41results about How to "Less prone to fatigue damage" patented technology

The invention provides a novel intelligent vibration isolation noise reduction composite structure system and a usage method thereof. The system comprises: a feedback piezoelectricity sensing element, an upper insulation transition layer, an upper flexible electrode, an actuator unit, a lower flexible electrode, a lower insulation transition layer and a piezoelectric sensing element. The feedback piezoelectricity sensing element, the actuator unit and the piezoelectric sensing element are connected with a controller through a line. When one sensor perceives external vibration, the controller adds a control voltage to the electrode coated on electroactive polymer surface according to different controlled objects and a control algorithm so that the actuator performs inverse deformation to control vibration transmission. And the other feedback piezoelectricity sensing element is taken as a feedback element which plays a supervision role. A small block which uses the structure is made to firmly stick on a submarine surface. Because of the inverse deformation, the control actuator can control sound radiation of a submarine. By using the system and the method of the invention, vibration isolation and noise abatement in high, middle and low frequency system can be completed. The system and the method can be widely used in the submarine, aerospace, precise instrument equipment vibration isolation field.

A multi-channel magnetic stirrer for laboratory use is characterized in that a motor drives a plurality of magnetic disks which are provided with driven wheels of the same diameter to rotate, and that the transmission angle between a transmission belt and the contact position with a drive wheel is 90 degrees to 120 degrees, and the motor is a low voltage AC motor. The stirrer is used for measuring the BOD5 value in water by differential pressure method in laboratory. The stirring conditions of the magnetic disks are the same, thus increasing the measuring accuracy and reducing the error. As the flex harass amplitude of the transmission belt is small, the service life can be prolonged, and safety and reliability can be ensured even working in the incubator with condensed water.

The invention discloses an overload valve, which comprises a valve body, a valve seat, a valve core and a spring, wherein an oil inlet cavity, an oil return cavity and a valve seat hole are arranged on the valve body; the valve seat is movably sleeved inside the valve seat hole and has a first moving stroke; the valve seat comprises an oil inlet hole communicated with the oil inlet cavity and the oil return cavity; and the spring props against the valve core and can drive the valve core to prop against the valve seat so as to block the oil inlet hole; the valve core has a second moving stroke, and the length of the second moving stroke is greater than that of the first moving stroke. Compared with the prior art, the overload valve is simple in structure, small in spring compression and not easy to generate fatigue damage; the impact of the valve core on the valve seat is relatively small when the overload valve is closed; abrasion of the valve core and the valve seat are greatly reduced, and the reliability and the service life of the overload valve can be greatly improved.

The invention discloses an overflow valve comprising a valve body, a main valve seat, a main valve core, a pilot valve seat, a pilot valve core, a main valve spring, a pilot valve spring, a pilot valve seat installation hole and a pilot valve seat limit part, wherein the main valve seat is fixedly sleeved in the valve body, and the pilot valve seat is movably sleeved in the pilot valve seat installation hole and is provided with a pilot valve oil inlet; and the pilot valve seat limit part is used for limiting the motion range of the pilot valve seat, so that the motion stroke of the pilot valve seat is shorter than that of the pilot valve core. Compared with the prior art, with the adoption of the overflow valve, abrasion of the pilot valve core and the pilot valve seat is small, and the pre-pressure of the pilot valve spring is small, so that the using reliability of the overflow valve can be greatly improved, and the service life of the overflow valve can be greatly prolonged.

The invention discloses a pressure gage, comprising a gauge plate (1), a gauge needle (5), a ventilation chassis joint (4) and a screw type spring tube (3), wherein the first end (31) of the screw type spring tube is fixed at the ventilation opening of the ventilation chassis joint (4), and the second end (32) penetrates the gauge plate (1) to be connected with the gauge needle (5). In the embodiment of the invention, the screw type spring tube is adopted for the elastic element of the pressure gauge, which virtually aims to disperse pressure displacement to a plurality of circles of helical surfaces. Compared with a traditional Bourden tube, the screw type spring tube can bear higher pressure under same displacement, thereby the bearing strength of the elastic element in the pressure gauge is improved. In addition, the gauge needle in the pressure gauge is a free end so that the pressure gauge can counteract impact generated by vibration through the swing of the gauge needle and avoid generating resonance with a vibration source, and the vibration resisting performance of the pressure gauge is improved.

The invention relates to the technical field of high-precision reducers, and discloses an improved structure of a flexible wheel of a harmonic reducer. The improved structure comprises a rigid wheel and a wave generator; an output disk is movably sleeved with one end of an inner cavity of the rigid wheel; and eight separating strips are arranged on the front side of the output disk, are distributed on the front side of the output disk in a ring array manner and are in sector shapes. According to the improved structure, the traditional flexible wheel is improved to comprise the output disk, theseparating strips and flexible mechanisms, through cooperation with the restoring tension force effect of reset tension springs, the flexible mechanisms are pushed out of the output disk sequentiallyby the aid of the long-axis part of the wave generator, and teeth outside rigid arc plates mesh with inner teeth of the rigid wheel, so that the speed reduction effect equivalent that of flexible wheels in the prior art is realized; compared with the prior art, the improved structure has the advantages that repeated deformation of the flexible wheel is changed into reciprocating sliding of the flexible mechanisms, deformation of the flexible wheel is changed into deformation of the reset tension springs, thus the problem that the flexible wheel is prone to damage due to repeated deformation is avoided, and meanwhile, the reset tension springs are not prone to fatigue damage and are cheap to replace.

The invention discloses a synthetic jet driver based on dielectric elastomer driving. The driver includes a front cavity, an elastic component, a dielectric elastomer film, an intermedium ring and a rear cavity. The front cavity and the rear cavity are hollow shells with one end open and the other end closed, and the intermedium ring is a hollow shell with the two ends open; the closed end of therear cavity is provided with a through hole, the open end of the rear cavity is closely connected with the first open end of the intermedium ring, and the second open end of the intermedium ring is connected with the open end of the front cavity. The second open end of the intermedium ring is provided with a dielectric elastomer film, a first inner cavity is formed between dielectric elastomer film and the front cavity, and a second cavity is formed between the dielectric elastomer film, the intermedium ring and the rear cavity; the elastic component is arranged between the front cavity and the dielectric elastomer film. The synthetic jet driver has very simple overall structure and motion control, very high jet speed and ultra low weight, and has great potential application value in the fields of fluid active control, aerospace exploration engineering and the like.

The invention relates to an exhaust suspension device for a passenger car. The exhaust suspension device comprises a single-supporting-point hoop, a double-supporting-point hoop, a first suspension bracket, a second suspension bracket and a third suspension bracket, wherein the single-supporting-point hoop comprises a first hoop and a first bracket arranged at the bottom of the first hoop; a first rubber pad is arranged between the first bracket and the first suspension bracket; a first heat insulating plate for insulating heat of the rubber pad is arranged on the first bracket; the double-supporting-point hoop comprises a second hoop, and a second bracket and a third bracket which are symmetrically arranged on both sides of the bottom of the second hoop; a second rubber pad is arranged between the second bracket and the second suspension bracket; a third rubber pad is arranged between the third bracket and the third suspension bracket; second heat insulating plates for insulating heat of the rubber pads are arranged above the second suspension bracket and the third suspension bracket. The exhaust suspension device has the characteristics of high structural strength, high durability, prevention of fatigue damage, and the like.

The invention discloses a multi-mining-type high-saturability steel wire-chinlon composite body OTR radial tire. The multi-mining-type high-saturability steel wire-chinlon composite body OTR radial tire comprises a crown, a tire shoulder, a belted layer, tire body cord fabric, sidewall rubber and a tire bead. Shoulder pad compound is arranged at the joint part of the belted layer and the tire shoulder. Rubber cores and steel wire rings are arranged on the tire bead part. The belted layer comprises a steel wire cord fabric layer I, an insulating rubber plate and a steel wire cord fabric layer II. The insulating rubber plate is located between the steel wire cord fabric layer I and the steel wire cord fabric layer II. The rubber cores are formed by splicing upper triangular rubber core bodies and lower triangular rubber core bodies. The abrasion resistance of the OTR radial tire is about 20% higher than that of bias OTR tires, the oil saving performance of the OTR radial tire is about 13% higher than that of the bias OTR tires, the comprehensive service life of the OTR radial tire is about 50% longer than that of the bias OTR tires, and the OTR radial tire has high cost performance.

The invention relates to an anti-fatigue manipulator reclaiming detection device. The device comprises a mounting plate, an induction switch, a swing shaft, a swing piece, a fixed rod, an elastic piece and a positioning rod, wherein the induction switch, the swing shaft, the fixed rod and the positioning rod are all arranged on the mounting plate, the fixed rod and the positioning rod are both located below the swing shaft, one end of the swing piece is rotatably connected to the swing shaft, the other end of the swing piece is lapped on the positioning rod, the middle part of the swing pieceis connected to the fixed rod through the elastic piece, and the induction switch is located above the swing piece. The anti-fatigue manipulator reclaiming detection device provided by the invention has the characteristics of not being easy to fatigue damage, low maintenance cost, high responsiveness and high reliability, and more accurate positioning.

The invention discloses a buoyancy tank, a using method thereof and a floating bridge, which relate to the technical field of floating bridges. The buoyancy tank comprises a plurality of buoyancy tankunits movably connected along a bridge, a water suction and drainage assembly is arranged in each buoyancy tank unit in a matched mode, and the water suction and drainage assemblies are configured inthe mode that when the water level outside the buoyancy tank units rises, the water suction and drainage assemblies suck water into the corresponding buoyancy tank units so that the buoyancy tank units can be kept at a preset elevation, and when the water level outside the buoyancy tank units descends, the water suction and drainage assemblies drain water in the corresponding buoyancy tank unitsso that the buoyancy tank units can be kept at the preset elevation. The mooring device and the telescopic device which are connected with the buoyancy tank can be stressed stably, fatigue damage is not prone to occurring, and long-term safe operation of the floating bridge is facilitated.