9results about How to "Constant speed" patented technology

This utility model discloses a die-cutting device, including a mounting frame, a conveyor roller assembly, a tension roller, a first sensor, a second sensor, and a driver. The conveyor roller assembly includes multiple rotatable conveyor rollers mounted on the mounting frame. The tension roller and the multiple conveyor rollers together form a conveyor line for moving the material belt. The tension roller is slidably mounted on the mounting frame in the vertical direction and can tension the material belt downwards under its own weight. The first sensor is used to detect whether the tension roller is in a first position. The second sensor is used to detect whether the tension roller is in a second position, which is below the first position. The driver is drivenly connected to one of the conveyor rollers and can adjust the rotational speed of the conveyor roller when the first sensor detects that the tension roller is in the first position, or when the second sensor detects that the tension roller is in the second position, so that the tension roller is between the first and second positions. This application can improve the efficiency of roll changing for workers.

The application discloses a sludge treatment method and a treatment system, and belongs to the technical field of environmental protection. The system comprises a sludge pool, a sludge metering hopper, a sludge mixing machine, a sludge hopper and a dewatering device. The dewatering device comprises a filter pressing structure and two cloth stacking machines. The filter pressing structure can move forward and backward to be directly below the filter pressing structure. The cloth stacking machine can reciprocate forward and backward to stack the filter cloth in the filter pressing structure. One cloth stacking machine is used for feeding or discharging, and the other cloth stacking machine is used for filter pressing. The cloth stacking machine comprises a reciprocating driving mechanism, a rack and a conveying mechanism on the rack, an upper filter cloth operating mechanism, a feeding mechanism, a lower filter cloth operating mechanism and a mud pressing roller. The lower filter cloth operating mechanism comprises a lower cloth winding assembly, a lower deviation rectifying detection assembly, a first lower flattening assembly, a lower material scraping assembly, a second lower flattening assembly and a traction assembly. The upper filter cloth operating mechanism comprises an upper cloth winding assembly, an upper deviation rectifying detection assembly, an upper flattening assembly, an upper material scraping assembly and a cloth pressing roller.

The utility model discloses a speed simulation device for calibration of a speed test module, and relates to the technical field of photoelectric measurement. The rotary driving part is assembled at the top end of the mounting bracket; the rotation simulation part is assembled on an output shaft of the rotation driving part, the rotation driving part drives the rotation simulation part to rotate, and the instantaneous speed of train equipment monitored by pantograph dynamic monitoring equipment when the train equipment passes is simulated; the adjusting guide rail is assembled on the mounting bracket; and the measuring piece is assembled on the adjusting guide rail in a sliding manner and is used for measuring the number of times and interval time when the rotating simulation piece passes through in a rotating manner with different distance measuring radiuses. The rotation driving part drives the rotation simulation part to rotate, the instantaneous speed monitored by the pantograph dynamic monitoring equipment when train equipment passes is simulated, and compared with the speed change simulated by a horizontal movement mechanism, the motion range of the device is not limited, large impact cannot be generated, the target operation speed is constant, and the simulation calculation speed is more accurate.

The invention provides a snow pressing vehicle and a control method thereof, and relates to the technical field of snow pressing vehicles. The snow pressing vehicle comprises a main controller; the closed hydrostatic transmission loop group is integrally controlled by the main controller, oil is supplied to the loop group through a unified hydraulic pump station, and the loop group comprises a walking hydraulic loop which comprises a left walking pump, a right walking pump, a left walking motor and a right walking motor, and the left walking motor and the right walking motor are connected with the left walking pump and the right walking pump respectively and used for independently driving tracks on the two sides to achieve running and steering of the vehicle; the working device hydraulic circuit comprises a snow plough pump and a snow plough motor driven by the snow plough pump, and is used for driving a snow roller of a snow plough to perform snow beating operation; the auxiliary action hydraulic circuit comprises an action oil cylinder used for controlling multiple degrees of freedom of the snow shovel and a posture oil cylinder used for controlling the posture of the snow plough. By adopting the closed hydrostatic transmission loop group and the main controller for centralized control, the problem of coupling interference easily occurring when each hydraulic loop of the traditional snow pressing vehicle works independently is solved, and the snow pressing vehicle has stronger anti-interference capability and better controllability.

The application relates to a method for judging the low-temperature plasticizing capacity of polyethylene, which detects the peak temperature, lamella thickness, methylene sequence length and peak area of each fraction of a polyethylene sample by testing the resin chain structure branching degree and the performance of the aggregate structure through SSA, establishes the correlation with the plasticizing condition of the polyethylene, and realizes the rapid evaluation of the plasticizing condition of the polyethylene in the low-temperature extrusion.

This utility model relates to the field of polishing module technology and discloses a multifunctional electric polishing module, including a robotic arm fixing rod. A motor bracket is mounted on the robotic arm fixing rod, and a dual-head motor and a single-head motor are mounted on the motor bracket. A grinding eccentric shaft is mounted on the dual-head motor, and a square grinding head is mounted on the single-head motor. This utility model is applicable to various industrial fields, utilizing modular design to ensure functional versatility. It is particularly suitable for the field of robotic polishing, performing polishing of various products and achieving one-time polishing. By changing different sizes and types of grinding heads, seamless switching can be achieved, expanding the application range and improving production efficiency. The grinding head speed can be precisely controlled and kept constant according to the processing technology of different products, ensuring a constant grinding linear speed during polishing and improving product polishing yield. Furthermore, different grinding heads can be installed according to different process requirements, enabling rapid switching between product polishing processes.

The utility model discloses a two -stage double -cylinder hydraulic device. The hydraulic device includes: cylinder cover, cylinder base, upper hydraulic cylinder, lower hydraulic cylinder, first oil pipe, second oil pipe, rodless cavity oil pipe, rod cavity oil pipe and connecting rod, be provided with upper hydraulic cylinder, lower hydraulic cylinder, rodless cavity oil pipe, rod cavity oil pipe and connecting rod between cylinder cover and cylinder base, the upper hydraulic cylinder includes upper cylinder barrel and the upper piston rod telescopic in upper cylinder barrel, the upper piston rod passes through cylinder cover and can telescopic stretch out upward, the lower hydraulic cylinder includes lower cylinder barrel and the lower piston rod telescopic in lower cylinder barrel, the lower piston rod passes through cylinder base and can telescopic stretch out downward, first oil pipe is communicated with the rodless cavity of upper cylinder barrel and the rodless cavity of lower cylinder barrel through rodless cavity oil circuit and rodless cavity oil pipe, and second oil pipe is communicated with the rod cavity of upper cylinder barrel and the rod cavity of lower cylinder barrel through rod cavity oil circuit and rod cavity oil pipe. The device is more suitable for square column lifting of operating table.