44results about How to "With automatic compensation function" patented technology

The invention belongs to a mechanical-electrical integration system, relating to electric transmission analogue of a mechanical rotation inertia system, in particular to a brake tester with combination of mechanical analogue and electric inertia analogue and a control algorithm. The control algorithm comprises the following steps of: calculating a total drop-out value when the kinetic energy of a flywheel is related to a test appointed initial rotation speed by synchronously acquiring a flywheel rotation speed and a motor output torque, calculating total energy compensated by the motor according to a mathematic model, simultaneously calculating total energy compensated by the motor to obtain the difference of the two and calculating a force moment output value of the motor in a next control period so that the tester runs in a state of being equal to an ideal flywheel without system constant resistance. The brake tester has an automatic compensation function of an energy compensation error so as to control the total error within a small range; and exact matching of rotation inertia is realized, the requirement of a high-precision test can be met by the control precision, and the investment and the operation cost are saved.

The invention belongs to a mechanical and electrical integrated system and relates to electric drive simulation of a mechanical rotation inertia system, measurement of braking torques of brakes except the tested brake and synchronous measurement of a combination braking torque and a mechanical friction braking torque under a simulated composite braking state, in particular to a ventilating disc type brake test stand and an electric inertia simulating control method of the ventilating disc type brake test stand. The method includes the steps of synchronously collecting the rotating speed of a flywheel and the output torque of a motor, calculating a torque output value of the motor according to a mathematic model so that the test stand runs under the situation where the simulator stand approaches an ideal flywheel and no system inherent resistance exists. According to the test stand and the method, accurate matching of the rotational inertia is achieved, control precision can meet high-precision test requirements, and investment and running cost are saved.

The invention discloses a plug-in connecting terminal for use in a universal circuit breaker, which comprises a connecting terminal frame body fixed on a breaker body, a terminal connecting block arranged in the frame body and a terminal main body connected with a driving device of the breaker, wherein the frame body is fixedly connected with the inside of the breaker body through a frame body connecting device arranged on the frame body; the terminal connecting block can move horizontally in the frame body along guide rails; the terminal main body moves reciprocally through the driving device connected with the terminal main body; and a locking and unlocking device is arranged in the connecting terminal. According to the technical scheme, the connecting terminal can well overcome the technical drawbacks of elastic fatigue susceptibility of a tension spring keeping the terminal connecting block and the terminal main body in close joint, the deformation and cracking susceptibility of a bearing column, the poor dynamic-static terminal contact generated under the action of a downward component force when the terminal main body is plugged in the terminal connecting block, the deformation produced in a dynamic connecting terminal under the action of a deflecting force in the connecting terminal in a connected state, and the like. And the plug-in connecting terminal has the advantages that: the structure is simple; the inter-part connection is reliable; the mechanical movement is smooth; the service life is long; and the problems of high cost and inconvenient operation, which are caused by the frequent replacement of the connecting terminal of the breaker, are solved.

This invention discloses method and equipment for preparing lead iodide single crystals from lead iodide melt, which comprises the steps of: cleaning an ampule, filling it with lead iodide powders, degassing and sealing the ampule, growing the single crystals and cooling. The method can effectively suppress the decomposition of lead iodide melt and the vaporization of iodine, and can remove segregated lead. The ampule is made of a quartz tube, and comprises a seed crystal bag, a growth chamber, a connecting vessel, a lead tube, a loading bag anb a hook. After filling, the ampule is placed into a two-stage temperature range vertical tubular furnace to finish the growth of the single crystals. The as-grown single crystals are orange and semi-transparent with sizes up to Phi (15-20)X30 mm. The electrical resistivity of as-grown single crystals can reach 1012-1013 ohm .cm, thus the single crystals have wide applications, especially as room temperature nuclear radiation detector.

The invention belongs to a mechanical and electrical integrated system and relates to electric drive simulation of a mechanical rotation inertia system, measurement of braking torques of brakes except the tested brake and synchronous measurement of a combination braking torque and a mechanical friction braking torque under a simulated composite braking state, in particular to a ventilating disc type brake electric inertia simulator stand and an electric inertia simulating control method of the ventilating disc type brake electric inertia simulator stand. The method includes the steps of synchronously collecting the rotating speed of a flywheel and the output torque of a motor, calculating total energy which needs to be compensated by the motor according to a mathematic model, calculating total energy which has been compensated by the motor at the same time, obtaining the difference between the two types of total energy, and calculating and setting a torque output value of the motor according to the difference so that the simulator stand runs under the situation where the simulator stand approaches an ideal flywheel and no system inherent resistance exists. The mechanical and electrical integrated system has an automatic compensation function for an energy compensation error, controls the total errors within a very small range, achieves accurate matching of rotation inertia and saves investment and running cost, wherein the control precision can meet high-precision test requirements.

The invention belongs to mechatronics systems, and relates to electric drive simulation of a mechanical rotation inertial system, in particular to an electric inertia tyre braking bench and an electric inertia control method thereof. Drum rotation speed and motor output torque are synchronously collected, a motor torque output value is calculated according to a mathematic model, and the braking bench operates under the state that an ideal drum is close and system proper drag does not exist. Precise matching of rotational inertia is achieved, control precision can meet the requirement of a high-precision test, and investment and operation cost are saved.

The invention belongs to a mechatronics system, and relates to electrified transmission simulation of a mechanical slew inertia system, in particular to a mechanical and electric inertia simulation tire braking bench and an electric inertia simulation control method. The angular velocity of a drum wheel and the output torque of a motor are acquired synchronously; the total energy which the motor should compensate is calculated according to a mathematic model, the total energy which the motor already compensates is calculated at the same time, and the difference between the total energy which the motor should compensate and the total energy which the motor already compensates is obtained; the torque output value of the motor is calculated according to the difference so that the machine and electric inertia simulation tire braking bench can operate in the state that the machine and electric inertia simulation tire braking bench approaches an ideal drum wheel and is free from drum wheel system proper drag. The mechanical and electric inertia simulation tire braking bench has the function of automatically compensating energy compensating errors, thereby controlling total errors within a small range; accurate match of rotational inertia is realized, and the control accuracy can meet the test requirement for high precision; investment is saved, and operating cost is reduced.

The invention discloses a screen frame positioner for screen photosensitive plate making and a rapid and accurate positioning method thereof. The screen frame positioner consists of a conical ejector pin positioning device, a trapezoid ejector pin positioning device, a screen frame equipped with a ladder rod polymer photosensitive film screen, and a fixation frame for positioning the screen frame. The rapid and accurate positioning method includes: a preparation alignment process under a lighting condition and a printing platemaking process under a darkroom condition. With the aid of the screen frame positioned, a complex three-parameter screen frame positioning problem is converted to a positioning problem of three single parameters. Rapid and accurate positioning replaces the time-consuming and laborious screen frame manual positioning that cannot ensure the positioning accuracy.

The invention provides a dedicated piston assembly for a reciprocating piston type gas compressor. The dedicated piston assembly for the reciprocating piston type gas compressor is good in sealing effect, long in service life, low in cost, capable of being used under the working conditions of oil lubrication and oil-free lubrication, and particularly suitable for the field of medium pressure and high pressure. The dedicated piston assembly for the reciprocating piston type gas compressor comprises an air cylinder and a piston matched with the air cylinder. An upper guide ring and a lower guide ring are installed at the two ends of the piston respectively. Multiple circular grooves are formed in the piston. Piston rings connected with the air cylinder in a sealing mode are arranged in the circular grooves. At least one seal ring is arranged on the inner side of each piston ring in each circular groove. At least one gas guide hole which makes the root portion of each circular groove be communicated with an inner cavity of the air cylinder is correspondingly formed in each circular groove in the piston. The gas guide holes are multiple in number and distributed along each circular groove at an equal distance. Each piston ring is of a spring structure, and the number of total coils of each spring is greater than one.

The invention provides an automatic limiting regulator for a steering wheel. A front rod of an inner stroke unloading valve rod of a rack piston is arranged in a limiting spring sleeve and is in clearance fit with the limiting spring sleeve; a rear rod of the stroke unloading valve rod is arranged in a pressure spring; a fixing nut and the limiting spring sleeve form interference fit by the elastic force action applied to the limiting spring sleeve; the fixing nut and the rack piston are connected by threads; the stroke unloading valve rod and the limiting spring sleeve form conical sealing under the action of the pressure spring under the normal state; separated oil paths A and B of a left cavity and a right cavity on the limiting spring sleeve in the rack piston are closed under the normal state. The defect of the inaccurate positioning precision in the process that the steering wheel adjusts the corner unloading position is solved, conical surface rigid sealing is adopted, the sealing performance is good and the automatic limiting regulator has an automatic compensation function.