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292 results about "Balance test" patented technology

Balance weighing structure and balance weighing method for horizontal rotating construction of box girder bridge

The invention relates to the technical field of bridge construction, in particular to a balance weighing structure and a balance weighing method for horizontal rotating construction of a box girder bridge. A rotation plate is arranged on the top of a pier and in the center of the bottom of a girder, each truss is arranged below the girder along the length direction of the girder, one end of each truss is fixed onto the top of the pier, and the other end of each truss is erected on the ground through a vertical column; each group of auxiliary weighing systems is positioned between the end, in the length direction, of the girder and the truss at the same end. The method includes: arranging a lower support and an upper support on two sides of the pier, and casting the girder in situ on the rotation plate and the two groups of upper supports; demounting part of the upper supports, and arranging the auxiliary weighing systems between the end of the girder and the lower supports at the same end; performing balance test, and balancing to enable a center of gravity of the girder to be coincided with the center of the rotation plate; rotating the rotation plate to complete construction. The balance weighing structure and the balance weighing method for horizontal rotating construction of the box girder bridge have the advantages that a T structure is adjusted to a balanced state, directly jacking on the rotation plate is avoided, and the bridge is protected from damages owing to low jacking force.
Owner:CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD +1

Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping

The invention discloses a composite resurfacing welding method for a sink roller and a stabilizing roller used for hot dipping. Substrates of the sink roller and the stabilizing roller are made of a stainless steel iron-based material, and the substrates are provided with cobalt-base alloy working surfaces in a resurfacing welding mode. The method comprises the following steps: preheating the manufactured substrate of the sink roller or the stabilizing roller to 500 to 650 DEG C, and keeping the temperature for 1 to 3 hours; slowly cooling the temperature of the substrate to 250 to 350 DEG C at a speed of 50 to 150 DEG per hour, and forming a cobalt-base alloy material on the substrate in a resurfacing welding mode; performing heat treatment on the substrate to eliminate the stress; and finally performing rough machining, finish machining, balancing test and detection on the sink roller or the stabilizing roller. The sink roller and the stabilizing roller work under the conditions of hot-dip aluminium, aluminium-zinc, zinc-aluminium, zinc, pure aluminium liquid and the like, and have enough performances of resistance to heat, corrosion and wear; the substrates of the sink roller and the stabilizing roller and the working surfaces have high bonding strength; and the service life of the sink roller and the stabilizing roller is improved greatly, and is 2 to 3 times that of the prior product.
Owner:PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2

Multifunctional balance evaluating and training system

The invention discloses a multifunctional balance evaluating and training system which is applied in the field of human body balance capacity training and evaluating, comprises three functional modules namely a data acquisition module, a data processing module and a balance training module and structurally comprises an earth's surface pressure center testing table, an attitude sensor, an armrest frame, a data processing component, an external information displaying component and a pair of VR glasses, wherein the armrest frame is used for preventing a subject from falling down and other accidents and protecting personal safety; the earth's surface pressure center testing table and the attitude sensor acquire the balance data of a human body and transmit the data to the data processing component through wi-fi communication; and based on the human body balance analysis algorithm, the evaluation result and parameters of the human body balance capacity are displayed on the external information displaying component and the pair of VR glasses.The multifunctional balance evaluating and training system comprises three types of working modes namely evaluation, self training and auxiliary training, provides virtual game scenes for the balance test and training of the subject, improves the interestingness of the balance capacity evaluating and training process and is simple in structure, simple and convenient to operate and convenient for popularization.
Owner:ZHENGZHOU UNIV

Flexible DC transmission voltage source converter valve operation test device

The invention discloses a flexible DC transmission voltage source converter valve operation test device. The particular technical scheme is as follows: a test power supply is used for charging two sample valve assemblies and an assistant valve group, and a constant DC voltage control strategy is used for enabling voltage of each valve submodule to be distributed uniformly and required test voltage is achieved; a nearest level modulation strategy is adopted to generate test voltage at two ends of the two sample valves, and the two sample valves have the same DC voltage components and AC voltage components with the same amplitudes and different phases; under effects of the test voltage, the two sample valves form a closed-loop power circuit via a test reactor, the test reactor and a sample valve submodule capacitor perform electromagnetic energy exchange in the power closed-loop circuit to obtain test current, and the current contains a power frequency fundamental wave current component, a DC current component and a doubled power frequency loop current component; and the test power supply is used for energy complementation on operation loss of the test circuit, and the assistant valves are used for balancing test voltage fluctuation caused by the power grid.
Owner:XIAN HIGH VOLTAGE APP RES INST CO LTD

Adsorption and desorption/exploitation simulated experimental device and method of shale gas

The invention relates to an adsorption and desorption / exploitation simulated experimental device and method of shale gas. The device comprises a reference cylinder, a sample cylinder, a constant-temperature box, a piston type middle container, a valve, a high-precision plunger pump, a data acquisition system, a valve, a pressure sensor and a pressure sensor. A constant-pressure exploitation method comprises the following steps: carrying out experiment pre-treatment; setting the high-precision plunger pump into a constant pressure mode, setting pump pressure as an experimental pressure value, and acquiring data of the high-precision plunger pump in real time during withdrawal of the pump; recording the pressure P' when a pressure value of the sample cylinder reaches the experimental pressure value set in the pump and both of the pressure values are balanced; carrying out a plurality of pressure point balancing tests. A constant-yield exploitation method comprises the following steps: carrying out experiment pre-treatment; setting the high-precision plunger pump into a constant current mode, setting gas-production experiment flow velocity in the pump, and acquiring the pressure P' of the sample cylinder and the data of the pump in real time; stopping the operation of the pump when the pressure of the sample cylinder is reduced to an experimental setting value; carrying out a plurality of gas-production flow velocity simulated tests. According to the device and the method, the reliability of the result of the exploitation simulated test is ensured.
Owner:CHINA PETROLEUM & CHEM CORP +1

Static balance test method applied to gyroscope position marker spindle

The invention discloses a static balance test method applied to a gyroscope position marker spindle. A horizontal axis angular position rotary table is used for mounting and clamping a gyroscope position marker to be tested, any one axis to be tested of the gyroscope position marker is parallel to the horizontal axis of the rotary table by adjusting direction of a mounting fixture, a measurement and control system drives the tested axis to complete sine small angle vibration at each locking angular position of the rotary table, value of a static unbalance can be solved by virtue of integration on measured quantities in a driving current period of the tested axis, and position of the static unbalance can be obtained by observing the driving current and an angular position signal and combining a corner of the horizontal rotary table. The concrete test process comprises the following steps of: step one, measuring torque constant of the tested axis; step two, carrying out static balance test on the gyroscope position marker spindle; and step three, selecting the rest test axes of the gyroscope position marker and carrying out test, after the tested axis is determined, repeating the step one and the step two, and finally completing test on three tested axes, namely an outer annular axis, a middle annular axis and an inner annular axis, thus the test method disclosed by the invention is finished.
Owner:BEIHANG UNIV

Comprehensive test platform

The invention relates to a comprehensive test platform for running attrition test of box components and for static balance test of wheel and shaft parts. The comprehensive test platform comprises a platform with an upper reference plane, a static balance test device, a running attrition test device, an oil adding and pumping device and T-shaped grooves provided arranged on the platform at intervals. The static balance test device is composed of two core shaft supports, core shafts, a pair of rollers connected with each core shaft support, wherein the core shafts are arranged on two pairs of rollers on both ends. The running attrition test device includes a power device, a transmission mechanism and two press plates, wherein, the power device is connected with the transmission mechanism, and the transmission mechanism is connected with an input shaft of a box body to be tested. The oil adding and pumping device comprises an oil tank, a motor and a gear pump, wherein, the suction inlet of the gear pump is connected with the pipe line of the oil tank; the exit hole of the gear pump is connected with a hose joint and an oil nozzle. All fixed elements on the platform are connected with the platform through T-shaped screws. The invention has the advantages of accurate testing, good generality, good practicality, simple structure, convenient fabrication and low cost.
Owner:RG PETRO MACHINERY GROUP
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