5results about How to "Avoid mechanical shock" patented technology

The utility model discloses a hydraulic dismounting tool of elastic cylindrical pin of cable gripper, relates to cable gripper dismounting technical field, including support frame, cable gripper and spring pin, the top fixed mounting of support frame one side is equipped with hydraulic cylinder, the output of hydraulic cylinder is equipped with piston rod, the inside of piston rod is equipped with dismounting assembly and installation component, the bottom fixed mounting of support frame one side is equipped with bottom mounting seat, the top rotation of bottom mounting seat is connected with rotary support seat, rotary support seat is cooperated with cable gripper, one side of hydraulic cylinder is equipped with manual hydraulic pump, the utility model has the beneficial effect that: through adopting special fixture and hydraulic stem drive different awl of cone head to complete dismounting and installing spring pin, adopt hydraulic mode and save the strength, avoid the mechanical impact that produces to the equipment hammering, and the installation quality is stable and reliable, and effectively improve work efficiency.

This application belongs to the field of rail transit technology, and particularly relates to a train over-phase control method and system. It includes: real-time monitoring of over-phase signals and acquisition of train speed signals; determining whether the medium-voltage support of the train traction system inverter is available; when an over-phase signal is detected, the medium-voltage support of the train traction system inverter is available, and the train speed exceeds a first speed threshold, generating a state transition signal; controlling the train traction system inverter to switch to regenerative braking mode based on the state transition signal, and controlling the train traction system rectifier to stop working after the state transition signal continues for a first time threshold; when the train main circuit breaker is detected to be closed, controlling the train traction system rectifier to restart; and controlling the train traction system inverter to exit regenerative braking mode after the train traction system rectifier has stably operated in PWM rectification mode. This application achieves seamless medium-voltage transition by first supporting and then blocking the inverter.

The utility model discloses a kind of electric push rod load life testing devices, comprising: rack;Fixed seat is located in the lower part of the rack, for fixing the electric push rod to be measured;At least two horizontal parallel arrangements of sliding load, sequentially arranged in the vertical direction above the electric push rod to be measured;The lowermost sliding load is connected with the output end of the electric push rod to be measured;Guiding mechanism, vertically arranged on the rack, for guiding the sliding load along vertical direction sliding;Barrier, located on the rack or guiding mechanism, for abutting below each layer of sliding load to maintain the spacing between layers;Wherein, the electric push rod to be measured pushes the lowermost sliding load to move up and sequentially triggers the sliding load linkage of adjacent upper layer, forms load stepwise increasing.The utility model has the advantages that: the stepwise increasing of load is realized, the dynamic scene of load layer-by-layer superposition in actual working condition can be simulated, and test result is closer to real application.

This invention discloses a multi-signal fusion screw oil press anti-jamming and constant current control method and system, belonging to the field of agricultural machinery automation. Addressing the problems of low control accuracy, high fault misjudgment, and the need for manual intervention in existing technologies, the method includes: acquiring and preprocessing motor current, torque, and speed signals; comparing the actual current with the target value through adaptive PID control to adjust the speed and achieve constant current (constant pressure) control; fusion of four parameters (current exceeding threshold + rate of change exceeding threshold + torque exceeding threshold + speed below threshold) to determine jamming; in case of jamming, controlling the motor to reverse material retraction, pausing, and then smoothly restarting. The system includes signal detection, core control, execution drive, and human-machine interaction modules. This invention increases oil yield by 3%-8%, reduces the fault judgment rate to below 5%, reduces downtime to the second level, extends equipment life, and saves energy, and is applicable to various types of screw oil presses.

This invention belongs to the field of hydraulic transmission and automatic control technology, and discloses a stepless speed regulation control system and method for a hydraulic motor based on eccentricity back-calculation. By acquiring the angle signals of two swing cylinders and combining them with the preset geometric positional relationship between the center of the swing cylinder base and the center of the output shaft, the position of the eccentric center and the actual eccentricity are calculated. The target eccentricity is determined according to the target speed, and the error between the target eccentricity and the actual eccentricity is used as the control input. The controller performs PID calculations to obtain the servo valve control quantity, which drives the variable actuator to continuously adjust the position of the eccentric mechanism, thereby realizing continuous change of hydraulic motor displacement and continuous stepless speed regulation. The control process can also incorporate zero-position correction, direction consistency correction, differential filtering, anti-integral saturation, dead-zone compensation, and output limiting to improve speed regulation smoothness and control accuracy. This invention solves the problems of difficulty in measuring the state of the internal eccentric mechanism of a hydraulic motor and the difficulty in continuous speed regulation over a wide speed range.