363 results about "Resistance force" patented technology

The invention provides a drilling control method and system for a self-propelled complex drill bit, and the method comprises the steps: setting a rated cutting torque through obtaining roadbed soil, hydraulic power and geometric parameters, calculating the total propulsion resistance based on the roadbed strength to control the axial jacking force, and carrying out the safety verification of the drag force; calculating a critical flow velocity according to the characteristics of the drilling slag to adjust the discharge capacity and negative pressure of the slurry pump so as to determine an operation boundary; drilling and deslagging are cooperatively executed under the boundary, and the trajectory is corrected by combining a PID algorithm and the propulsion speed is optimized based on the theoretical mechanical drilling speed. According to the method, the technical problems that existing trenchless construction depends on experience to set parameters, scientific quantitative calculation of the slag discharge flow speed and the safety drag force is lacked, and then pipe cable blockage and drainage pipe damage are caused can be solved, and full-system cooperative efficient control of drilling, propelling, slag discharge and guiding based on multi-field coupling calculation is achieved.

The invention discloses a resistance coefficient calculation method and device of a porous medium, the medium and equipment. The method comprises the steps that a three-dimensional geometric model of target equipment is constructed, a simulation area of the porous medium in the three-dimensional geometric model is determined, a simulation experiment is conducted on the target equipment, and an inlet and outlet experiment pressure difference is obtained; constructing an optimization model based on an inlet and outlet experiment pressure difference and an inlet and outlet simulation pressure difference, wherein the inlet and outlet simulation pressure difference is obtained by performing fluid simulation calculation on a three-dimensional geometric model based on a CFD control equation, a continuity equation, a CFD momentum conservation equation, a viscous resistance coefficient and an inertial resistance coefficient of a simulation area; taking the optimization model as a target function in a population algorithm, wherein position variables corresponding to individuals in the population algorithm are a multidirectional viscous resistance coefficient and a multidirectional inertial resistance coefficient; and solving the optimization model based on a population algorithm to obtain an optimal viscous resistance coefficient and an optimal inertial resistance coefficient. The identification accuracy of the inertial resistance coefficient and the viscous resistance coefficient is improved.

The invention relates to the technical field of steel wire rope detection, and discloses an elevator steel wire rope tensile strength detection device and method.The elevator steel wire rope tensile strength detection device comprises a machine base, a detection frame arranged on the machine base, a control case and a lifting assembly arranged on the detection frame; the lifting assembly comprises a lifting seat, and clamping assemblies for clamping and fixing the steel wire rope are arranged on the upper side of the lifting seat and the detection frame. According to the elevator steel wire rope tensile strength detection device, through the cooperation between the protection assembly and the buffer assembly, damping liquid in the buffer part is extruded by the buffer plate and flows through the through holes, the viscous resistance of the damping liquid is used for attenuating the kinetic energy of a moving machine, and the effect of buffering force unloading is achieved; the flow rate of the damping liquid can be further slowed down through the retention hole in the through hole, the buffering and damping effect is enhanced, the counter-acting force generated when the steel wire rope is broken can be effectively attenuated through the arrangement, and the mechanical structure of the detection equipment is protected against damage.

The stretching linkage equipment comprises a traction machine and the tension machine, the traction machine comprises a traction machine frame, a traction winding drum and a guide mechanism, the traction winding drum is installed on the traction machine frame, and the guide mechanism is arranged on the traction machine frame; the tension machine comprises a tension machine frame, an output shaft and a tension winding drum, the tension winding drum is rotationally arranged on the tension machine frame, and the output shaft is fixedly connected to the tension winding drum; a hydraulic resistance braking mechanism is fixedly arranged on the tension rack, and the hydraulic resistance braking mechanism is arranged on the output shaft in a sleeving manner; the tension machine further comprises a gear motor, and the gear motor is arranged on the tension machine frame. The hydraulic resistance braking mechanism comprises a liquid disc, a closed liquid cavity filled with magnetorheological fluid is arranged in the liquid disc, a resistance wheel set is arranged in the liquid cavity, and the resistance wheel set comprises a rotatable resistance blade and a motor; and a magnetic field regulation and control mechanism is arranged outside the liquid disc. The technical problem that hydraulic braking of existing stretching equipment fails is solved by integrating the hydraulic resistance braking mechanism and the magnetic domain regulation and control mechanism through the tensioner.

The utility model discloses a resistance output module and fitness equipment, and the resistance output module comprises a rack; the load assembly is connected to the rack, and the load assembly comprises a load motor and a transmission chain; the output assembly is connected to the rack, the output assembly comprises a connecting part, a connecting rope and a stretching part which are connected in sequence, and the connecting part is fixed to one side of the transmission chain; wherein the load motor can output load force, the stretching part is suitable for moving outwards so as to drive the load motor to rotate through the transmission chain, and the load motor is in transmission connection with the transmission chain and used for driving the transmission chain to reset. The output assembly is fixed to the transmission chain, so that a player can directly pull the stretching component to train, the structure of a transmission system is greatly simplified, use of complex components such as a traditional speed reducer and a traditional differential mechanism is reduced, and the problem that a traditional rope is prone to being folded and wound when being repeatedly wound and released on a winding wheel is thoroughly solved; and smoothness and stability of power output are ensured.

A resistance pulley structure includes a symmetrical stay cord assembly, a transmission assembly, a resistance assembly and driving parts. The stay cord assembly includes a stay cord, a first and a second fixed pulley block and a movable pulley block. The movable pulley block includes a left and right movable pulleys, and the second fixed pulley block includes a second left fixed pulley and a second right fixed pulley. The rotation direction of the second fixed pulley block is parallel to the rotation direction of the first fixed pulley. After the stay cord bypasses the first fixed pulley, two ends bypass the left and right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, and connected to the driving parts.

The utility model discloses a four-force-arm multi-track strength training device which comprises a machine frame. The four adjusting assemblies are located on the same side of the rack and arranged on the periphery of the rack, each adjusting assembly comprises an adjusting base and an output rod, the adjusting bases are rotationally connected to the rack in the horizontal direction, and the output rods are rotationally connected to the adjusting bases in the vertical direction; the four stretching parts are connected with the adjusting assemblies in a one-to-one correspondence mode, each stretching part comprises a pulling block, the pulling blocks are connected to the outer side of the output rod, and the pulling blocks are suitable for being pulled outwards; and the resistance output module is connected to the rack, and the resistance output module is used for outputting load force to the pulling block. Two additional force arms and a flexible multi-angle adjusting mechanism are added, the types of training actions are greatly enriched, the adaptability and expansibility of the equipment are improved, a user can do diversified and personalized exercise according to different muscle groups, operation is easy, convenient and visual, the equipment is suitable for people of various body types and training levels, and the practicability is high. And the fitness experience and the training effect are obviously enhanced.

A resistance mechanism is adapted to be installed between a winding shaft and a fixed seat of a cordless roller blind, and includes a housing and a resistance module. The housing includes a tubular wall that is hollow and that surrounds an axis which extends in a left-right direction, and an end wall that is connected to one end of the tubular wall. An inner circumferential surface of the tubular wall is provided with a teeth structure that surrounds the axis. The resistance module includes a shaft that extends along the axis through the end wall and that is surrounded by the tubular wall, and a plurality of gears each of which is mounted to the shaft and rotatable relative to the shaft about a rotation axis extending in the left-right direction. The gears are spaced apart along a periphery of the shaft and mesh with the teeth structure.

The application relates to the technical field of bridge vibration control, in particular to a bridge excitation and damping integrated device, a bridge and a laying method. The bridge excitation and damping integrated device comprises a mass block, a spring assembly, an actuator and two groups of lever assemblies. The middle part of the mass block is provided with a mounting hole, and a flywheel is arranged on the mass block. The spring assembly is arranged below the mass block and connected with the mass block, and the other end is connected with a structure to be damped. The actuator is arranged in the range of the mounting hole. The two groups of lever assemblies are respectively connected with the mass blocks on the two sides of the mounting hole through power arm ends, and the resistance arm ends are connected with the end parts of the telescopic rods of the actuator. When the telescopic rods of the actuator are telescopically extended or retracted, the mass blocks are driven to move up and down through the lever assemblies. The problem that the damping effect is only predicted through numerical simulation or simplified model test in the prior art and it is difficult to adjust parameters after installation can be solved. In addition, the nesting layout of the actuator and the mass block can reduce the requirement for the installation space by using the lever displacement amplification principle.

The utility model relates to flexible conveying pipe technical field, concretely for a kind of deviation rectifying device for flexible composite high-pressure conveying pipe production, including fixed frame, and the middle part is penetrated and is provided with circular slot, and the front of the fixed frame and located the outside fixed connection of circular slot has fixed ring, four clamping mechanisms are set on fixed ring with equal arc;Gear ring, its activity is set to the side of fixed frame away from fixed ring, driving mechanism is set between the gear ring and clamping mechanism. The utility model realizes the synchronous control of four clamping rollers by the accurate positioning meshing cooperation of gear one and gear ring, and the coaxial linkage design of gear two and gear three, effectively solve the problem that the pressure fluctuation in existing pneumatic system leads to inconsistent problem of resistance force.

The utility model provides a balancing block for reducing flow hysteresis resistance, a dynamic balance assembly and a compressor, the balancing block comprises a base and a counterweight part, the base comprises a first connecting part with a crankshaft hole in the middle and a second connecting part surrounding the first connecting part, the balance weight part extends outwards from the upper end face of the second connecting part in the axial direction of the crankshaft hole, the two ends of the balance weight part are a first windward face and a first leeward face respectively, the upper end face of the second connecting part serves as a first plane, and the horizontal projection of the balance weight part falls into the first plane. According to the balance block capable of reducing the flow hysteresis resistance, through cooperation of the base and the balance weight part, the area of the windward side can be effectively reduced, and then the generated flow hysteresis resistance is reduced. The balance block capable of reducing the flow hysteresis resistance is simple in overall structure, and the problem that in the prior art, when a balance block rotates, due to the fact that the large windward area is achieved, large flow hysteresis resistance is generated, and additional energy loss is generated in the movement of a compressor is solved.

The invention relates to the technical field of guide mechanisms, and discloses a translation mechanism which comprises two longitudinal rails parallel to each other and a tackle arranged between the two rails, and a longitudinal rolling groove is formed in the side, facing the tackle, of each rail; the pulley comprises a frame and two wheel sets arranged on the two sides of the frame respectively, the two wheel sets correspond to the two rolling grooves respectively, each wheel set comprises at least three wheels which are sequentially arranged in the longitudinal direction, the wheels are all rotationally connected with the frame, and the wheels are located in the corresponding rolling grooves respectively. When the pulley moves longitudinally, the wheels roll along the rolling grooves, and the rolling friction force is very small, so that the resistance is very small when the workbench moves, and the movement is more flexible. Even if dust enters the rolling groove, the wheel rolls in the rolling groove, so that abrasion to the edge of the wheel is very small and can be almost ignored, and the service life of the wheel is prolonged.

This utility model discloses a rotary damping dial, relating to the field of mechanical transmission and control. It includes an outer wheel, an inner wheel, and a damping mechanism. At least one damping mechanism is provided between the outer and inner wheels. The damping mechanism includes a set screw threaded onto the outer wheel, a spring at the tail end of the set screw, and a damping pin. By tightening or loosening the set screw, the spring is compressed or released, thereby adjusting the resistance of the damping pin on the inner wheel. The damping mechanism of this utility model consists of a set screw, a spring, and a damping pin. In use, by tightening or loosening the set screw, the spring force is changed, thereby adjusting the resistance of the damping pin on the inner wheel. The resistance between the damping pin and the inner wheel can be adjusted according to the usage scenario, allowing the same specification of damping dial to be used in different scenarios, thus improving the flexibility and practicality of the damping dial.

The present application relates to the field of stamping equipment, especially to a kind of stamping integrated equipment and method of energy storage steel row, including rack, the top of the rack is fixedly connected with workbench, the top of the workbench is installed with bottom plate, the top of the bottom plate is installed with lower die plate, the rear side of the workbench is installed with fixed frame, the front end of the fixed frame is fixedly connected with hydraulic cylinder in upper portion, the bottom of the hydraulic cylinder is fixedly connected with mounting plate in telescopic end, the bottom of the mounting plate is installed with upper die plate by bolt, the bottom of the upper die plate is all penetrated and slidably connected with guide pillar, the bottom end of the guide pillar is all fixedly connected with middle pressure plate, ultrasonic vibration head is arranged in bending stage, and high-frequency vibration is transmitted to bending plate by vibration piece and hydraulic medium, high-frequency dynamic stress disturbance is applied to material while the mechanical bending force acts, can promote material internal dislocation movement and plastic flow, reduce local deformation resistance, to effectively reduce bending forming force.

The utility model relates to the technical field of drawing reducing diameter device, especially to a kind of crude product welding wire welding wire drawing reducing diameter device, its improve the convenience of control adjustment to welding wire tension size, improve the flexibility of welding wire drawing force adjustment;Including base and recess, recess is set on the outside wall of base;Still include resistance device, conveying device, adjusting device, spool, fixed base, first tension wheel and second tension wheel, the both ends of spool are embedded in recess inside, resistance device is provided on base, resistance device is used to provide resistance for the rotation of spool, fixed base is set on the outside wall of base, a plurality of first tension wheels are rotatably installed on fixed base, a plurality of second tension wheels are rotatably set on fixed base by adjusting device moving up and down, conveying device is set on fixed base, and conveying device is used to draw and convey welding wire.

A square hole shaft comprises a large column in the middle and small columns arranged at the two ends of the large column in the length direction, and at least part of the end, close to the small columns, of the large column in the circumferential direction is contracted inwards to form a step structure; the utility model provides a handle lock rotating structure with a bearing and a pull rod and a handle lock. A first shifting piece and a second shifting piece are respectively sleeved at a step structure of a square hole shaft to form stable fixation; the two rotary bearings are arranged on the two small columns respectively in a sleeving mode, in the rotating process of the square hole shaft, the square hole shaft drives the inner rotating part to rotate, the outer fixing parts of the rotary bearings are fixed respectively and rotate, the rotary bearings support the square hole shaft, meanwhile, resistance in the rotating process is reduced, and operation resistance and noise are controlled. The spring provides resilience force for realizing the latch bolt, and the guide column provides sliding guide of the latch bolt and position limitation of the spring.

The application discloses a design method of an integrated mechanical model of a compression-resistant composite anti-floating anchor rod, and specifically comprises the following steps: obtaining a parameter set of a multi-layer structure of a target geotechnical engineering anti-floating anchor rod, analyzing the hierarchical interface mechanical behavior, generating an interface shear stress transfer function, embedding the function into an axisymmetric stress analysis framework, obtaining an axial force and a side resistance distribution function of the whole length of the anchor rod, constructing an integrated mechanical balance equation set, segmentally numerically solving the equation set, outputting mechanical response characteristic curves at different depths, and finally determining a limit anti-floating bearing capacity prediction value according to the curves as a design output.

The application discloses a resistance adjusting device for seated power training, which comprises a base installed above a weight disc, a force storage assembly, a clutch assembly and an adjusting assembly arranged on the base, the force storage assembly is provided with automatic locking and unlocking functions, stores force in a centripetal phase of the weight disc ascending, is unlocked when the weight disc reaches the highest point, and exerts pressure downward in a centrifugal phase to provide additional resistance, the clutch assembly is used for switching driving sources to drive the force storage assembly to reset or the adjusting assembly to select gears, the adjusting assembly comprises a rotating disc and a plurality of force storage units, different force storage springs are selected by rotating the rotating disc to coarsely adjust resistance, and the pre-compression amount of the spring is changed by an adjusting screw rod to finely adjust the resistance, the application solves the problems of inconvenience in centrifugal resistance adjustment of traditional equipment and incapability of automatic exertion, realizes automation, precision and safety of centrifugal overload training, and is compact in structure and convenient to adjust.

The application discloses a kind of friction support friction resistance determination method and determination device, it is related to structure boundary nonlinear analysis technical field, the method includes: obtaining support maximum friction resistance and support sliding speed in set time period;Based on support maximum friction resistance, according to the relationship between friction support friction resistance and support sliding speed, establish the iteration model of friction support friction resistance that friction support friction resistance changes with support sliding speed;Based on the iteration model of friction support friction resistance, according to the change of support sliding speed in set time period, obtain the friction support friction resistance in set time period.Solved in the prior art, using WEN unit to establish first-order rigid ordinary differential equation to carry out numerical calculation, there is the problem that large calculation workload needs to be carried out step by step integration, when integration step is large, the fluctuation of friction resistance calculation result is big.

The utility model discloses a damping structure with adjustable damping force, which comprises a support frame, a rotating shaft rotatably mounted on the support frame, a rope wheel sleeved on the rotating shaft, a pull rope wound on the rope wheel, a friction wheel fixed on the rotating shaft and a friction component arranged on the support frame, the friction component comprises a left clamp body and a right clamp body, and the left clamp body and the right clamp body are pivotally connected through a pivot. The right clamp body is provided with a first clamping end and a first adjusting end, the left clamp body is provided with a second clamping end and a second adjusting end, the first clamping end is opposite to the second clamping end, contact portions are arranged on the inner sides of the first clamping end and the second clamping end, a clamping opening for a friction wheel to be inserted is formed between the two contact portions, and the first adjusting end is opposite to the second adjusting end. The first adjusting end is connected with an adjusting screw rod, the adjusting screw rod penetrates through a through hole in the second adjusting end to be in threaded connection with an adjusting nut, the width of the clamping opening is changed by screwing the adjusting nut along the adjusting screw rod, and therefore the effect of changing rotation resistance is achieved, and different exercise requirements are met.

This invention provides a coaxial, low-noise, smooth, slow-rebound torsion spring hinge. It utilizes the release of elastic force after the torsion spring is twisted to achieve automatic rebound during hinge closure, while simultaneously using the resistance of a hydraulic damper to reduce the impact force during hinge closure. In particular, the structure of the buffer component that works in conjunction with the hydraulic damper has been improved, featuring a spiral slide and ball bearings to enable the buffer component to function with extremely low friction, eliminating frictional noise at the mating surfaces of the buffer component, and resulting in better smoothness during hinge rotation.

A rowing machine (10) comprising: a frame (20) having a first end (21) and a second end (22) defining a frame axis; a seat (25) slidably mounted to the frame (20), the seat (25) being configured to slide along the frame axis; at least one oarlock (30), 5 wherein the or each oarlock (30) is configured to receive an oar (40) such that the oar (40) can rotate in the oarlock (30); and a resistance mechanism (50) configured to provide resistance to the oar (40).

The invention belongs to the technical field of cast-in-place pile construction, and particularly relates to a full-casing rotary excavating cast-in-place concrete pile reinforcement cage anti-pulling device and method.The device comprises a reinforcement cage, the reinforcement cage comprises main reinforcements, stirrups and reinforcing hoops, the device further comprises an anti-pulling steel plate, and the anti-pulling steel plate is arranged at the bottom of the reinforcement cage and welded to the reinforcement cage; the surface of the anti-pulling steel plate is parallel to the horizontal plane; the method is characterized in that the area of the anti-pulling steel plate is determined; compared with the prior art, the end resistance can be applied to the reinforcement cage, and the error-tolerant rate of the whole pile casing in the pulling state under the adverse working condition is increased through pressure. By analyzing the stress of the reinforcement cage, the method for calculating the size of the required steel plate is invented, and the problem of the size of the required steel plate under the condition of different hole depths is solved.

The application provides a steering control method and device when automatic driving is taken over, and relates to the technical field of automatic driving. The method comprises the following steps: acquiring a steering force applied on a steering column by a steering machine when a driver takes over; and controlling a power-assisted system to apply a resistance force decreasing over time on the steering machine, so that the steering machine releases the steering force under the action of the resistance force. The application avoids the problem of poor vehicle lateral stability caused by the sudden release of the steering force by the steering machine.

Provided is an operation controller that accepts the bending operation of a bending part by a medical manipulator, the operation controller comprising: an interface to which the bending operation is inputted and which can detect the operation amount of the bending operation; and a resistance mechanism which is arranged inside of the interface and which generates, for the interface, a resistance force that changes in accordance with the operation amount. The interface can detect the operation amount applied to the bending part in two or more bending directions, and the resistance mechanism generates the resistance force from a change amount according to the maximum bending amounts in the two or more bending directions.

Systems and methods are disclosed for testing the torque response of damping materials. The system and method include a rotatable arrangement of nested components with damping material disposed therebetween. In other words, a first component is rotatably arranged with a second component for rotation of the first component for a predetermined rotation angle and / or time and / or at a predetermined speed for measurement of a torque response, or resistive torque, during position movement of the first component.

This invention provides a vane pump that can reduce the sliding resistance of the rotor by ensuring a gap between the side plate and the rotor. [Solution] The vane pump 100 according to the present invention comprises a rotor 102 rotatable around an axis 110, a plurality of vane grooves 108 formed radially on the outer circumferential surface of the rotor, a plurality of vanes 106 fitted into the plurality of vane grooves and slidably protruding from the rotating rotor, two side plates 114, 116 arranged on both sides of the rotor and facing the side surface of the rotor, and back pressure grooves 132, 134, 142, 144 formed on the side plates, which are able to communicate with the axis side of the vane grooves of the rotor and through which discharge pressure is guided, and the two side plates have continuous annular protrusions 152, 154 formed on the sliding surfaces 122, 146 facing the rotor and located axis side of the back pressure grooves.

A hand grip strengthener includes a first operation handle having a first handle body, a second operation handle which is movably coupled to the first operation handle and has a second handle body, wherein the first handle body and the second handle body are injection molded, a strength adjustment assembly is arranged to generate a resistance force to a relative movement between the first operation handle and the second operation handle.

The invention discloses a method for calculating TBM jacking force of different subareas of soft and hard tunneling sections. The method comprises the following steps: 1, calculating propelling frictional resistance of a cutterhead panel and a rock mass; 2, calculating the frictional resistance between the shell of the body and the surrounding rock mass; 3, calculating the propelling resistance of the cutter under the composite stratum condition; 4, calculating the pressure of a soil bin at an opening of a cutter head, the resistance of a traction trailer and the frictional resistance between a duct piece and a shield tail; and 5, calculating the TBM jacking force of different subareas of the soft and hard tunneling sections. According to the method, the tunneling section proportion is dynamically divided based on the soft and hard boundary angles, multi-source mechanical parameters are integrated, jacking force distribution of different partitions is calculated, the problem that traditional tunneling parameters of the TBM are insufficient in adaptability in the composite stratum is effectively solved, and reliable technical guarantee is provided for high-quality construction of tunnel engineering.