127results about How to "Reduce lateral vibration" patented technology

The invention relates to a transverse stiffness-reinforced rail fastener comprising a base, an anchor bolt, a bar spring and an elastomeric bearing part. The base is fixed on a railway sleeper by the anchor bolt. The transverse stiffness-reinforced rail fastener is characterized by further comprising a guiding element arranged between the base and a steel rail. Interworking guiding surfaces are arranged on the guiding element and the base respectively, the guiding surfaces are all parallel to the steel rail and perpendicularly arranged and the elastomeric bearing part is arranged between the base and the guiding element. The transverse stiffness-reinforced rail fastener can ensure vertical elasticity of the fastener, maintain perfect transverse intensity and effectively prevent the steel rail from occurring deflection and shimmy. The transverse stiffness-reinforced rail fastener can realize effects of reducing vibrate and noise as the traditional rail fastener, can also retard or prevent abrasion of the steel rail so that service life of the steel rail is prolonged greatly. The transverse stiffness-reinforced rail fastener needs small assembling space, is an economic beneficial utility, and is compact in structure, cost effectively and wide in market application prospect.

A drill bit comprises a bit body having a plurality of upstanding main blades formed thereon. The main blades have a plurality cutting elements mounted thereon, and they are shaped such that a cutting profile of the bit includes a nose portion, an inner cone region located radially inwards of the nose portion and an outer region located radially outwards of the nose portion. The bit further has at least one additional blade. The additional blade carrying cutting elements located radially inwards of the outer region of the cutting profile, but being substantially free of cutting elements located in the outer region of the cutting profile.

Drilling systems and methods for enlarging a borehole that include at least one expandable reamer and at least one expandable stabilizer axially spaced therefrom in a tubular string such as a drill string, the at least one expandable reamer and the at least one expandable stabilizer being independently actuatable by different-sized actuation devices. A relatively lower tool is actuatable by a smaller actuation device, such as a drop ball, which passes through a relatively higher tool in the drill string without triggering the higher tool.

A system and method reduce lateral movement of a car in an elevator system by detecting vibration of the car as a vibration signal. A damping coefficient for a feedback signal is determined according to the vibration signal and a state of the elevator system. A semi-active actuator is arranged between the car and a roller guide assembly. The semi-active actuator includes a rheological fluid, and flow characteristics of the rheological fluid are actuated according to the feedback signal to reduce the lateral movement of the car.

The invention provides a bogie. The bogie comprises a framework, a transverse shock absorber, a traction pull rod, a traction beam and a center pin, wherein one end of the transverse shock absorber is fixed to the framework, the traction pull rod is fixed to the framework, the traction beam is fixed to the traction pull rod, and the center pin is fixed to the traction beam. The center pin is also connected with a vehicle body simultaneously, and thus, the vehicle body and the bogie can be connected together through the center pin and the traction beam. The other end of the transverse shock absorber is fixed to the traction beam through a transverse shock absorber support, the impact load is absorbed through the transverse shock absorber, and the taking comfort degree is well promoted. The transverse shock absorber support and the traction beam are of an integrated structure, and the assembly welding process of the traction beam of the integrated structure is omitted, so that the production efficiency is improved. Stress concentration generated by assembly welding is avoided, the strength of the traction beam is improved, and the powerful guarantee is provided for safe operation of a train. The invention further provides a rail vehicle.

Drilling systems and methods for enlarging a borehole that include an expandable reamer and an expandable stabilizer axially coupled above the expandable reamer. The expandable reamer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending blades carried by the tubular body, and a cutting structure carried by at least one blade of the plurality of blades, wherein at least one blade of the plurality of blades is movable outwardly with respect to the longitudinal axis. The expandable stabilizer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending bearing pads carried by the tubular body, wherein at least one bearing pad of the plurality of bearing pads includes an up-hole cutting structure carried thereupon and is movable outwardly with respect to the longitudinal axis.

The invention provides a built-in metal vibrator vibration and noise reduction dynamic vibration absorber structure of a steel rail. The structure is arranged on the two sides of a steel rail web between two adjacent fasteners and comprises coating body protecting layers, elastic damping bodies and metal mass bodies. Each elastic damping body is tightly attached and fixed to the steel rail and comprises a first elastic damping body and a second elastic damping body which are stacked and fixed into a whole, wherein the hardness of each first elastic damping body is larger than that of each second elastic damping body. Each metal mass body is made of multiple wriggling wavy metal plates which are nested in the corresponding elastic damping body at intervals. Each coating body protecting layer covers the exposed face of the corresponding elastic damping body. By the adoption of the structure, on the premise that the requirement for the sufficient strength of a damping material is met, thedamping effective working area is increased in a wriggling mode, the vibration transmission attenuation rate is increased, the damping material has two different degrees of hardness so as to meet thevibration reduction requirements in different frequency ranges, rail traffic operation noise can be effectively reduced from the position of a noise source, and utilization of the structure does notaffect maintenance of rail traffic original infrastructures and rails.

The invention discloses a novel suspension bridge center buckle device which comprises a cable clamp, a sling upper pulley, a double-strand sling, a vibration reduction frame, a sling lower pulley, adouble-strand sling fixing device, a space type inclined rod, a viscous damper and a space type inclined rod fixing device. The cable clamp is fixed to the midspan position of a suspension bridge maincable, and the upper ends of the suspension cable upper pulleys and the upper ends of the inclined rods are fixed to the cable clamp. The double-strand slings form a closed loop through upper and lower pulleys, and a plurality of damping frames are arranged in the middle of the double-strand slings; and the viscous damper is fixed in the middle of the inclined rod. The sling forms a closed loop through the upper pulley and the lower pulley, the vibration reduction frame is arranged, and the viscous damper is arranged on the inclined rod, so that longitudinal vibration of the short sling is reduced, and damage to an anchor head of the sling due to longitudinal reciprocating motion is prevented; by arranging the space type inclined rods, transverse vibration of the short slings is reduced.The device can be arranged in the midspan of the suspension bridge and used for multi-directional damping of the midspan short slings.

The invention belongs to the technical field of battery detection, and particularly relates to an electric automobile battery voltage detection system. The problems that a function circuit needs to beadditionally arranged for an existing battery voltage detection circuit, a measurement voltage range is limited by a measurement range of a function module integrated by a microcontroller, and when it is detected that battery voltage breaks down, a battery is inconvenient to maintain or replace need to be solved, so that the electric automobile battery voltage detection system comprises an automobile body, the battery, a voltage conversion module, a reference voltage module, a comparator, a controller, a voltage dividing module and an alarm unit, wherein the battery, the voltage conversion module, the reference voltage module, the comparator, the controller, the voltage dividing module and the alarm unit are connected in series. According to the system, no function circuit needs to be extra added to the voltage detection of the battery, and meanwhile, the measurement voltage range is not limited by the measurement range of the function module integrated by the microcontroller; and through the arrangement of a mounting base, on the one hand, the battery can be buffered and protected, on the other hand, the battery can be conveniently taken out and maintained.

The invention relates to rail accessories, in particular to a rail fixing device with the function of vertical guidance. The rail fixing device comprises a base disposed on a sleeper. The base is fixedly connected with the sleeper through anchor bolts. The rail fixing device is characterized by further comprising a guide component and a vertical support element. The guide component comprises a guide element and a guide support located on two sides of a rail web of a steel rail. The transverse stiffness of the guide element is at least 120KN/mm. The guide element is tightly contacted with the steel rail at least from the top and bottom of the rail web of the steel rail and transversely limits the steel rail. The guide element is clamped by the guide support. Slide contact surfaces are arranged between the guide element and the guide support and are parallel to the vertical direction of the steel rail, and the guide element and the guide support can slide relative to each other along the vertical direction of the steel rail. The vertical support element is located below the steel rail and has elastic supporting capacity at least in the vertical direction of the steel rail. The guide component on two sides of the rail web is used for guiding, the vertical support element below the steel rail is used for supporting and power consuming, and accordingly stressing stability of the steel rail is improved effectively and the safety is better.

The invention discloses a building anti-seismic crane support and a using method thereof, and relates to the field of building anti-seismic crane supports. The invention particularly relates to the building anti-seismic crane support and the using method thereof, aiming at the problems that in an existing device, only one damping structure is arranged, the damping effect is not ideal, the stability of the device is not firm, the use is not safe and reassurance, the design is not reasonable and the like, the following scheme is provided at present, building anti-seismic crane support comprisesa stand column, the lower surface of the stand column is fixedly connected with a connecting base, the lower surface of the connecting base is fixedly connected with a connector, one end of the connector is rotationally connected with a supporting rod, the upper end of the supporting rod is rotationally connected with a mounting head, the lower surface of the connector is fixedly connected with asupporting column, a damping base is fixedly connected to the side wall of one side of the supporting column, and a hollow structure is arranged inside the damping base. According to the invention, multiple damping structures are arranged, so that the damping effect is more ideal, the stability is good, the use is safe and reassurance, the design is reasonable, the installation is convenient, andthe use is convenient.

A cutting insert according to an embodiment of the present invention includes an upper surface; a lower surface; a side surface located between the upper surface and the lower surface; at least one concave part extending in a thickness direction in the side surface, and having one end thereof located at the upper surface; and a cutting edge which is located at an intersection region of the upper surface and the side surface, and is divided into a plurality of divided cutting edges with the at least one concave part interposed therebetween. The upper surface includes a first raised part located inwardly of the at least one concave part, and a plurality of second raised parts respectively located inwardly of the plurality of divided cutting edges. The plurality of the second raised parts are located inward compared to one end of the first raised part close to the cutting edge in a top view. A cutting tool including the cutting insert, and a method of manufacturing a machined product using the cutting tool are also provided.

The invention relates to the technical field of AC asynchronous motors, and discloses an AC asynchronous motor with good heat dissipation effects and high stability. The motor comprises a motor body,a rotating shaft is fixedly installed on the output shaft of the motor body, uniformly distributed heat dissipation sheets are fixedly connected to the outer wall of the motor body, and a support block is fixedly connected to the bottom of the motor body. According to the invention, by setting the heat dissipation sheets, compared with the conventional conditions, each heat dissipation sheet comprises an arc-shaped heat dissipation groove, so the heat dissipation area is increased and heat dissipation efficiency is quite high; by setting a water cooling tank and an internal water cooling bottle, when the motor speed is too high, the cold water in the water cooling bottle can effectively absorb heat, and all the heat dissipation sheets are uniformly distributed on the exterior of the motorbody in a circular arc shape, and the brush is periodically dialed back and forth and under the functions of a first sliding slot and a sliding rod, the brush will clean the dust on the surfaces of the heat dissipation sheets to prevent heat accumulation; and the motor has a simple structure, and can effectively dissipate heat.

The invention relates to an electrode wire for one-way silking electro discharge machining. The electrode wire comprises a core material and a case layer, wherein the case layer comprises a fast discharging cutting layer, a low-damage fine trimming layer and a lubrication gap; the fast discharging cutting layer covers the surface of the core material; the low-damage fine trimming layer is arranged on the surface of the electrode wire; the lubrication gap is formed between the fast discharging cutting layer and the low-damage fine trimming layer; the fast discharging cutting layer is prepared from the following ingredients in percentage by mass: 40 to 65 percent of zinc, the balance copper and unavoidable impurities brought by the raw materials; the low-damage fine trimming layer is prepared from the following ingredients in percentage by mass: 80 to 100 percent of zinc, the balance copper, and unavoidable impurities brought by the raw materials. The invention also relates to a preparation method of the electrode wire. Compared with the prior art, the electrode wire provided by the invention can realize the fast discharging cutting; the low-damage corrosion processing can be realized; a workpiece is enabled to reach the specified quality requirements; the processing precision is effectively improved.

The invention provides a roller-cone polycrystalline diamond compact (PDC) two-stage cutting compound drill bit, comprising a PDC drill bit body, blade wings and roller cones, wherein the blade wingsare arranged at the top end of the PDC drill bit body, and the blade wings and the PDC drill bit body form an integral structure; cutting teeth are embedded and welded at one sides of the top ends ofthe blade wings; gauge protection parts are arranged at the outer sides of the blade wings, and are connected with the blade wings in a welding way; gauge protection teeth are embedded and welded on the outer walls of the gauge protection parts; an oil storage cavity is arranged at the top end of the PDC drill bit body. By improving a compound drill bit, the roller-cone PDC two-stage cutting compound drill bit has the advantages that the structural design is reasonable, layer-by-layer cutting can be realized, a roller-cone drill bit and a PDC drill bit complement the advantages of each other,and the drill bit is good in guiding effect, high in stability, strong in well deviation control ability, less in local hydraulic loss, low in energy consumption of ground power equipment, high in drilling efficiency, low in drilling cost and high in practicality; therefore, the problems and deficiencies raised in the background technology of the invention are effectively solved.

The invention relates to technical field of petroleum equipment, in particular to a self-washing-free double-cone PDC cone composite drill bit. A screw thread is connected to the top end of a drill bit body. The left side wall and the right side wall of the upper end of the drill bit body are each provided with a screwing-off nut. Three gauge protection bodies and three cone connection bodies arearranged and are evenly connected to the outer wall of the drill bit body in an alternate manner. Diamond particles are connected to the outer wall of the gauge protection bodies in an embedded manner. Cone connection column installation grooves of cones sleeve the bottoms of cone connection columns of the cone connection bodies. Crowns are arranged at the bottom ends of the gauge protection bodies, and PDC cutting teeth are connected to the bottoms of the crowns. Chip discharging grooves are formed in the bottom ends of the PDC cutting teeth in a round manner. Circumferential water holes areformed in the bottom end of the drill bit body, and center water holes are formed in the bottom ends of the crowns. A PDC drill bit and a cone drill bit are composited to achieve a two-stage cutting function, the drilling efficiency is improved, the damage to the drill bit from stratums is relieved, and the service life of the drill bit is prolonged.

The invention discloses a preparation process of antibacterial wool knitted fabric. The antibacterial wool knitted fabric comprises the following components in parts by weight: 25-35 parts of wool, 40-46 parts of polyester fibers, 45-56 parts of flax and 10-16 parts of a modified antibacterial agent. According to the preparation process of the antibacterial wool knitted fabric, an antibacterial treatment process is additionally arranged between a drying treatment process and a bristle treatment process; the antibacterial performance of the fabric can be greatly improved, the modified antibacterial agent is prepared, and under the illumination condition, titanium dioxide in the modified antibacterial agent can be in contact with water and oxygen in an environment to generate negative oxygenions and hydroxyl radicals. The fabric has high purification effect, is convenient for cleaning stains and has strong sterilization performance. The use safety of the fabric is ensured, and the surfaces of the woven fabric wool, the polyester fibers and the flax can be prevented from being stained with oil stain on the surface of a weaving machine in the woven fabric. Relative stability can be ensured, and transverse vibration of the weaving mechanism can be effectively reduced.

The invention discloses a handheld farming machine engine damping device, which comprises a base. A longitudinal damping module and a transverse damping module are arranged above the base; the longitudinal damping module comprises an engine connecting plate which is horizontally arranged, and a plurality of longitudinal dampers used for supporting the engine connecting plate are arranged between the engine connecting plate and the base; the multiple longitudinal dampers are evenly arranged at intervals by taking the center line of the engine connecting plate as the center and surrounding the center; and the transverse damping module comprises a support fixedly connected to the front part of the longitudinal damping module, an elastic connecting piece is arranged between the support and theengine connecting plate, and the support and the engine connecting plate are connected through the elastic connecting piece. The handheld farming machine engine damping device is simple in structureand can consume vibration energy brought by an engine, thus vibration transmission for handles is lowered, and the discomfort feeling of an operator is relieved.

The invention discloses a bus low residual voltage protection device for a power transmission and transformation system, and relates to the technical field of circuit protection devices. The device comprises a cabinet body and a mounting plate. The mounting plate is positioned below the cabinet body; the bottom of the cabinet body is fixedly connected with a first supporting plate and a second supporting plate; a guide rail is fixedly connected with the mounting plate; a first sliding block and a second sliding block which slide along the axis of the guide rail are slidably connected with theguide rail; a first baffle and a second baffle are fixedly connected with the mounting plate; the first baffle is located on the outer side of the first sliding block; a first spring is arranged between the first sliding block and the first baffle; a second spring is arranged between the second sliding block and the second baffle; third springs are arranged on the outer sides of the first baffle and the second baffle. According to the invention, vibration impact is buffered, so that the cabinet body is damped; reliable line connection in the cabinet body is kept; and the operation stability ofthe device is improved.

The invention discloses an engine damping device. The engine damping device comprises a bottom plate, a rubber column is arranged at the top of the bottom plate, an aluminum profile heat absorption and dissipation plate is fixed to the top of the rubber column, an engine body is installed at the top of the aluminum profile heat absorption and dissipation plate, and a fixing plate is fixed to the top of the bottom plate. When the engine body is subjected to vibration, a connecting rod is compressed to move downwards, the connecting rod drives a sliding sleeve to transversely slide, the slidingsleeve transversely slides to compress a second spring, the second spring provides an opposite force for the sliding sleeve under the stress effect of the spring, vibration borne by the engine body can be effectively reduced, and through cooperative use of the fixing plate, a rubber block and a first spring, the transverse vibration of the engine body is reduced. By means of cooperation of the connecting rod, the second spring, the sliding rod and the sliding sleeve, vertical vibration and transverse vibration of the engine body can be reduced at the same time, vibration generated when the engine works is effectively relieved, the service life of the engine is prolonged, and noise generated by the engine is reduced.