12 results about "Stick-slip phenomenon" patented technology

The invention relates to the technical field of vibration reduction and isolation devices, in particular to bridge vibration reduction equipment and a bridge vibration reduction optimization method and system. The bridge vibration reduction equipment comprises a friction pendulum support used for being installed between a main beam and a bridge pier; the damper is used for being installed between the main beam and the bridge pier; the damper is configured in the mode that when the relative displacement speed between the main beam and the bridge pier is smaller than a preset threshold value, the damper is kept in a dormant state and does not provide damping force; and when the relative displacement speed between the main beam and the bridge pier is larger than a preset threshold value, the damper enters an activated state to generate damping force between the main beam and the bridge pier until the relative displacement speed between the main beam and the bridge pier is smaller than the preset threshold value. The damper is arranged between the main beam and the bridge pier, so that damping force is generated when the bridge and the bridge pier have sudden displacement change, the stick-slip phenomenon of the bridge friction pendulum support is prevented, frequent stick-slip acceleration of support abrasion is avoided, and the service life of the friction pendulum support is prolonged.

The disclosure provides a steering dust seal which seals a gap between a shaft hole of a column hole provided in a dashboard and a steering shaft. The steering dust seal includes an annular mounting portion attached to an inner peripheral surface of the shaft hole, an annular bumper facing the steering shaft in a non-contact state, a bellows connecting the mounting portion and the bumper, and a seal lip extending from the bumper to contact with the steering shaft. A lip included in the seal lip is covered over its entire circumference with a resin-made sliding portion having a friction coefficient preventing abnormal noise from occurring due to a stick-slip phenomenon between the rotating steering shaft and the sliding portion.

The invention relates to the technical field of linear motor modules, and discloses a roller transmission linear motor module which comprises a base, side covers are symmetrically and fixedly installed on the two sides of the base, a top cover corresponding to the base in parallel is fixedly installed on the tops of the side covers, a sliding assembly is arranged on the base in a sliding mode, and the sliding assembly is arranged on the base in a sliding mode. The sliding assembly comprises two pairs of rotatable bearing rollers, optical shafts are symmetrically and fixedly installed on the base, and the bearing rollers are in sliding fit with the optical shafts. A traditional sliding block inner groove structure is improved into the mode that the polished shaft is matched with the bearing roller, the machining difficulty of the sliding block body is greatly reduced, the polished shaft is a standard part, the cost is controllable, the overall manufacturing cost is reduced, the precise bearing roller is adopted, and an inner rolling body moves in a well-lubricated roller path, so that the machining precision is improved. The phenomena of crawling and stick-slip of a traditional ball guide rail during low-speed operation are effectively avoided, and the movement stability and the positioning precision are improved.

The invention provides a stepless hovering rotating shaft based on a rubber pad friction pair, and relates to the field of machinery. The stepless hovering rotating shaft based on the rubber pad friction pair comprises a front support, a rear support, a rubber pad, a bolt, a gasket, a disc spring and a nut, the front support, the rear support, the rubber pad, the bolt, the gasket, the disc spring and the nut are fastened through the nut, the bolt sequentially penetrates through the front support, the rubber pad and the rear support, the front support is installed in a first shell, and the rear support is installed in a second shell. According to the stepless hovering rotating shaft based on the rubber pad friction pair, through the design of the rubber pad friction pair, direct contact of metal is avoided, abrasion and stick-slip phenomena are reduced, and stable and smooth damping torque is provided; stepless hovering in the true sense is achieved, and the position can be stably kept at any angle. The structure is simple, cost is low, and production and maintenance are easy; the environment adaptability is good, and the vibration resistance and the impact resistance are excellent; the service life of the product can be prolonged by replacing the rubber pad, and maintenance cost is reduced.

The invention discloses a high-fidelity simulation method and platform for corrosion treatment operation in a pipeline, and belongs to the technical field of simulation and control. The system comprises a modeling and importing module used for constructing a three-dimensional model of a pipeline and a robot; the coordinate initialization module is used for establishing a unified axial and circumferential coordinate system; the physical engine module is used for simulating wheel rail constraint and stick-slip phenomena; the sensor simulation module simulates vision, an encoder and a laser distance measuring sensor and unifies timestamps; the rusty spot generating module is used for generating rusty spots on the inner wall of the pipeline; the online identification module is used for identifying rusty spots and generating an operation list; the control module is used for driving the robot to carry out accurate positioning and derusting operation; the data acquisition module is used for recording simulation data; and the man-machine interaction module provides a parameter configuration and operation monitoring interface. According to the invention, the problem that the prior art lacks comprehensive simulation verification capability is solved, and high-fidelity algorithm-in-loop simulation and optimization of the pipeline rust removal robot in a zero-risk and low-cost virtual environment are realized.

To provide a vehicle control apparatus capable of suppressing occurrence of a crank shock.SOLUTION: When a deceleration of a vehicle is equal to or greater than a predetermined deceleration and a torque is being transmitted from a power source to a propeller shaft, the torque transmitted from the power source to the propeller shaft is made to be equal to or less than a predetermined torque. Accordingly, surface pressure at a sliding portion is reduced, and the sliding portion is made less likely to maintain a state of being changed to expand and contract. That is, stick-slip is made less likely to occur at the sliding portion. Therefore, occurrence of a crank shock can be suppressed.SELECTED DRAWING: Figure 3

The utility model provides a kind of CVT dry clutch of high efficiency dithering reduction, it is related to clutch technical field, the flanging bushing additionally provided in the original clutch basis can significantly reduce the wear between counterweight assembly, first side washer and second side washer and counterweight pin respectively, make counterweight assembly spin smoothly when fling, promote the smooth engagement of the combination of friction material and clutch outer sleeve, avoid the occurrence of stick-slip phenomenon and unstable problem of torque transmission (friction coefficient is stable), to further reduce the possible of dithering generation;In addition, disc spring is additionally provided, when clutch combination rotates, counterweight assembly does rotational motion along counterweight pin under the action of centrifugal force, at this time, disc spring exerts axial thrust on counterweight assembly, generates friction force on counterweight assembly under the action of friction coefficient, the friction force generated by disc spring can prevent counterweight assembly from reversing at this time, reduce the probability of unstable torque transmission, so as to reduce the possible of dithering generation.

The present application belongs to the technical field of driving element stroke detection, and particularly relates to a stroke detection device of a piezoelectric driver, which comprises: a grating support, which is movably connected with the shell of the piezoelectric driver along a first direction; the grating support is movably connected with the mover of the piezoelectric driver through a flexible hinge, and the flexible hinge is configured to be capable of transmitting the movement of the mover along the first direction to the grating support; a grating strip, which is installed on the grating support, and the length direction of the grating strip is parallel to the first direction; and a reading head, which is fixedly arranged in the shell of the piezoelectric driver, and the reading head is oppositely arranged with the grating strip. By introducing the flexible hinge, on the one hand, the high precision and high reliability of the stroke detection system can be ensured; on the other hand, the sticking and stick-slip phenomenon between the mover and the guide rail caused by the complete rigid constraint of the mover can be avoided.

The utility model discloses an automobile air outlet abnormal sound prevention damping structure and automobile air outlet, the abnormal sound prevention damping structure comprises a toggle component, a damping piece and a blade, the toggle component is provided with a sliding channel arranged along the transverse direction, the blade is arranged in the sliding channel in a penetrating mode, a clamping groove is formed in the inner wall of the sliding channel, and the damping piece is clamped in the clamping groove. An abnormal sound prevention layer is arranged between the damping piece and the blade and is a structural layer made of Teflon; in the assembling state, one end of the damping piece abuts against the bottom of the clamping groove, and the other end of the damping piece is tightly attached to the outer side face of the blade through the abnormal sound preventing layer. The abnormal sound prevention layer is arranged between the damping piece and the blade, the abnormal sound prevention layer is a structural layer made of Teflon, and the abnormal sound prevention layer can form a very smooth surface, so that the abnormal sound prevention layer has high lubricity and non-adhesion performance, condensate water is difficult to adhere to the abnormal sound prevention layer, and the abnormal sound prevention layer is prevented from being damaged. The stick-slip phenomenon during relative movement of the damping piece and the blade is avoided, and the problem that abnormal noise is generated due to friction between the damping piece and the blade is solved.

The utility model relates to aluminium plate processing technical field, concretely is a kind of aluminium plate processing anti-jump calendering equipment, including rack, be provided with adjusting frame on the rack, be provided with calendering mechanism on the rack, auxiliary spraying subassembly is slidably connected on the rack, support frame is provided on the rack, and feeding roller is rotatably connected on the support frame;The bottom of rack is fixedly connected with base, the top of base is fixedly connected with first connecting frame, third sliding slot is set up in the top of first connecting frame, and first rack is fixedly connected on first connecting frame;The bottom of adjusting frame is set with fourth sliding slot.Achieve the effect in that: when using, avoid the insufficient lubrication to aluminium plate or uneven distribution of lubricant on aluminium plate, lead to the fluctuation of friction coefficient between calendering roller and aluminium plate, avoid the friction force between calendering roller and aluminium plate when rolling speed is higher, sudden increase, produce stick-slip phenomenon, lead to the periodic vibration of calendering roller, thereby avoid the emergence of roll jump situation, ensure the quality of rolled aluminium plate.

To accurately detect stick-slip phenomena. [Solution] The stick-slip detection device 100 is characterized by comprising: a measuring unit 131 that measures the displacement of a movable part having a contact sliding part; a identifying unit 132 that identifies a section in which the sign of the difference between the measured value of the movable part measured by the measuring unit 131 and the set value of the movable part does not change for a predetermined period of time; a calculation unit 133 that calculates an index value based on the measured value of the movable part and the set value of the movable part in the section identified by the identifying unit 132; and a detection unit 134 that detects an abnormality in the movable part when the index value calculated by the calculation unit 133 is greater than or equal to a predetermined threshold.

The invention belongs to the technical field of ceramic strength detection, and particularly relates to ceramic product strength detection equipment and a detection method.The ceramic product strength detection equipment comprises a detection table, a sliding table arranged on the detection table and a detection head driven by a hydraulic system, a positioning sliding block is arranged at one end of the detection head, and a sliding groove allowing the positioning sliding block to slide is formed in the detection head; a treatment table is fixedly mounted at the bottom end of the detection head, an oil storage cavity is formed in the treatment table, a rotating table is rotationally mounted in the oil storage cavity, one end of the rotating table downwards extends out of the treatment table, bristles are fixedly mounted on the outer wall of the rotating table, a collecting table is arranged at the bottom of the rotating table, a feeding port is formed in the top end of the collecting table, and the collecting table is fixedly connected with the detection head; by effectively removing lubricating grease and impurities which are solidified due to temperature change, the difference between static friction force and dynamic friction force is remarkably reduced, the problem that a detection head is rushed due to the stick-slip phenomenon is fundamentally solved, and the stability of the detection process is further guaranteed.