30results about How to "Guaranteed control reliability" patented technology

The invention belongs to the technical field of steel rolling equipment, and discloses an online automatic roller scurrying method of a working roller of a planisher. The online automatic roller scurrying method comprises the following steps of lifting an upper supporting roller to an upper limit position; additionally arranging the upper supporting roller and an upper working roller in a balanced manner; moving the upper working rollers to a lifting position; driving a lower working roller and a lower supporting roller to rotate at a permanent speed; executing the scurrying operation of the upper working roller and the lower working roller; controlling the lower working roller and the lower supporting roller to stop rotating; and moving the upper working roller and the lower working roller to production preparation positions. Through the adoption of the roller scurrying method provided by the invention, the roller scurrying efficiency is improved, and influence on the stability and the accuracy of the planisher is reduced.

The invention belongs to the technical field of steel rolling equipment, and discloses an online automatic roller scurrying method of a working roller of a planisher. The online automatic roller scurrying method comprises the following steps of lifting an upper supporting roller to an upper limit position; additionally arranging the upper supporting roller and an upper working roller in a balanced manner; moving the upper working rollers to a lifting position; driving a lower working roller and a lower supporting roller to rotate at a permanent speed; executing the scurrying operation of the upper working roller and the lower working roller; controlling the lower working roller and the lower supporting roller to stop rotating; and moving the upper working roller and the lower working roller to production preparation positions. Through the adoption of the roller scurrying method provided by the invention, the roller scurrying efficiency is improved, and influence on the stability and the accuracy of the planisher is reduced.

The invention relates to a shifting device for a multi-speed transmission of an electric vehicle, which includes a shifting unit and a parking unit, the shifting unit controls shifting through the torque of the actuator, and the parking unit controls the shifting through the torque of the actuator Control the parking state. Specifically, the actuator includes a control motor that transmits drive torque to the first driven gear and the second driven gear through a drive gear that is externally meshed with the driven gear, and the shift unit includes: a shift fork that slidably mounted on the fork rail and actuating shifting; a profile roller connected to a first driven gear externally meshing with the drive gear and having a profile groove formed along the outer periphery of the profile roller; and a shift guide block, It is integrally formed with the shift fork and is coupled with the contoured groove.

The invention provides a method for controlling the size of aircraft surface defects that reduces the impact on flow transitions. First, the theoretical analysis method or ground test method is used to conduct flow transition research on the aircraft, and the surface defects that satisfy the boundary layer transition without being affected are obtained. Then carry out a joint simulation analysis of aerodynamic heating, structural temperature field and deformation field for the section where the defect occurs, and extract the thermal deformation data of each section where the defect occurs during the flight from the calculation results of the structural deformation; finally use the initial The defect scale counteracts the thermal deformation strategy, and the defect scale that should be initially processed is designed according to the constraint range and thermal deformation data, so as to ensure that the actual defect scale meets the constraint range during flight. The invention can reasonably and effectively control the surface defect scale of the aircraft, reduce the possibility of inducing premature transition of the surface, and ensure the reliable operation of the thermal protection system of the aircraft.

The invention provides a photoelectric feedback type carpentry milling head device with double swing angles. The photoelectric feedback type carpentry milling head device with the double swing angles comprises a supporting seat, a main shell, an electric spindle connecting plate, an electric spindle, a shaft C driving mechanism, a shaft A driving mechanism and two rotary photoelectric encoders, wherein the supporting seat is provided with the shaft C driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft C driving mechanism is connected with the main shell; the main shell is provided with the shaft A driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft A driving mechanism is connected with the electric spindle through the electric spindle connecting plate; the shaft C and shaft A driving mechanisms are provided with a travel switch respectively, a positioning block is arranged on a limit belt wheel which is connected to the output shafts of the driving mechanisms, and a corresponding limit switch is arranged on the supporting seat or the main shell; and grating discs in the rotary photoelectric encoders are arranged on the output shafts, and a photoelectric detector and a light source are arranged on the supporting seat or the main shell. The photoelectric feedbacktype carpentry milling head device with the double swing angles can realize polyhedron carving and milling processing during the processing of wood and artificial boards, and is suitable for carpentry high-accuracy and high-speed multi-axle numerically-controlled machine tool.

The invention provides a rotary speed control apparatus. A centrifuging assembly is arranged on a connecting assembly; a connecting rod assembly is connected with the centrifuging assembly; the connecting rod assembly is connected with a dynamic inductive magnetic coil of an electromagnetic induction assembly; the dynamic inductive magnetic coil and a fixed inductive magnetic coil of the electromagnetic induction assembly form an inductive magnetic coil; the fixed inductive magnetic coil is connected with a power supply; and the dynamic inductive magnetic coil is connected with a signal processor. The rotary speed control apparatus provided by the invention adopts mechanical structural design, so that speed detection and control reliability is ensured; centrifuging force of a centrifuging claw is utilized and the centrifuging force is amplified through the connecting rod assembly and is converted into electromagnetic induction; rotary speed detection and control is realized through the distance of the two magnetic inductive coils in electromagnetic induction; the centrifuging claw disclosed in the invention adopts a hollow structure, and a high-density sphere at the centrifuging end is adopted in an auxiliary manner, so that centrifuging force embodiment in high-speed change can be improved; and in addition, the rotary speed control apparatus is creative and reasonable in structure and particularly suitable for rotary speed detection and control in severe environments.

The invention discloses an automatic air supplement system and air supplement method for an oil pressure device of a hydropower station. A pressure and pressure difference transmitter is used for measuring and processing pressure and oil level parameters of a pressure oil tank, a traditional contact pressure meter or a mechanical pressure relay and a float annunciator which are adjusted difficultly and fatigued and damaged easily are replaced, and accordingly, pressure and oil level parameters of the pressure oil tank can be measured reliably and continuously. A programmable logic controller and peripheral apparatuses serve as a measuring and control center of the oil pressure device, the traditional relay logic control is changed into intelligent computer program control, and accordingly, control of various working conditions and processing and transmission of information of the oil pressure device can be completed automatically and reliably, and a real automatic air supplement function based on reliable measuring of pressure and oil levels of the pressure oil tank can be implemented.