53results about How to "Reduce fatigue stress" patented technology

A unique positioning of a discharge tube relative to a pivot axis of a check valve in a compressor reduces the wear and fatigue stresses on the pivoting check valve components. The tube is centered on an axis that is non-perpendicular to an axis that is parallel to the pivot axis of the check valve, and in one embodiment was at 45°. With the inventive positioning of the discharge tube relative to the pivot axis, the flow streamlines heading from the discharge port to the discharge tube are no loner normal to the flapper valve surface, and the amount of wear between moving valve components and fatigue stresses are reduced.

The invention discloses a service method and a service device of a customer service system. The method comprises the steps of receiving a speech synthesis command; determining a speech text to be synthesized according to the received speech synthesis command; synthesizing speech, with the tone feature of a customer service person, of the speech text to be synthesized according to the determined speech text to be synthesized and a speech parameter model base pre-built according to the tone of the customer service person currently answering a call; and receiving a command of the customer serviceperson, and playing a sentence composed of the synthesized speech and / or the artificial speech of the customer service person. The sentence composed of the synthesized speech with the tone feature ofthe customer service person and / or the artificial speech of the customer service person is played to the user, so that the speech amount of the customer service person during an artificial service process is greatly reduced, and fatigued pressure of the customer service person is reduced, and a user thinks that the customer service person talks with him / her all the time, so that the quality of service of the customer service system is improved, and the user experience is enhanced.

The invention provides a fixed connection structure used for high speed railway sound barrier transparent cell boards, belonging to the field of railway components. The structure comprises a sound barrier 1, a main buffering sealing joint strip 2, an aluminium alloy section frame 3, a side buffering sealing joint strip 4, an aluminium alloy bracket 5, a steel angle plate 6, a steel angle plate pulling plate 7 and an aluminium rivet 8, wherein the aluminium alloy section frame 3 is provided with a groove 31, a long groove 33, a side groove 34, a side hole 35 and a rectangle center hole 36; a wall board 32 is arranged under the aluminium alloy section frame; the groove 31 is used for placing the main buffering sealing joint strip and then placing the sound barrier; the long groove 33 is arranged on the wall board 32 and connected with a hook of a steel angle pulling plate bend angle 71; the side groove 34 is used for placing the side buffering sealing joint strip 4; the side hole 35 is inserted with the aluminium alloy bracket 5; and the rectangle center hole 36 can be inserted with the steel angle plate 6 which is riveted with the wall board 32 after punching through with the connection angle of 90 degrees. The fixed connection structure has the advantages of being capable of bearing the impact effect of pulsating wind loading generated by high speed train, and being capable ofstably bearing the load of air mechanics for a long time.

Devices, systems and methods for delivering a curable, stabilizing material into a central region of a bone structure. Precise placement of the curable substance into a central region of a bone structure through a unipedicular approach. One primary advantage is its ability to create a central cavity in a vertebral body (or to centrally deliver bone cement) through a unipedicular approach. A curved needle having increased rigidity in its flexible end when the end is disposed in its straight position. This increased rigidity is due to a novel tensioning mechanism and to a segmented tube design (as opposed to the conventional longitudinally-slotted tube design).

A branch connector in a fuel pressure accumulating container is joined with a through hole formed on a peripheral wall of the pressure accumulating container. The branch connector is inserted deeply into the through hole until the distal end of the branch connector is projected from the inner peripheral wall surface of the pressure accumulating container. Thus, the internal pressure fatigue strength is improved by lowering the maximum stress value generated at the internal peripheral edge at the lower end of the branch connector.

A shaft / hub connection between a shaft rotatably driven about an axis of rotation, and a hub disposed on the shaft so as to be non-rotatable relative thereto. The hub has a conical opening and an end face at that end of the hub having the greatest inner diameter. The hub also has at least one relief groove that extends into the hub from the end face thereof. A conical shaft extension on the shaft extends into the conical opening of the hub and is held in the hub via a conical pressure connection.

The invention provides a steel bridge light pavement layer structure and a paving method and relates to the technical field of steel bridge paving. The fatigue stress of a bridge deck steel structurecan be effectively reduced, the local rigidity of a bridge deck system can be greatly enhanced, and the fatigue life of a steel bridge deck can be prolonged. The steel bridge light pavement layer structure comprises the steel bridge deck, a cement concrete layer, an adhesive layer and a multifunctional thin layer in sequence from bottom to top; the two adjacent layers are connected with each other; a reinforcement mesh is arranged in the cement concrete layer; the reinforcement mesh is fixedly connected with the steel bridge deck through a plurality of short bolt nails; the multifunctional thin layer is an open-graded or cut-off graded asphalt concrete thin layer; and the thickness of the multifunctional thin layer is 10-25 mm. The steel bridge light pavement layer structure provided by the technical scheme of the invention is suitable for steel bridge paving processes of new construction and bridge deck large and medium-sized repairing.

This invention is an ergonomic computer mouse. The computer mouse body has a unique design in shape that may change the way for people to use a computer mouse. It is designed to be handheld by ring finger, little finger, and the hand part between thumb and index finger with a grip handle. A rear extrusion is smoothly curved and is designed to create a curved support area for the hand part between thumb and index finger. A trackball is confined in the body with a spherical housing and partially exposed on right side and left side of the body. The trackball is arranged near the middle of the body and above the grip handle so that thumb can reach it and operate it in its natural posture. A trackball cover is designed to separate the trackball and hand palm. Two click buttons and scroll wheel are arranged vertically on the fore edge of the body so that index finger and middle finger can naturally reach and operate them. A finger guard ring is designed to help adjusting the body's location in a hand palm with ring finger and little finger. A curved top edge and a front extrusion are designed to make the body shape look aesthetic. Two spherical extrusions on each side of the body are designed to provide 3-points support together with trackball on a flat surface. People can hold and use the mouse at any desired orientation without a flat surface and can use either right hand or left hand to operate it. It can also be used on a flat desk surface (even on a transparent flat surface) as people use a regular computer mouse. It allows people to take a comfortable desired posture to operate the computer mouse and allows people to change hand to operate it. As a result it can reduce discomfort, pain, and fatigue injury on a user's hand, arm, and shoulder when the user works on a computer with this invention.

The invention discloses a high-performance steel bridge deck structure. The high-performance steel bridge deck structure is characterized in that a grating layer filled with fillers is arranged between a conventional bridge deck surface layer and an orthotropic steel bridge deck slab additionally. The grating layer comprises cases and the fillers in the cases. The cases are formed by separation ofseparation plates. Different types of grating layers can be selected flexibly to meet rigidity and strength requirements of the bridge deck structure design. The high-performance steel bridge deck structure has the advantages that the problems of proneness to fatigue rupture and poor adhesion between bridge deck surface layers and orthotropic steel bridge deck slabs of conventional steel bridge deck structures are solved effectively, and the high-performance steel bridge deck structure can be widely applied to construction, maintenance and reinforcement of various steel bridge decks.

An aircraft undercarriage having a sliding rod slidably mounted in a strut-leg, and a scissors linkage (4) having one branch (4a) hinged to the strut-leg or to a turning element of a control for steering the sliding rod mounted to turn in the strut-leg, and one branch (4b) hinged to the sliding rod, the branches being hinged to each other by a pivot pin (12), the undercarriage being fitted with a shimmy-attenuator device (10a, 10b) placed on the pivot pin of the shimmy-attenuator, the attenuator device including threshold resilient return means generating a force returning the branches towards a rest position, and at least damping means generating a damping force when the branches move axially along the pivot pin. The attenuator device comprises two modules (10a, 10b) placed on either side of the scissors linkage in order to co-operate with the pivot pin, each of the modules performing at least one of the damping function and the threshold resilient return function.

A rotor for an electrical inductor motor or an induction generator includes a core having spaces formed in the core. The rotor also has a first end ring. The first end ring has a first hub portion. A first ring is connected to the first hub portion by first spokes. The rotor also has a second end ring. The second end ring has a second hub portion. A second ring is connected to the second hub portion by second spokes. The first end ring is secured to the core. The second end ring is rotated a predetermined amount so the first spokes are misaligned with the second spokes. The second end ring is connected to the first end ring and the core. The core, the first end ring and the second end ring form a substrate. An aluminum conductor is cast to the substrate. The aluminum conductor fills in the spaces and around the first and second spokes to form a cast rotor.

The invention relates to a novel vertical mechanical reversing energy-saving pumping unit. The novel vertical mechanical reversing energy-saving pumping unit is characterized in that a transmission system adopts a mechanical reversing, two-way gear drive and oil-immersed lubrication fully-enclosed reduction gearbox for realizing the positive and negative rotation of a head sheave of the pumping unit, to ensure the immense inertia of a pumping rod and a counterweight to decelerate, buffer until stop before the pumping unit runs to an upper dead point or a lower dead point, a crank buffer device is arranged so that the impact energy is smoothly absorbed and stored, the stored energy is released after passing through the upper dead point and the lower dead point, and a motor is started at an upper dead point or a lower dead point under the conditions of basically smooth input speed and torque. Through the adoption of mechanical reversing and closed oil-immersed lubrication, the adaptability of the pumping unit to the harsh environment is higher; as the motor runs in the same direction all the time, a complex electric control system is not provided, the reliability is high, and the servicing, the maintenance and the repair are simple; and the equipment is controlled to run by a PLC (programmable logic controller), and importantly, the system adopts a two-way backup, and therefore, both the reliability and the stability of the pumping unit are enhanced.

The invention discloses a variable-wall-thickness flexible gear of a harmonic reducer. The variable-wall-thickness flexible gear is integrally formed by a harmonic tooth segment, a fixed-wall-thickness segment, an arc transition segment, a variable-wall-thickness segment and a flange segment. One side of the fixed-wall-thickness segment and one side of the harmonic tooth segment are fixedly connected, and the other side of the fixed-wall-thickness segment is fixedly connected with the inner circle of the variable-wall-thickness segment through the arc transition segment. The outer circle of the variable-wall-thickness segment is fixedly connected with the inner circle of the flange segment. Compared with the prior art, the fatigue stress of the flexible gear during loaded running of the harmonic reducer can be reduced, the risk that fatigue failures happen to the flexible gear can be reduced, the service life of the flexible gear can be prolonged easily, and the variable-wall-thicknessflexible gear has the value of application and popularization.

A shaft / hub connection between a shaft rotatably driven about an axis of rotation, and a hub disposed on the shaft so as to be non-rotatable relative thereto. A conical shaft extension on the shaft extends into a conical opening of the hub and is held in the hub via a conical pressure connection. The hub is provided with a stress-relieving or antifatigue arrangement for reducing the dynamic fatigue stresses that occur on the hub during operation. The shaft / hub connection is advantageously utilized for connecting the crankshaft of the internal combustion engine of a manually guided implement with a flywheel.

The invention provides a flexible gear and a harmonic reducer. The flexible gear comprises a gear section (1), a flange section (5) and a corner section (3) between the gear section (1) and the flangesection (5), and the corner section (3) is a curve section of a variable thickness transition; and the curve section of the variable thickness transition comprises a first variable thickness section(a), a second variable thickness section (c) and a transition section (b), the first variable thickness section (a) is relatively close to the flange section (5), the second variable thickness section(c) is relatively close to the gear section (1), and the transition section (b) is connected between the first variable thickness section (a) and the second variable thickness section (c). Accordingto the flexible gear, the transition thickness of a thin-wall section and a visor section of the flexible gear is effectively increased. Compared with a common flexible gear, the flexible gear strength of the flexible gear is increased, the fatigue stress of the flexible gear during load operation of the harmonic reducer is reduced, the failure risk of the corner section of the flexible gear is reduced, the service life of the flexible gear is favorably prolonged, and the reliability of the harmonic reducer is improved.

The invention discloses a high-performance thermal-insulation mortar, and belongs to the technical field of external wall thermal-insulation mortar. The high-performance thermal-insulation mortar is composed of, by mass, 25 to 40% of PO.42.5 cement, 50 to 70% of glass microbead, 0.5 to 2% of high-performance hollow ceramic microbead, 1 to 1.5% of polypropylene fiber, 2 to 4% of polymer latex powder, 0.2 to 0.4% of cellulose ether, 0.1 to 0.3% of a high-efficiency water reducing agent, 0.1 to 0.2% of an air entraining agent, 0.1 to 0.2% of organic silicon water repellent agent, and 1 to 1.5% of wood fiber. The high-performance thermal-insulation mortar is a single-component light dry mortar specially used for external wall thermal-insulation surface layers; combustion performance is capable of reaching A-class non-combustible; the high-performance thermal-insulation mortar is capable of preventing flame spread effectively, is a thermal-insulation material with excellent performance, is capable of protecting internal thermal-insulation layers from aging and deformation effectively, and prolonging service life of thermal-insulation systems.

A rotor for an electrical inductor motor or an induction generator includes a core having spaces formed in the core. The rotor also has a first end ring. The first end ring has a first hub portion. A first ring is connected to the first hub portion by first spokes. The rotor also has a second end ring. The second end ring has a second hub portion. A second ring is connected to the second hub portion by second spokes. The first end ring is secured to the core. The second end ring is rotated a predetermined amount so the first spokes are misaligned with the second spokes. The second end ring is connected to the first end ring and the core. The core, the first end ring and the second end ring form a substrate. An aluminum conductor is cast to the substrate. The aluminum conductor fills in the spaces and around the first and second spokes to form a cast rotor.

A drilling device for a down-the-hole drilling apparatus. The drilling device includes in a guide, a drilling member and a flushing mechanism configured to flush drilling waste. The drilling mechanism includes first and second drilling bit arrangements that are movable with respect to the drilling device and that are arranged to be expanded to drill a hole having a greater cross-sectional surface area than an end of the casing and arranged to be reduced to a size smaller than the end of the casing. Bit pieces of the second drill bit arrangement expand and reduce the second drill bit arrangement. The bit pieces expand the second drill bit arrangement by moving in a radial direction outwards in slide grooves, by rotating the guide in a drilling direction, and move in the radial direction inwards in the slide grooves, by rotating the guide in an opposite direction.

The invention discloses a cylinder wall thickness gradual change type cup-shaped flexible gear and a harmonic gear transmission device, relates to the technical field of transmission devices. the service life of the flexible gear can be prolonged, and the service life of the harmonic gear transmission device can further be prolonged. The cylinder wall thickness gradual change type cup-shaped flexible gear comprises a gear ring, a cylinder body, a cylinder bottom and a flange, wherein the cylinder body comprises a linear cylinder body section, a thin-wall cylinder body section and an arc transition section which are connected in sequence, the shape of the outer wall side of the thin-wall cylinder body section and the arc transition section are composed of a first thickening thickness curve section and a second thickening curve section which are tangent to each other, the gear ring, the linear cylinder body section, the thin-wall cylinder body section, the arc transition section and the cylinder bottom are connected in sequence, and the flange is arranged on the surface, away from the arc transition section, of the cylinder bottom; the shape of the outer wall side of the first thickening curve section is composed of a first curve circular arc and a second curve circular arc which are tangent to each other, the outer wall side of the linear cylinder section is connected with the first curve circular arc in a tangent mode, and the second curve circular arc is connected with the outer wall side of the second thickening curve section in a tangent mode.

A process for exchanging heat in a shell and tube gas-to-gas heat exchanger between a plurality of gases, said process comprising passing a cold first gas in parallel flow to a second hot gas to provide a warmer first gas; and passing said warmer first gas in counter-current flow to a hot third gas to provide a cooler said third gas. The invention provides increased minimum tube wall temperature within the exchanger for given process conditions while maintaining a high log mean temperature differential allowing for the prevention of corrosion from entrained corrosive vapours or entrained corrosive mist with a minimal increase in effective area.

The invention relates to a multi-functional mop comprising a mop head and a handle and the mop is characterized in that: the handle is a hollow pipe, the upper end of which is provided with a section of soft extensible pipe and the other end of the hollow pipe is provided with a water pipe joint; the handle is provided with a water flow controlling switch, which can be divided into three gears: including the large water flow, the medium water flow and stopping water supplying. The hose of the multi-functional mop can be externally connected with the water source, therefore the use is convenient and the trouble of going for water is avoided, therefore a lot time is saved and the exhaustion and stress of labor is reduced.

The invention relates to a railway vehicle chassis edge beam connecting structure suitable for a drum-shaped vehicle body, which is characterized in that a chassis edge beam is a full-length roll bending piece, the section of the chassis edge beam is of a groove-shaped structure, and the chassis edge beam is provided with a side surface, an upper wing surface and a lower wing surface, the side surface has an inclination angle consistent with that of a side wall plate; the upper end of outer side of the side surface is provided with an inwards recessed pressing table; the side wall plate is lapped on the pressing table and is welded and fixed in a butt welding manner; a downward vertical flange is arranged at the inner end of the lower wing surface, a vertical plate is welded and fixed between the upper wing surface and the lower wing surface, and the inner side surface of the vertical plate and the inner side surface of the vertical flange of the lower wing surface of the underframe boundary beam are coplanar and serve as a mounting surface of the under-vehicle equipment hanging seat; the upper plane of the underframe beam is flush with the upper wing face of the underframe boundary beam, and the two ends of the underframe beam are fixedly welded to the inner surfaces of the side faces of the underframe boundary beam. According to the railway vehicle chassis edge beam connecting structure, a mode of hanging the boundary beam of the under-vehicle equipment is realized, and the problem of large fatigue stress at the joint of the side wall upright post and the floor is solved;the processing difficulty and the assembling difficulty of the cross beam are reduced; and the weight of a vehicle body is reduced.

The invention provides a punching die waste discharging mechanism and a punching die thereof. The punching die waste discharging mechanism comprises a punch, the punch is in intermittent fit with multiple discharging holes, the multiple discharging holes are formed in a rotary workbench in an annular array manner, and the rotary workbench is movably installed on a discharging fixing base through a rotating shaft. Punching oil release holes are formed in the multiple discharging holes, the end, away from a one-way air inlet piston, of an extrusion connecting rod movably abuts against an oil pumping protruding rotary disc, and the oil pumping protruding rotary disc is fixedly installed on the rotating shaft of the rotary workbench. The arrangement of the rotary workbench is adopted, different punching holes alternately cooperates with the punch for punching operation, the punching oil release holes are formed in the punching holes, punching oil released by the punching oil release holes is bidirectionally smeared in each cooperation process of the punch and the punching holes, fatigue stress between dies is greatly reduced, the die is prevented from being damaged in the high-strength machining process, and the service life of the die is further prolonged.

A novel bolted fastener for urban rail transit is used for effectively reducing the overturning of a steel rail and the dynamic stress of an elastic strip, improving the stability of the steel rail and greatly prolonging the fatigue service life of the elastic strip. The novel bolted fastener comprises an iron backing plate, an elastic strip, an under-rail elastic backing plate, a T-shaped bolt, alocknut, a special-shaped flying-preventing flat washer and insulating damping track gauge blocks, the iron base plate is fixedly installed on the under-rail foundation through anchor bolts, an under-plate elastic base plate is arranged below the bottom face of the iron base plate, and the steel rail is located on the iron base plate. The insulating damping track gauge blocks are located on the top face and the outer side of the steel rail bottom. The lower end of the T-shaped bolt is installed on the iron base plate, the upper portion of the T-shaped bolt is sleeved with the special-shaped anti-flying flat washer and the locknut to press the elastic strip, the front end of the elastic strip acts on the top face of the insulation damping gauge block, and the rear end of the elastic stripacts on an iron base plate boss.

The invention discloses an anti-vibration pad used for a three-dimensional loom. The anti-vibration pad used for the three-dimensional loom comprises a base; the base is sequentially provided with a rubber plate B, a box cover, a cover plate, a rubber plate A and a top cover; and a plurality of damping spring vibration dampers are arranged between the box cover and the cover plate, and a steel ball is arranged on the rubber plate B. Interference force between the three-dimensional loom and the ground can be bi-directionally separated. As long as the array forms and quantities of the damping spring vibration dampers are rationally configured, the anti-vibration pad can be used for various types of flat and round three-dimensional looms. The anti-vibration pad of the structure is also suitable for other working machinery, even seismic design of a large structure.

The invention discloses a method for obtaining the maximum energy tracking of a natural flow field. The method comprises the following steps: S1, establishing an expression relationship of energy capture calibration; S2, determining the parameter value of the energy capture calibration expression relation, further comprising: S2.1, initializing the parameter value of the expression relation; S2.2,calculating the process calibration value according to the current parameter value in real time; S2.3, compensating the measured value of the flow field sensing component with the calibration value in real time; S2.4, real-time analyzing the conversion amount of the flow field energy and the change of the conversion amount; S2.5, the adjustment quantity and the adjustment relation of the parameter value are given in real time; S2.6, judging whether the parameter adjustment is finished in real time; S2.7, after that parameter adjustment judgment is complete, the calibration parameter value andthe calibration relation are given; S3, perform compensation calibration on that output of the flow field sensing component. The energy capture direction calibration realized by the invention increases the energy conversion amount and reduces the fatigue stress of the mechanical component, and effectively solves the problem of misalignment of the energy capture direction of the natural flow field.

The invention discloses a variable pitch mechanism which comprises a hub, a rotor blade, a variable pitch bearing and a reinforcing portion. The rotor blade is arranged in a wind facing manner and drives the hub to rotate. The variable pitch bearing is connected with the hub and used for adjusting the wind facing pitch angle of the rotor blade. The reinforcing portion is arranged between the variable pitch bearing and the rotor blade, and used for reducing elastic deformation of the variable pitch bearing. The variable pitch mechanism is simple in structure, is used for reducing the elastic deformation of the variable pitch bearing and reducing fatigue stress borne by the hub, and the problem that the service life of the variable pitch mechanism is short is solved. In addition, the invention further discloses a wind power generator comprising the variable pitch mechanism.