98 results about "Friction loss" patented technology

The application discloses a kind of magnetic suspension ORC units and control method, it is related to low-temperature waste heat power generation technical field;The unit includes magnetic suspension motor, turbine, evaporator, preheater, condenser, liquid storage tank, working medium pump and control system;Magnetic suspension motor is coaxial direct connection with turbine, and constitutes oil-free integrated closed structure;Control system includes PLC controller, four-quadrant frequency converter, turbine inlet regulating valve, hot gas bypass valve and sensor assembly;PLC controller inside preset turbine performance curve and working medium property model, configured to: real-time calculation turbine import and export pressure ratio, query performance curve to determine the best speed target value, through adjusting turbine inlet regulating valve control magnetic suspension motor speed track the target value.The application solves the problems of large mechanical friction loss, high maintenance cost and low variable condition efficiency of existing ORC unit, and realizes efficient and stable operation of the unit under wide operating conditions through collaborative control strategy.

The present application belongs to the technical field of machine tool equipment, and in particular to a top pin structure of a vertical cradle five-axis turning and milling combined machine tool, comprising a machine tool, wherein the base of the machine tool is arranged in a U shape with the opening direction facing upwards. The structure, by arranging the top pin mechanism, significantly improves the accuracy and motion stability of the top pin pressure adjustment, the rolling contact design of the main and auxiliary balls greatly reduces the friction loss in the force transmission process, and the fine adjustment of the top pin pressure can be realized through the threaded transmission of the threaded rod, meeting the pressing needs of different material rods; the pre-compression structure of the spring provides stable pre-tightening force and realizes fast resetting of the top pin, avoiding jamming; the design of the guide sleeve and the hard alloy contact end limits the radial swing of the top pin, ensures the coaxiality of the top pin and the material rod, reduces the machining eccentricity error, and on the other hand, enhances the wear resistance of the top pin and prolongs the service life; the overall structure makes the top pin bear force evenly, effectively avoids the displacement of the material rod under pressure, and improves the workpiece size accuracy.

A scroll compressor is provided. The scroll compressor can comprise a housing, a drive motor, a stationary scroll, a rotating scroll, a rotating shaft, and a plain bearing. An anti-tilt section can be formed on the inner circumferential surface of the plain bearing to prevent contact with the rotating shaft. Accordingly, the outer diameter of the rotating shaft is enlarged to match the outer diameter of the plain bearing, thus reducing the surface pressure between the rotating shaft and the stationary scroll while maintaining the compression length. Furthermore, tilting of the plain bearing along with the rotating shaft can be prevented, thereby reducing the frictional loss between the plain bearing and the stationary scroll.

This invention relates to the technical field of wind power generation, and proposes a method, system, and device for automatically adjusting the weight of wind turbine blades. The method includes acquiring wind speed data v and blade size data; confirming the total vibration damping loss of the blade; confirming the total friction loss of the hub bearing; confirming the total power loss of the system; solving for the optimal value of the total power loss; calculating the first-order partial derivative of the total power loss of the system with respect to the mass of a single counterweight; setting the partial derivative to 0 to solve for the optimal counterweight mass of the i-th cavity; controlling the corresponding solenoid valve of each cavity to inject the target amount of liquid into each cavity. This invention calculates the optimal counterweight of the cavity in real time, enabling on-demand liquid injection and discharge, avoiding the problems of vibration and instability caused by light blades at high wind speeds, and the problem of blades not fully utilizing wind energy and reducing power generation due to heavy blades at low wind speeds.

The utility model discloses a kind of high-speed train bogie axle box with self-lubricating function, including the split type axle box structure being connected with bogie, the axle box structure is divided into upper box and lower box, bearing hole is provided in the center of upper box and lower box, positioning guide mechanism is provided between upper box and lower box, the positioning guide mechanism includes the first locating block being arranged at the top of lower box and the second locating block being arranged at the bottom of upper box, sealing structure is arranged on the contact surface of upper box and lower box, self-lubricating composite gasket and support rail abutment are integrated in the bottom of lower box, oblique spring seat is provided on the lower box, and multiple-stage air spring assembly and hydraulic damper are provided between spring seat and bogie.The utility model split type structure reduces train wheel set replacement time, self-lubricating gasket reduces the friction coefficient between support rail, improves service life, and obliquely arranged air spring dynamically adjusts axle box vertical and lateral stiffness, solves the problem of large friction loss and high maintenance cost of existing axle box.

The application provides an engine valve train detection method, a hydraulic tappet device and electronic equipment. The method comprises the following steps: collecting a first torque set of a flywheel end of an engine when a hydraulic tappet is installed in the valve train of the engine, wherein the first torque set comprises torques collected under multiple engine operating conditions; collecting a second torque set of the flywheel end of the engine when a hydraulic tappet device is installed in the valve train of the engine after the hydraulic tappet is removed, wherein the valve train of the engine stops running after the hydraulic tappet is removed, the hydraulic tappet device is used to block an oil passage hole of a cylinder head oil passage of the engine, and the second torque set comprises torques collected under multiple engine operating conditions; and obtaining a detection result representing friction loss of the valve train of the engine according to a difference between torques under the same engine operating condition in the first torque set and the second torque set. Thus, the problem that the friction loss of the valve train of an entity cannot be detected can be solved.

The invention relates to the technical field of pipeline repair, in particular to a drainage pipeline non-excavation repair optimization method based on hydraulic structure coupling simulation. Effective bearing wall thickness distribution description quantity and stress concentration coefficient distribution are introduced, modeling is conducted on the defect depth and defect length of the drainage pipeline in the axial direction, equivalent circumferential driving pressure is constructed by combining internal pressure, soil pressure, ground load and underground water pressure, and the thickness needing to be repaired is calculated point by point according to the axial position based on a judgment mechanism of the structural safety margin. According to the method, repair is in spatial self-adaptive distribution, the pertinence of structure safety is improved, on-way loss and local loss are calculated respectively in combination with the influence of repair thickness distribution on the inner diameter of the pipeline, and quantitative evaluation of the drainage capacity after repair is achieved; and through coupling optimization of structural safety constraint, hydraulic performance constraint and stability constraint, iterative adjustment of the repairing thickness is achieved.

This application discloses a suspended shaftless cooling fan, comprising: suspended blades, each including a suspension cylinder and blades; a fan frame, the fan frame having an annular groove, and a magnetic levitation positioning magnet assembly and a magnetic levitation drive assembly disposed between the annular groove and the outer wall of the suspension cylinder; the magnetic levitation drive assembly including a rotor magnet ring and an electromagnetic drive coil winding; the magnetic levitation positioning magnet assembly including a first positioning magnet, a second positioning magnet, a first positioning winding, and a second positioning winding. This application also discloses a control method. This invention belongs to the field of electrical engineering and heat dissipation equipment technology. Besides addressing the friction loss, efficiency reduction, heat generation, and wear problems caused by mechanical contact, it significantly improves the product's service life, operating efficiency, and reliability. By using multiple sets of distance sensors to monitor the rotor position in real time, it ensures that the fan always starts from the optimal position, avoiding vibration caused by eccentric starting.

The utility model discloses a kind of rolling low friction deflector, belong to prestressed variable angle tensioning device technical field, solve the problem that the friction between steel strand and deflector in existing deflector is sliding friction, friction resistance is big, leading to the problem of big friction loss. It includes at least one fan-shaped steel plate, at least one layer of guiding structure is arranged on the steel plate along its radial direction, each layer of guiding structure includes multiple rollers, multiple rollers corresponding to each layer of guiding structure are distributed in the circumferential arc line of steel plate, each roller is rotatably connected with the steel plate. The rolling low friction deflector of the utility model can greatly reduce the friction resistance of prestressed tensioning, reduce engineering cost.

The utility model discloses a kind of magnetic coupling adjustable speed propellers, belong to underwater navigation and electric propulsion technical field.The motor of the propeller, driving assembly and driven assembly are arranged in the inside of cabin, motor drive shaft is connected driving assembly, a plurality of first permanent magnets are arranged on driving assembly, a plurality of second permanent magnets are arranged on driven assembly, first permanent magnet and second permanent magnet magnetic force cooperation;Impeller is arranged outside cabin, impeller is connected with driven assembly;Magnetic controller includes disc and electromagnet, disc is rotatably connected with driving assembly, a plurality of electromagnets are detachably arranged on disc, electromagnet is arranged between first permanent magnet and second permanent magnet.The driving assembly of the propeller drives driven assembly to rotate, by changing the state of electromagnet, impeller can be speed-regulated, the propeller eliminates the friction loss in traditional mechanical transmission, so that the propeller has multi-mode speed-regulating function, can adapt to more application scenarios, improves transmission efficiency.

This application discloses a high-strength bearing support, relating to the technical field of bearing support. The application includes a sleeve containing a rotating shaft. A bearing ring is symmetrically rotated within the sleeve, and the rotating shaft is fitted inside the bearing ring. Cover plates are symmetrically arranged on both sides of the sleeve. Mounting plates are symmetrically fixed to the lower surface of the sleeve, and mounting grooves are symmetrically formed on the upper surface of the mounting plates. Limiting rings are symmetrically fixed within the sleeve. The rotating shaft is clamped between two limiting rings, and the bearing ring is located between the corresponding limiting ring and the cover plate. This high-strength bearing support provides a precise fit between the bearing ring and the rotating shaft. The limiting rings and chuck achieve bidirectional axial positioning, preventing axial movement and reducing friction loss. The spline groove and spline block meshing connection ensures gapless transmission between the rotating shaft and external components, avoiding torque transmission energy loss and effectively improving overall transmission efficiency.

The utility model relates to rainwater bucket technical field discloses a siphon rainwater bucket for roof drainage, including rainwater bucket body, connecting pipe and drain pipe, rainwater bucket body bottom is fixedly connected with the upper end of connecting pipe, and the lower extreme of connecting pipe is connected with the upper extreme of drain pipe, the siphon rainwater bucket for roof drainage is through the thread connection of thread groove one and thread groove two, realizes the quick disassembly of connecting pipe and drain pipe, can complete installation or maintenance without professional tool, improves construction efficiency greatly, the expansion ring in annular clamping slot is closely combined drain pipe wall, forms elastic seal, effectively prevents the leakage of connecting place, compares traditional sealing ring, and rubber expansion ring has elastic deformation capacity and reset performance, can adapt to the displacement caused by slight vibration or thermal expansion and contraction, improves sealing reliability, and the wear -resisting layer covers the outer wall of expansion ring, avoids the friction loss when thread connection, prolongs the service life of sealing part, reduces the leakage hidden danger due to abrasion.

The utility model belongs to the field of oil distribution sleeve, specifically relates to a gap sealed oil distribution sleeve, including oil distribution sleeve shell and bushing, bushing is supported by both sides' rolling bearing assembly in oil distribution sleeve shell, and the both ends of annular channel between oil distribution sleeve shell and bushing are equipped with sealing ring and end cover, copper base sealing sleeve is sleeved between both sides' rolling bearing on the bushing, and the clearance fit between copper base sealing sleeve and bushing, and the bushing can rotate freely in copper base sealing sleeve, copper base sealing sleeve is relatively fixed with oil distribution sleeve shell, and the oil distribution sleeve shell is installed with oil distribution block, and the oil outlet of oil distribution block is sequentially communicated with the oil hole on copper base sealing sleeve, the oil passing gap between copper base sealing sleeve and bushing, the oil channel on bushing and the shaft hole of bushing, the innovation combination of non - contact type sealing structure and copper base material has overcome the thermal failure and friction loss problem of traditional rubber sealing element significantly.

A scroll compressor is provided. The scroll compressor comprises a main frame provided between a first compression unit and a second compression unit, and the main frame may comprise at least one back pressure communication unit communicating between a first back pressure chamber and a second back pressure chamber. Accordingly, even if the back pressure of the first back pressure chamber and / or the second back pressure chamber rises above a set pressure when the compressor is started, the pressure in a back pressure chamber with a relatively high back pressure is transferred to a back pressure chamber with a relatively low back pressure, thereby enabling both back pressure chambers to quickly recover an appropriate level of back pressure while suppressing friction loss and dissipation in the compression unit, and at the same time suppressing leakage between compression chambers to increase compression efficiency.

The utility model provides a kind of finishing mill support roll locking device, including locking plate and two fixed blocks, fixed block is equipped with fixed through-hole, fixed block is fixed on the face of arch by connecting piece through fixed through-hole, the upper and lower sides of each fixed block are formed with guide slot, locking plate is recessed and formed with two sliding slots, and the upper and lower sides of each sliding slot in locking plate are formed with guide block, the middle part of locking plate is equipped with long hole, locking plate is connected on the face of arch by connecting piece through long hole, and the side of fixed block close to the face of arch is set out of locking plate. So push locking plate to act in fixed block guide slot, because the side of fixed block close to the face of arch is set out of locking plate, so that locking plate is not close to the face of arch, so that action is smooth, and there is no friction loss problem;And fixed block does not participate in action;The guide slot of fixed block also plays the role of guiding movement, can avoid the problem that locking plate is inclined and cannot be completely withdrawn.

The utility model discloses a cutting mechanism technical field's a cutting mechanism with multichannel cutting mechanism, including bottom plate and two support bars, two support bars are installed respectively in bottom plate upper end both sides, two support bars upper end are installed with cutting box body, four feed structures are distributed to cutting box body front end, four feed structures all include feed sleeve, fixed frame, fixed roll axle, first motor, fixed plate, two movable rods, moving frame, moving roll axle and adjusting screw rod, through the four independent feed structure of setting, realize four material synchronous feeding and cutting, and the production capacity is improved by times, satisfies the demand of mass production, adopts the combination of fixed roll axle and moving roll axle, realizes the stepless precision adjustment of roll axle gap, and is compatible with different diameter materials, and the design of internal thread fixed plate and bearing seat ensures that the adjustment process is smooth and stable, reduces friction loss, prolongs the life of parts.

The present application relates to screw heading machine technical field, especially a kind of screw heading machine's discharging device, including shell, the upper end of one side of the shell is horizontally provided with the positioning slot for screw heading, the inside of the positioning slot is provided with the discharging mechanism for controlling screw discharging, the bottom side of the positioning slot is provided with the oil injection mechanism for lubricating screw.By controlling the cylinder in discharging mechanism drive turntable cooperate elastic return piece, the stable ejection of ejector pin and automatic reset are realized, effectively complete the automatic discharging after screw heading;At the same time, oil injection mechanism can be linked, so that turntable rotation is synchronously completed quantitative oil injection, annular equidistant oil injection hole can be evenly lubricated to screw processing surface, reduce the friction loss of screw and positioning slot, effectively improve screw processing precision;Funnel-shaped limiting groove of collecting mechanism can gather and arrange falling screw, at the same time, reciprocating vibration driven by cylinder is avoided, and screw is accumulated and blocked.

The application discloses a kind of pure mechanical automatic transmission, including primary input shaft assembly, secondary shaft assembly and differential, the primary input shaft assembly is engaged with secondary shaft assembly and is connected, the secondary shaft assembly is engaged with differential and is connected, the primary input shaft assembly is used to realize the switching of gear, the secondary shaft assembly is used to realize high, low, reverse gear power transmission non-interference;It can be set to any (reasonable needs) vehicle speed upshift, any (reasonable needs) vehicle speed downshift;For variable speed system, it can realize active gear shifting;Long service life, not rely on centrifugal friction transmission torque, so there is no friction loss;Automatic transmission body overall structure is simple, compact, small in size;Will not be out of gear;Upshift state and design value of drop state are different, and repeated upshift and downshift situation will not appear;The clutch can realize high-torque transmission torque;Mainly replaceable electric control automatic gear shifting system.

The utility model belongs to the technical field of micro bearing, disclose a kind of high-precision micro bearing with good corrosion resistance and with dustproof function, including bearing outer ring, bearing inner ring, ball and retainer, ball is confined in the rolling cavity between bearing outer ring and bearing inner ring, retainer is equipped with two groups, two groups of retainer are mutually connected and symmetrically arranged, ball is located between two groups of retainers, bearing outer ring is connected with dust cover, dust cover is connected with labyrinth ring and convex ring one, labyrinth ring and convex ring one staggered arrangement, bearing inner ring is provided with recess, bearing inner ring is connected with convex ring two, convex ring two and recess staggered arrangement, convex ring two and convex ring one staggered arrangement, bearing outer ring is connected with oiling mechanism, and oiling mechanism is used to add lubricating oil.The utility model has multilayer labyrinth type sealing structure, prolongs the penetration path of dust and water vapor, realizes the efficient barrier to micron grade particles under the premise of not increasing friction loss.

The application discloses a high-precision torsion rope driving mechanism based on segmented retainer, which comprises a driving connecting frame and a free end joint, the inner side of the driving connecting frame is fixedly connected with a driving motor, elastic reset members are arranged in an array between the driving motor and the free end joint, retainers are arranged between every two elastic reset members, and a plurality of torsion ropes are further arranged between the driving motor and the free end joint, and the plurality of torsion ropes are radially isolated from each other through the retainers. The high-precision torsion rope driving mechanism based on segmented retainer radially isolates the plurality of torsion ropes through segmented retainers, avoids deformation of the torsion ropes caused by mutual extrusion, determines system transmission relationship by geometric structure, and improves the precision and stability problems caused by nonlinear coupling. Meanwhile, direct friction between the torsion ropes is changed into contact between the torsion ropes and the retainers, friction loss is reduced, and operation stability and service life of the mechanism are improved.

The embodiment of the application provides a multi-source error real-time separation and compensation method in torque measurement, relates to the technical field of mechanical measurement and precision instruments, and comprises the following steps: a multi-source error mathematical model is established, which comprises a temperature compensation submodel, a friction loss submodel, a nonlinear correction submodel and a misalignment correction submodel; temperature sensors, rotation speed sensors, acceleration sensors and torque sensors are arranged to obtain real-time measurement data; an adaptive Kalman filtering algorithm is used to perform online recursive estimation on error characteristic parameters, so that real-time separation of each error component is realized; and the original torque measurement value is compensated according to the separated error components and the correction result is output. The application has the effect of significantly improving the dynamic precision of torque measurement under variable working conditions.

This invention relates to a compact high-pressure oil pump drive component and a high-pressure oil pump. The pump body assembly provides support for the camshaft assembly via an interference-fitted bushing. The camshaft assembly includes a double thrust bushing and a slider assembly. An eccentric circle drives the slider to reciprocate, achieving the plunger's oil supply function. A sleeve is nested within the guide rod guide section, and its reciprocating motion is achieved through the elastic action of a limiting spring. The guide rod guide surface is coated and has lubrication spiral grooves to reduce friction loss and extend service life. The flange assembly has an internal bushing, and the lubrication oil circulation system is optimized through an oil cavity, eccentric groove, and connecting hole to ensure continuous lubrication of moving parts. The inner bore of the thrust bushing is interference-fitted with the camshaft support journal, and the shoulder surface is evenly distributed with oil grooves to form a dynamic lubrication film, limiting the camshaft axial movement to ≤0.5mm. The slider assembly has an internal bushing, which, together with the axial force of the plunger and sleeve, restricts slider rotation, improving motion stability.

The application discloses a kind of underwater impact test loading devices, including experimental pool, impact device and gravity potential energy conversion device;Experimental pool is used to provide underwater impact test environment;Impact device is set in the upper of experimental pool;Gravity potential energy conversion device is set in the side of experimental pool;Gravity potential energy conversion device converts gravity potential energy into traction, and gravity potential energy conversion device pulls impact device to impact test on the test piece of test piece tooling.The application efficiently transmits and converts the horizontal impact kinetic energy required by underwater impact body by energy conversion mechanism through vertical gravity power;At the same time, through the transmission path and the structure design of key components, the friction loss is reduced, the transmission stability and repeatability are improved, and the demand of precise controllable loading for underwater impact dynamics test of large water-related engineering structure is met.

The utility model relates to a kind of guiding buffer structure for reducing charging pole piece friction loss, especially in charging pile technical field.It mainly aims at the direct rigid contact of current charging pile metal pole piece and lifting robot end pole piece, prone to cause longitudinal scratch between metal pole piece due to robot positioning error, accelerate surface oxidation and wear;While oxidation layer increases contact resistance, and then causes charging failure, heating or even fire risk problem, the following technical scheme is proposed: including stabilizing block, the lower end middle part of stabilizing block is connected with up-down reset spring, the lower end of up-down reset spring is connected with mounting block, the lower end of mounting block is connected with shell.The utility model is through the unique guiding, buffering and automatic cleaning structure, realizes the accurate butt joint, stable connection and efficient self-cleaning of robot and charging pile end pole piece, with the significant advantages of high reliability, strong environmental adaptability and low maintenance cost.