7results about How to "Reduce vibration load" patented technology

The invention relates to the field of aero-engines, in particular to a fan stationary blade retaining structure of an open rotor engine. The fan stationary blade retaining structure is positioned between the fan blade handle and the stationary blade hub and comprises a magnetic suspension spherical joint; the magnetic suspension spherical joint comprises a spherical joint inner shell, a spherical joint outer shell, a limiting structure and an electromagnetic force adjusting device. The tail end of a blade handle of the fan stationary blade is fixedly connected with a spherical joint inner shell of the magnetic suspension spherical joint, and a spherical joint outer shell is installed in a corresponding installation cavity in the stationary blade hub and then fixed to the intermediate case. The limiting structure is arranged between the spherical joint inner shell and the spherical joint outer shell along the axis of the blade handle, and a local mechanical weak part is arranged on the limiting structure. The limiting structure between the spherical joint inner shell and the spherical joint outer shell can decouple the fan stationary blade and the intermediate case, impact and vibration loads transmitted to the intermediate case are reduced, and it is guaranteed that the intermediate case still has enough structural safety after being subjected to large impact loads.

The present application relates to the technical field of bed riprap leveling, and particularly relates to a floating type leveling ship for leveling layer riprap and a leveling process for covering sea area; the leveling ship is used to form a leveling layer by riprap on a bottom block stone layer; the height of a scraping head at the bottom of a riprap pipe is adjusted to be the height of the leveling layer, so that the height of the scraping head is the thickness of the leveling layer; the stone in the riprap pipe is maintained at a set height; a trolley on the leveling ship is started, and moves along a track at a set speed; the riprap pipe vibrates up and down in synchronization with the movement of the trolley; the stone in the riprap pipe falls from the scraping head onto the bottom block stone layer; the scraping head scrapes and vibrates the stone on the bottom block stone layer until the trolley moves to the other end of the track, and the first ship position is completed; the scraping head realizes synchronous construction of riprap and scraping, improves the operation efficiency, reduces the number of ships on site, and reduces the construction cost.

The application relates to a high-lubricity bearing journal surface structure and a method for obtaining the same, wherein the friction surface of the bearing journal is uniformly staggered with hardened areas of protrusions and relatively recessed journal base material softening areas, the hardness of the hardened areas is 15-25 HRC higher than that of the journal base material, and the protrusion height of the hardened areas is 5-30 mu m. The friction surface with the alternately soft and hard and staggered high and low areas is wear-resistant, improves bearing elasticity, reduces vibration load, can improve the oil capacity of the journal surface, increase the lubricating oil film thickness under low-speed and high-speed conditions, reduce the friction coefficient, improve the lubricating performance, and prolong the journal fatigue life. The journal structure is realized through an electrolytic plasma local heat treatment method, the manufacturing process can be automated, the process is energy-saving, environment-friendly and efficient, and the risk of overall deformation of large journal parts is eliminated.

The present invention discloses a main bearing seat of a wind turbine set for suppressing the transmission of wind rotor vibration, and relates to the technical field of bearing seats, comprising a slide rail, both ends of the slide rail are fixedly connected with a first limit block, the surface of the slide rail is slidably connected with the main bearing seat of the wind turbine set, the surface of the first limit block is fixedly connected with a buffer block, a first buffer cavity is provided inside the buffer block, a second buffer cavity is provided inside the first buffer cavity, and a first spring rod is fixedly connected to the inner wall of the first buffer cavity. According to the present invention, the main bearing seat of the wind turbine set can be moved, which is convenient for installation and disassembly, and vibration reduction measures are taken at the front and back respectively, which effectively reduces the influence of the wind rotor vibration on the nacelle and the tower, and at the same time, weakens the vibration load of the wind turbine, and during the vibration reduction process, the heat dissipation device can keep the temperature of the vibration reduction equipment within a safe range, effectively avoids the occurrence of thermal decay, ensures the buffering effect of the device, and improves the service life of the bearing seat.

The utility model relates to the field of gas ultrasonic flow meters, and discloses a gas ultrasonic flow meter which comprises a flow meter body, a connecting pipe is detachably arranged on the left side of the flow meter body, an assembling and disassembling assembly is arranged on the connecting pipe, a buffering assembly is arranged on the flow meter body, and the buffering assembly comprises a buffering plate. The back face of the buffer plate is elastically connected with the front face of the flowmeter body through a spring, a sleeve is fixedly connected to the right side of the top end of the front face of the flowmeter body, a cylindrical rod is elastically connected to the inner wall of the sleeve through a reset spring, a hinge rod is hinged to the left end of the cylindrical rod, and a damping sleeve is arranged on the inner wall of the sleeve. According to the flow meter, the buffering assembly is arranged, the vibration load is transmitted to the spring and the hinge rod through the buffering plate, the vibration load borne by the flow meter body is reduced through the spring, the reset spring and the damping sleeve, and therefore the measurement accuracy of the flow meter is improved.

The invention discloses a method for reducing train vibration hazards and monitoring potential diseases through a spring foundation. The method comprises the steps that S1, the limit value of vertical displacement during train running is determined; s2, the rigidity coefficient of the spring foundation is designed; s3, spring units, reinforced concrete floating slabs, sleepers and rails are sequentially installed on the tunnel base; s4, multiple groups of data acquisition modules are mounted below the reinforced concrete floating slab at intervals in the longitudinal direction of the tunnel; s5, train vibration frequency is collected through a data acquisition module, a database is established, vibration frequency distribution of different sections during train operation is analyzed, and damping of a spring foundation system is increased; and S6, establishing a machine learning platform based on simulation test data, establishing association between the vibration frequency and tunnel diseases, and monitoring potential tunnel diseases through actual monitoring data. A traditional rigid foundation is changed into the flexible foundation, vibration loads generated when a train runs are absorbed and reduced through the flexible foundation, and then damage to a tunnel structure is reduced.

The application discloses a friction type cable-stayed cable damper and a cable force monitoring method, and the damper comprises a friction pair connecting steel plate, first clamping plates and second clamping plates arranged on the upper and lower sides of the friction pair connecting steel plate, a friction pair arranged between the first clamping plates and the second clamping plates and a clamping plate connecting plate; the friction pair is fixed with the friction pair connecting steel plate or the clamping plate connecting plate; the contact areas of the first clamping plates and the second clamping plates with the friction pair are provided with different roughnesses from outside to inside; the two clamping plates are fixed through a second clamping bolt; a bolt force sensor is arranged between the second clamping bolt and a nut; a displacement sensor is arranged on the clamping plate connecting plate; bolt pretightening force data collected by the bolt force sensor in real time and cable force data collected by the displacement sensor in real time are transmitted to a client through a data collector, and real-time dynamic monitoring of a working state of the damper is realized; there is no risk of oil leakage, the life cycle cost is low, and installation and maintenance are simple and convenient.