17 results about "Axial Loadings" patented technology

This invention relates to the field of spacecraft attitude control technology, and more particularly to an ultra-precise and ultra-stable on-orbit adaptive control method and system for pointing under additional stiffness disturbances. This on-orbit adaptive control method, by applying specific excitations to actuators and measuring their responses, combined with a recursive filtering algorithm, can accurately identify the total actuator stiffness, including the additional stiffness of the cable, in real-time on-orbit, overcoming problems caused by differences in ground testing environments and time-varying stiffness. Based on the real-time identified stiffness values, the parameters of the axial compensation controller and the actuator compensation controller are dynamically adjusted, enabling the control system to adapt to changes in the additional stiffness of the cable and maintain excellent control performance at all times. By employing dual compensation control at the axial load level and the actuator level, additional stiffness disturbances are synergistically suppressed at both the overall system and local actuator levels, improving the comprehensiveness and accuracy of control, and achieving ultra-precise and ultra-stable on-orbit adaptive control for pointing under cable additional stiffness disturbances.

An extrusion assembly for a micro puree machine, the extrusion assembly including a bowl having a sidewall defining an interior volume, a plunger engageable with a driven shaft configured to axially move the plunger within the interior volume of the bowl, and a plunger drive inhibitor configured to restrict axial movement of the plunger within the interior volume of the bowl when a predetermined limit of force is reached or exceeded, the plunger drive inhibitor including a sensor configured to translate an applied axial load on the plunger into an electrical signal, wherein, upon axial movement of the driven shaft, the sensor is configured to measure a current corresponding to a force experienced by the plunger.

This invention discloses a method for calculating the critical preload margin of bolts under external loads. The method includes establishing a finite element model of an assembly connected by bolts and setting contact relationships and constraints; applying an external load to the finite element model and solving it to obtain the bolt working load; extracting the force values ​​in the x, y, and z directions at the contact position between the bolt head and the clamping element from the bolt working load; and calculating the shear load and axial load of the bolt working load using these force values; and calculating the critical preload margin required to ensure the clamping element does not separate using the shear load and axial load. This invention, through the contact settings used in finite element analysis, can obtain the actual working load borne by the bolt according to different external loads, and then evaluate the minimum bolt preload force required to prevent the clamping element from separating, i.e., the critical preload margin. This critical preload margin can then be used to guide bolt selection, safety assessment, and product optimization design.

The application discloses a kind of for magnesium alloy staged adjustable friction spot welding method, when the plate to be welded is carried out friction stir welding, its welding process parameters are: 1) insertion stage;2) main stirring stage: rotational speed is according to k2=(ω (t) 2 ‑ ω (t) 1) / (t ‑ t1) Linearly decreases, the amount of depression is Δh2, axial load F (t) 2 Constant;3) residence stage: rotational speed is according to k3=(ω (t) 3 ‑ ω (t) 2) / (t ‑ t2) Linearly decreases, axial load linearly rises;4) shrinkage densification stage: rotational speed is according to k4=(ω (t) 4 ‑ ω (t) 3) / (t ‑ t 3 ) Linearly decreases, shrinkage speed is v r The application is by the parameter such as welding step, stirring head rotational speed, axial load and welding time in the welding process Stage coordination and regulation, simultaneously in combination limit the highest temperature of key temperature control area, make weld nugget zone occur orderly plastic flow and controlled dynamic recrystallization in different welding stage, to realize the stable regulation and control of weld nugget zone structure and interface bonding state.

This invention relates to the field of stress monitoring technology for mining equipment, and discloses a method for measuring the three-dimensional stress on the connecting pin hole of a hydraulic support top beam and a shield beam. The method includes: the shield beam transferring the working load to the force axis of a three-dimensional pin sensor under load, forming a three-dimensional composite load; this load acts on the sensor, generating three-dimensional spatial deformation in the through-hole in the vertical direction, the through-hole in the horizontal direction, and the thin-walled region of the axial fixed shaft; strain gauges arranged in each region change resistance with the deformation, converting it into an analog resistance change signal; a Wheatstone bridge circuit receives this signal, utilizes the orthogonal deformation characteristics of the through-hole and the adjacent arm connection logic of the full bridge to eliminate cross-interference errors, and outputs a decoupled bridge voltage signal; this signal is substituted into the stress calculation logic to calculate and output the separated radial load in the vertical direction, the radial load in the horizontal direction, and the axial load components. This invention ensures the structural strength of the pin and achieves accurate decoupling and independent measurement of multi-component loads.

This invention discloses a method for strength verification of a propellant loading fixture for energetic materials, comprising: identifying the weak components of the propellant loading fixture for strength verification, wherein the weak components are the pressure bar and the upper pressure block; the strength verification includes verifying the crush strength and stability of the pressure bar, quantitatively evaluating the stress distribution of the pressure bar and the upper pressure block under axial load, examining the mechanical behavior at the contact point between the pressure bar and the upper pressure block, and determining the strength from a numerical simulation perspective; using an analysis method combining theoretical calculation and finite element simulation, the strength verification and validation of the pressure bar and the upper pressure block of the dedicated propellant loading fixture are completed. This method can confirm that the stress and deformation of the propellant loading fixture are within the elastic range, and the structural integrity meets the requirements.

This utility model discloses a three-point contact ball bearing for aero-engines, comprising an outer ring, two inner rings, a cage, and rolling elements. The outer ring and the two inner rings are provided with corresponding grooves forming raceways. The rolling elements are disposed in the cage and assembled within the raceways, with the rolling elements and raceways making three-point contact. Floating support rings are provided on the outer walls of the two inner rings near their corresponding grooves. When the inner rings rotate, the floating support rings undergo radial micro-movement under centrifugal force, supporting the rolling elements. This utility model, by setting floating support rings on the outside of the inner rings, converts the rotational motion of the bearing into the radial motion of the floating support rings when the inner rings rotate, further supporting and positioning the rolling elements, ensuring that the rolling elements are centered in the raceways, further enhancing the bearing's radial and axial load-bearing capacity, and improving its service life.

The application belongs to the technical field of material mechanical property testing and nondestructive testing, and specifically discloses a uniaxial compression ultrasonic stress testing method and device, which comprises the following steps: placing a sample to be tested in a loading device, applying a preload to the sample to be tested and unloading to a zero stress state, collecting the longitudinal wave propagation time, the transverse wave propagation time and the initial length of the sample to be tested in the zero stress state; applying a uniaxial compression load to the sample to be tested, and synchronously collecting the axial load, the piston displacement, the longitudinal wave propagation time and the transverse wave propagation time; calculating the relative change rate of the ultrasonic wave velocity, establishing a coupling relationship model between the uniaxial compression stress and the relative change rate of the ultrasonic wave velocity; and decoupling and inverting the actual stress inside the sample to be tested according to the coupling relationship model. The application solves the problem that the prior art does not fully consider the coupling influence of the microstructure change of the material on the ultrasonic wave signal in the compression process, thereby leading to insufficient precision of the stress inversion model.

The utility model relates to motor technical field, concretely relates to a three bearing motor of improving cantilever beam structure rigidity, including front end cover, the one end fixed mounting of front end cover has front bearing, the inside of front bearing is penetrated with the rotating shaft, the last end fixed connection of rotating shaft has rotor casing, the outside of front end cover is provided with stator assembly, the inside fixed mounting of rotor casing has the rotor assembly corresponding with stator assembly, the outside and the last end of rotating shaft are respectively covered with rear bearing no.1 and rear bearing no.2. The interaction of the rotating magnetic field generated by stator assembly and rotor assembly will convert electromagnetic energy into mechanical energy, drive the rotation of rotor casing and the rotating shaft fixed therewith, when the rotating shaft rotates, due to the front bearing in the front end cover, and rear bearing no.1, rear bearing no.2, support through three bearings, the axial load and radial load that the whole machine can bear increase, improve the motor structure rigidity intensity, reduce the front bearing close to cantilever end, it is easy to appear fatigue wear, overheating and other problems.

The application provides a ship equipment maintenance data dynamic analysis and early warning method, and relates to the technical field of data processing.The method comprises the following steps: step 1, processing the multi-dimensional running state time series data of the ship equipment, constructing a unified time series data set, and extracting a health feature vector reflecting the mechanical performance and overall running state of the equipment; for the key rod structure in the equipment, based on the real-time monitored axial load data and the geometric parameters of the rod, the axial stress is calculated, and combined with the allowable stress of the material, the axial tension and compression strength safety factor is obtained by comparison, and the health feature vector is formed. The application realizes the early identification and intelligent early warning of faults and hidden dangers, improves the maintenance efficiency and guarantees the safety of ship operation.

This invention relates to a testing apparatus for the sealing performance and frictional force of a secondary seal, comprising a sealing performance device, a load application device, and a media supply system. The sealing performance device is used to install the secondary seal and, in conjunction with the media supply system, performs room temperature airtightness and cryogenic liquid tightness tests on the secondary seal. The load application device, assisted by the media supply system, applies tensile / compressive axial loads to the sealing performance device and measures the frictional force of the secondary seal within the sealing performance device. When performing room temperature airtightness or cryogenic liquid tightness tests on the secondary seal, the media supply system provides room temperature air or cryogenic liquid nitrogen to the sealing performance device; when performing frictional force tests on the secondary seal, it supplies gas to the load application device. This invention also relates to a testing method for the sealing performance and frictional force of the secondary seal. This invention can obtain accurate leakage rates and simultaneously acquire the frictional force of the secondary seal to accurately assess the operating opening pressure of a detachable seal.

The application provides a pipe test fixture, which comprises a first clamping assembly and a second clamping assembly; the first clamping assembly comprises a first connecting rod and a first clamping seat; the first clamping seat is hinged and lockable with the first connecting rod and is used for clamping and fixing a first end; the second clamping assembly comprises a second connecting rod, a second clamping seat and a preloading seat; the preloading seat is hinged and lockable with the second connecting rod; the second clamping seat is slidingly connected and lockable with the preloading seat; the second clamping seat is used for abutting against a second end and limiting the radial displacement of the second end along the tubular workpiece. The pipe test fixture provided by the application can be used for verifying the structural reliability test of the tubular workpiece under axial load and / or radial load; when the first clamping seat is locked with the first connecting rod and the preloading seat is locked with the second connecting rod, the radial preloading of the tubular workpiece can be realized; when the first clamping seat is hinged with the first connecting rod and the preloading seat is hinged with the second connecting rod, the perpendicularity error of the central axis of the tubular workpiece can be compensated.

The application provides a production pipe string safety evaluation method, device, equipment and medium, and the method comprises the following steps: dividing a production pipe string located in a stratum into a plurality of units, establishing a three-dimensional production pipe string stratum physical model, and establishing a three-dimensional production pipe string stratum temperature mathematical model based on the three-dimensional production pipe string stratum physical model; establishing a wellbore trajectory geometric description model based on measured wellbore trajectory data, and establishing an axial load mathematical model considering the self-weight of the production pipe string and the pressure of internal and external fluids through the wellbore trajectory geometric description model; establishing a reservoir reconstruction load change mathematical model based on a temperature effect theory; correcting a production pipe string strength safety coefficient according to the three-dimensional production pipe string stratum temperature mathematical model, the axial load mathematical model and the reservoir reconstruction load change mathematical model, and performing production pipe string safety evaluation according to the production pipe string strength safety coefficient. The temperature change and the temperature additional load borne by the production pipe string can be more accurately calculated.

The application discloses a force loading device and a ship testing device. The force loading device comprises a shell, an output shaft, a piston assembly and a hydraulic assembly. The piston assembly comprises a first piston assembly and a second piston assembly. The hydraulic assembly delivers oil to the first piston assembly through a first liquid port and applies a first force to a thrust part in a direction parallel to the axial direction of the output shaft, or the hydraulic assembly delivers oil to the second piston assembly through a second liquid port and applies a second force to the thrust part in a direction opposite to that of the first force. Thus, the first force can be applied to the bearing output shaft of the thrust bearing through the piston rod of the first piston assembly or the second force can be applied to the bearing output shaft of the thrust bearing through the piston rod of the second piston assembly according to requirements, and the thrust bearing can be tested more comprehensively. The ship testing device can apply axial load, radial load and torque to the thrust bearing to test the thrust bearing.

The utility model provides a bearing detection device, including bearing body still include: base, be provided with axial detection spare on the base, just the detection station is opened in linear array on the base, transmission unit, transmission unit sets up on the base, transmission unit includes rotation cylinder, detection unit, detection unit sets up on the detection station, detection unit includes detection block and sets up the clamping piece on detection block. The utility model provides bearing detection device, will multiple bearing body respectively fixed to the detection block in detection unit on, and through clamping piece fixes, uses axial detection spare and radial detection spare respectively to bearing radial load and axial load's test to this simultaneous test multiple bearing body, improves the detection efficiency, and records the detection value and compares, to this improves the accuracy of detection data.

An extrusion assembly for a micro puree machine, the extrusion assembly including a bowl having a sidewall defining an interior volume, a plunger engageable with a driven shaft configured to axially move the plunger within the interior volume of the bowl, and a plunger drive inhibitor configured to restrict axial movement of the plunger within the interior volume of the bowl when a predetermined limit of force is reached or exceeded, the plunger drive inhibitor including a sensor configured to translate an applied axial load on the plunger into an electrical signal, wherein, upon axial movement of the driven shaft, the sensor is configured to measure a current corresponding to a force experienced by the plunger.

Production method of a drive for a concrete mixer vehicle comprising an output bearing for an output pinion of the drive, in which the output pinion is provided with a circular plate for putting in rotation a drum of the concrete mixer vehicle, the output bearing being orientable and comprising an internal ring and an external ring placed coaxially with interposition of first sliding rollers and second sliding rollers, the method comprising axial blocking phases of the output bearing for reduction of the wearing of the output bearing.