECH

Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process

The invention provides a method for performing induced synthesis on a stable MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into the surface of a macroporous carrier by virtue of a simple swabbing process, belonging to the field of new materials, and relating to a method for preparing the corresponding stable MOFs membrane by swabbing homologous metal oxide powder, introducing a growth crystal seed and a fixed connecting point for synthesizing the MOFs membrane on the surface of the macroporous carrier, and then performing induced growth. The method is characterized by comprising the following steps: introducing the homologous metal oxide powder into the surface of a macroporous plate-type or tubular carrier in advance by using the simple swabbing process, and then performing solvothermal growth to prepare continuous and dense MOFs membranes. The method provided by the invention has the effects and advantages that a universal method for preparing the MOFs membrane by using the macroporous carrier is provided, and the method is simple to operate in a preparation process, is high in repeatability and good in membrane stability, is suitable for amplified large-scale application, and has important industrial application values.
Owner:DALIAN UNIV OF TECH

Overburden bed separation sectional isolation grouting-and-bashing coal seam mining complete stoping method

The invention belongs to the field of coal mining, and particularly relates to an overburden bed separation sectional isolation grouting-and-bashing coal seam mining complete stoping method. The overburden bed separation sectional isolation grouting-and-bashing coal seam mining complete stoping method comprises the following steps that 1, according to geological prospecting data, an overburden keystrata of a stope is determined; 2, the inclination length of a stope face is designed reasonably according to the actual coal seam occurrence range and the reserve volume of a mine, and it is ensured that breaking of the overburden main key strata cannot be caused due to the fact that mining is conducted under the length; 3, a coal pillar with the length of a working face is arranged between twosections in a spaced mode, namely one section is spaced, sectional jump mining is conducted, and the sections on the two sides of the coal pillar are mined firstly; 4, pushing mining is conducted onthe working faces of the two sections, meanwhile, parallel working is conducted, the coal pillar is not reserved, a preset bashing belt is built in a crossheading, close to one side of the coal pillar, of the working face of the coal pillar along the coal wall; and 5, stoping work of the middle section is conducted. According to the overburden bed separation sectional isolation grouting-and-bashing coal seam mining complete stoping method, roadway driving maintenance and the working face working environment are safer and healthier.
Owner:TAIYUAN UNIV OF TECH

Steel sheet pile cofferdam structure construction method

The invention discloses a steel sheet pile cofferdam structure construction method which comprises the steps that (1) an inner side locating steel pipe pile and an outer side locating steel pipe pile are arranged on the inner side and the outer side of a steel sheet pile in a ramming mode, and an upper layer plane locating structure is fixedly arranged on the inner wall of the upper portion of the outer side locating steel pipe pile; (2) a cantilever beam which is connected with a lower layer precast concrete supporting whole system through a hanging rod is arranged on the top of a steel protecting cylinder; (3) an upper layer enclosing purlin is arranged on the inner side locating steel pipe pile, a steel sheet pile is inserted between the upper layer enclosing purlin and the upper layer plane locating structure in a ramming mode, the steel sheet pile is welded with the upper layer enclosing purlin in an inserting mode, and then an upper layer steel inner support is fixedly arranged in the upper layer enclosing purlin; (4) water in the steel sheet pile cofferdam is extracted out, a bracket is welded to support a lower layer precast concrete inner support, then the steel sheet pile and the lower layer enclosing purlin are welded, finally the hanging rod is removed, and the cantilever beam is detached; and (5) bearing platform concrete construction is carried out. The vertical accuracy of the steel sheet plate can be effectively controlled with the method.
Owner:CHINA CONSTR SIXTH ENG DIV CORP +1
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