43results about How to "Reduce tangential force" patented technology

Tangential forces present at the mating area between a clamp-on transducer and a pipe can be made very small in order to provide a higher quality, more stable acoustic coupling. In some cases this is accomplished by providing a low friction bearing on a surface of a transducer housing. This bearing may be a slippery surface portion, or may involve a rotary bearing mounted on the housing. In other cases, where a steel pipe is used, pairs of permanent magnets coupled by a yoke can provide the desired clamping force directed solely along a radius of the pipe.

The invention discloses a rotary impact cushioning safety helmet. The rotary impact cushioning safety helmet comprises a shell and an elastic lining in the shell, a gap is formed between the shell andthe elastic lining, and a rotary impact cushioning device which makes the shell rotate relative to the elastic lining is arranged between the shell and the elastic lining. When the safety helmet is impacted by external force, the upward component force in the external force, which tangentially acts on the shell, makes the shell tend to rotate relative to the elastic lining. By means of the rotaryimpact cushioning safety helmet, through the tangential deformation of the rotary impact cushioning device, the shell can rotate by a certain angle relative to the elastic lining on the premise thatthe elastic lining relatively stays still, and accordingly, the cushioning effect that the impact of the external force on a user is greatly reduced is achieved.

The invention relates to a rotary indexing table comprising a stationary base unit and a plate rotatably supported thereon and drivable relative to the base unit by means of a drive, in which the drive is formed by a plurality of individual drive elements arranged in the circumferential region of the plate.

The invention discloses a method for manufacturing a rubber sealing ring of a dam gate. The method includes: manufacturing a rubber sealing ring, and reserving a plurality of sensor mounting holes in the rubber sealing ring; mounting a plurality of sensors in the mounting holes; and sealing the sensors in the rubber sealing ring by vulcanizing twice. The rubber sealing ring manufactured by the method is simple in structure, and compression change of the rubber sealing ring of the flood discharging dam gate can be sensitively detected, so that aging degree of the sealing ring is judged, and accidents of a dam are prevented.

The invention discloses a cooling coating for a light-emitting diode (LED) lamp and a preparation method thereof. The coating comprises the following components by weight percent: 30-55% of acrylic resin, 10-20% of amino resin, 5-10% of aluminium nitride, 2-15% of carbon fiber, 3-8% of pigment, 5-15% of mica, 1-2% of anti-settling agent, 10-20% of solvent, 1-2% of dispersant and 0.5-2% of flatting agent. The preparation method comprises the following steps: during preparation, mixing and grinding raw materials, and then dispersing the raw materials by a disperser; controlling the fineness of the coating within 15-30mu m, filtering and removing impurities, thereby obtaining the cooling coating. The cooling coating for the LED lamp disclosed by the invention has high radioactivity and high heat conductivity, and is sprayed on the surface of an LED apparatus; the temperatures on the surfaces of the apparatuses such as an LED lamp aluminum substrate and a cooling shell can be greatly reduced by the formed coating; the coating has the characteristics of excellent mechanical property and protection function, good waterproofness and weather fastness, and the like.

The invention discloses a rim assembly for automatically adjusting wind resistance, which includes a rim and spokes, the spokes are fixed on the rim, and rim windows are formed between the spokes, and the rim assembly also includes venetian blinds; the spokes An accommodating groove is provided along the side for accommodating the venetian blind; a groove is provided on the side of the rim close to the window of the rim, and the elastic member is connected to the venetian blind to rotate along the groove for shielding or Partially blocking the rim window, the present invention also provides a vehicle, the vehicle has the rim provided above, the present invention can realize the adjustment of the drag coefficient according to different vehicle speeds, and at the same time ensure the heat dissipation requirements of the brake.

The invention provides a bionics-based end mill with a special groove profile and a micro blade structure. The cutting edge part comprises peripheral cutting teeth and a chip pocket, the tooth number of the peripheral cutting teeth is 4, the peripheral cutting teeth consist of a first front mill surface, a second front mill surface and a rear mill surface, the radial profile of the first front mill surface is linear, the radial profile of the second front mill surface is in the shape of a parabola, and the coordinates of all points on the radial profile of the second front mill surface meet a parabola equation; the radial profile of the rear mill surface is linear; the chip pocket comprises the two parts of a main groove and an auxiliary groove, the main groove is connected with the second front mill surface, the radial profile of the main groove is in the shape of a parabola, the coordinates of all points on the radial profile of the main groove meet the parabola equation, the auxiliary groove projects outwards and is connected with the main groove and the rear mill surface, and the coordinates of all points on the radial profile of the auxiliary groove meet an equation: y=ax3+bx2+cx+d. The end mill has excellent strength and can inhibit the production of zigzag chips during titanium alloy processing. The cutting process is smoother, the workpiece surface quality is improved, and the service life of the mill is prolonged.

The invention relates to opposite roller spinning equipment, in particular to opposite roller spinning equipment for forming a large thin-walled cylindrical part, and aims to solve the problems that existing die spinning equipment is high in cost, poor in universality and long in manufacturing period as a core die is needed. A chuck substrate fixing base is installed on a rack between an internal rotation guide rail and an external rotation guide rail, a chuck substrate is installed on the chuck substrate fixing base, an external rotation mechanism fixing base is installed on the external rotation guide rail in a sliding mode, and an external rotation disc is installed on the external rotation mechanism fixing base; a bottom plate is installed on an internal rotation guide rail, a lifting motor is installed at the lower end of the bottom plate, one end of a lifting lead screw penetrates through the bottom plate, and the other end of the lifting lead screw is connected with a base; an internal rotation device fixing base is installed on the bottom plate, a worm and gear assembly is installed on the chuck substrate, a three-claw chuck is installed on the worm and gear assembly, multiple pull rods are connected with the external rotation disc, the chuck substrate and the base, an internal rotation device is installed in the internal rotation device fixing base, and the external rotation device is installed in the external rotation disc. The opposite roller spinning equipment is suitable for carrying out opposite roller spinning on the large thin-walled cylindrical part.

The invention relates to a direction-adjustable sensor mounting seat and a mounting method thereof. The technical problems that an existing sensor installation base is of a fixed structure, anchor rod installation errors cannot be corrected, errors exist in measurement results, and effective inversion parameters cannot be obtained are solved. The sensor mounting seat comprises an anchor rod and a positioning unit, wherein the positioning unit comprises a first module, a second module, a spherical base, a positioning pin and three connecting screw rods; the first module and the second module are connected to form a cube structure; hemispherical groove structures are formed in the lower portions of the first module and the second module, a spherical cavity is formed in the cube structure, and the spherical base is located in the spherical cavity; a positioning groove is formed in the center of the cube structure, the positioning pin is located in the positioning groove, and a screw hole is formed in the positioning pin; screw holes are formed in two mounting surfaces of the first module; the screw hole is used for installing a connecting screw, and the outer end of the connecting screw is used for installing a sensor.

The invention relates to a controllable-strength adhesion device, which includes a support member providing support for the controllable-strength adhesion device; an adhesion unit is arranged at one end of the support member, and the end of the adhesion unit away from the support member is in contact with the adhesion interface; The micro-vibration excitation generation module between the units, one end of the micro-vibration excitation generation module is consolidated with the support, and the other end is consolidated with the adhesion unit, and the micro-vibration excitation generation module drives the adhesion unit to generate micro-vibration; The excitation adjustment amplification module is provided with a communication interface, and the micro-vibration excitation adjustment amplification module is connected with the micro-vibration excitation generation module to adjust its vibration frequency and amplitude. It also relates to the regulation method of the device, the method can adjust the frequency and amplitude of the micro-vibration according to the demand, and can realize the adjustment of the stable adhesion strength to the target adherent, so as to complete the fast switching between adhesion and desorption. The invention can effectively solve the existing problems of difficult adhesion failure and uncontrollable strength between adhesion interfaces.

The invention discloses a method for manufacturing a rubber sealing ring of a dam gate. The method includes: manufacturing a rubber sealing ring, and reserving a plurality of sensor mounting holes in the rubber sealing ring; mounting a plurality of sensors in the mounting holes; and sealing the sensors in the rubber sealing ring by vulcanizing twice. The rubber sealing ring manufactured by the method is simple in structure, and compression change of the rubber sealing ring of the flood discharging dam gate can be sensitively detected, so that aging degree of the sealing ring is judged, and accidents of a dam are prevented.

The invention belongs to the technical field of public lighting equipment, and particularly relates to a hidden dustproof street lamp capable of freely descending, ascending and overturning. The hidden dustproof street lamp comprises a lamp post, a top cover, a bottom plate, a power part, a lifting part, an overturning part and a lighting part; through joint operation of the power part, the transmission part and the overturning part, the lighting part is hidden in the sliding groove; due to the fact that the street lamp is arranged on the roadside where dust is large, the lighting part is hidden in the sliding groove, so that compared with an existing street lamp, the lighting part is protected against damage, and the dustproof effect of the lighting part can be achieved; the lighting partcan be automatically lowered to a proper height, so that workers can maintain the lighting part conveniently, workers do not need to work at a high place, and the construction risk of the workers isgreatly reduced; and the angle of the lighting part during lifting can be controlled, so that the light angle of the street lamp can be adjusted according to environmental conditions.