226 results about "Axial thrust" patented technology

The invention discloses an automatic assembling mechanism for railway track fastener nuts, and belongs to the technical field of automatic assembling equipment. The mechanism comprises a mechanical arm, a nut assembling mechanism, a power transmission device, a propelling device, a connecting seat and a visual device, the nut assembling mechanism is composed of a compliant device and a magnetic attraction device, the tail end of a mechanical arm is fixed through a connecting base, a visual device recognizes the position of a fastener in real time and guides the mechanical arm to be positioned, a servo motor transmits torque through a speed reducer and a telescopic universal connecting assembly, nut screwing is achieved, and the compliant device absorbs assembling errors and adapts to the posture. The magnetic attraction device is used for adsorbing and fixing the nut; the six-dimensional force sensor is used for monitoring and feeding back torque in real time; the control system is used for adjusting pre-tightening force; the propelling device is used for applying axial thrust; the device can realize automatic identification, positioning, tightening and pre-tightening control of the nut, and is suitable for various sleeper structures and complex track working conditions.

The invention provides a precise air floating main shaft based on small hole throttling. The precise air floating main shaft comprises a cylinder barrel, a shell, a rotating shaft, a front radial air floating bearing, a rear radial air floating bearing, a front axial thrust air floating bearing, a rear axial thrust air floating bearing, a driving motor, a broach mechanism and various sensors. A reciprocating type spiral groove is formed in the outer circle of the cylinder barrel and forms a spiral cooling water channel with the shell, and the rear end cover is integrated with an air inlet interface, an air outlet interface, a cooling water interface and an air control interface; compressed gas is throttled through an axial gas path and a small hole to form a high-rigidity gas film to support the rotating shaft, and cooling water flows in the spiral water path to take away heat; the control module is based on rotating speed, displacement, temperature and pressure signals, adopts a thermal-mechanical coupling model and a predictive control algorithm, adaptively adjusts air supply pressure and cooling water flow, and is suitable for semiconductors and ultra-precision machining equipment. Through the collaborative design of the small hole throttling air bearing, the reciprocating type spiral cooling water channel and multi-sensor intelligent control, the rigidity, the heat stability and the operation reliability of the main shaft are greatly improved, and the high-precision ultra-precision machining device is suitable for long-term high-rotating-speed and high-precision ultra-precision machining.

The invention provides a permanent magnet radial-axial collaborative balancing device and method for a shield pump, and belongs to the technical field of shield pumps. The device comprises a pump shell, an impeller, a rotor assembly, a stator assembly, a shaft, a thrust bearing, a rotor permanent magnet component and a static permanent magnet component, the rotor permanent magnet component and the static permanent magnet component correspond to each other, the rotor permanent magnet component is embedded below an impeller front cover plate opening ring, and the static permanent magnet component is embedded into the corresponding inner wall of the pump shell. The magnetization direction and the axis of the pump shaft form a preset inclination angle and are in mirror symmetry, so that a repulsive magnetic circuit with opposite same-name magnetic poles is formed; space magnetic force generated during working can be decomposed into radial and axial components. The radial component provides restoring force pointing to the center when the rotor deviates, and the radial stability is enhanced. The axial component counteracts the axial thrust of the fluid, and the thrust bearing load is reduced. External energy input is not needed, the structure is compact, vibration noise can be effectively restrained, and the service life of the bearing is prolonged.

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.

The invention relates to the technical field of oil and gas well completion tools, and discloses an anti-resistance open hole packer which comprises a central pipe and a rubber sleeve arranged outside the central pipe in a sleeving mode, and further comprises a double-piston setting mechanism arranged on the central pipe in a sleeving mode and defining a pressure-bearing cavity, one end of the double-piston setting mechanism abuts against the end of the rubber sleeve, and the other end of the double-piston setting mechanism abuts against the end of the rubber sleeve. Axial thrust is generated by receiving high-pressure liquid conducted in the center pipe, and the rubber barrel is extruded to deform in the radial direction and be attached to the open hole well wall. And the lower piston assembly is arranged in a pressure-bearing cavity between the central pipe and the double-piston setting mechanism, firstly moves in the direction far away from the rubber barrel under the action of high-pressure liquid, relieves the pre-locking state of the double-piston setting mechanism and then drives the double-piston setting mechanism to move in the direction of the rubber barrel. The open hole packer capable of preventing resistance encountering aims at solving the problems that a setting mechanism is started in advance and set accidentally due to resistance encountering in the process that an existing open hole packer goes into a well, and the existing open hole packer cannot reach a preset packing position accurately.

The invention relates to the technical field of suspension bridge cable clamp detection, and particularly discloses a cable clamp anti-sliding performance detection method based on multi-point stress-strain monitoring, and the method comprises the steps: simulating a main cable through a full-scale sample, installing a test cable clamp and a brake cable clamp, and applying an axial thrust through a jack. A strain gauge, an axial force meter and a displacement meter are arranged on a cable clamp and a bolt, graded loading is carried out to obtain a bolt pre-tightening force attenuation curve and a slippage critical load, and therefore the friction coefficient mu is calculated. And establishing a main cable-cable clamp three-dimensional contact finite element model, and inputting mu and pre-tightening force attenuation data measured by the test to carry out simulation calibration, so that a simulation result is consistent with that of the test. And finally, a bolt is fastened to a design value in the calibrated model, and vertical sling force is applied to the sling clamp lug plate until the sling clamp lug plate slides, so that the maximum anti-sliding force of the sling clamp is obtained. The objective of the invention is to solve the problems that an existing cable clamp anti-sliding performance testing method excessively depends on a finished bridge main cable, the cost is high, the period is long, and matching verification cannot be carried out in the early stage of a project.

This invention discloses a blind-mating reset fluid connector, comprising: a housing mounted on a first object; an axial elastic element and a guide limiting element provided between a sleeve and the housing; one end of a pipe connected to the first object, and the other end of the pipe detachably connected to a connector, the portion of the pipe being located within the sleeve, and a radial elastic element provided between the pipe and the sleeve; a guide seat movably sleeved on the pipe, and a force transmission element provided between the guide seat and the sleeve, and a guide assembly provided on the guide seat; this invention provides a blind-mating reset fluid connector that, through the force transmission element, allows the guide seat and the sleeve to transmit axial thrust without contact, avoiding interference between the radial and axial floating components of the fluid connector.

The application discloses a modularized screw conveyor for adjustable feed processing, and belongs to the technical field of agricultural and sideline product processing and conveying mechanical equipment, comprising a plurality of cylinder bodies, the plurality of cylinder bodies are expandable connected through supporting rings, and the cylinder bodies located at the sides are each provided with an end cover, one side of the end cover is connected with a rotary driving part, and at least two cylinder bodies are connected with pipelines. In the application, through the built-in limiting mechanism, a single limiting rod is pushed by the central telescopic driving part, the axial thrust is converted into radial movement through wedge surface cooperation, a plurality of clamping blocks are driven to be synchronously clamped into the clamping grooves of the screw conveying part, the quick assembly and disassembly and firm locking of the screw conveying part are realized, the first spring is matched to absorb the rotary torsion, and the wedge of the fixed block and the groove of the expanded shaft end is matched, so that the accuracy of torque transmission under long-distance expansion and the high stability of overall operation are ensured, and the strength requirement of continuous conveying of large quantities of agricultural and sideline products is met.

The invention discloses a vertical water turbine set and an axial thrust load shedding device for a vertical water turbine of the vertical water turbine set, and relates to the technical field of water turbines, and the axial thrust load shedding device for the vertical water turbine comprises an electromagnet arranged on the upper portion of a rack of the water turbine; the magnetizer is arranged on the upper portion of a thrust block of the water turbine, and a gap is reserved between the top of the magnetizer and the bottom of the electromagnet and is called an electromagnetic air gap; the electromagnet coil is arranged in the electromagnet; and the control device is connected with the electromagnet coil through a wire to control the current of the electromagnet coil, so that the electromagnet generates the required magnetic force, and the magnetic force is used for reducing the axial water thrust borne by the thrust pad of the water turbine. The device can effectively solve the problems of fatigue damage and the like of thrust bearing components (such as a thrust pad, an elastic oil tank and a runner plate) caused by temperature rise of the thrust pad and deterioration of lubricating conditions due to overlarge axial hydraulic thrust.

This invention discloses a dual-chamber, split-flow, step-by-step mechanical pipeline mixer and its control method. The mixer includes an upper mixing chamber and a lower mixing chamber separated by a water seal baffle. An axial thrust guide shroud is fixed on the water seal baffle. The outlet of the lower mixing chamber is connected to an outlet pipe. The upper mixing chamber is connected to an inlet pipe via a split pipe. A stirring device extending into the axial thrust guide shroud is installed on the upper mixing chamber. A first dosing device and a second dosing device are respectively installed at the split pipe and the axial thrust guide shroud. The lower mixing chamber is connected to the inlet pipe via a venturi tube. The cross-sectional area of ​​the venturi tube neck is 20-30% of the cross-sectional area of ​​the inlet pipe, and the cross-sectional area of ​​the venturi tube neck plus the cross-sectional area of ​​the split pipe is greater than or equal to the cross-sectional area of ​​the inlet pipe. The stirring device, the first dosing device, and the second dosing device are all electrically connected to the controller.

Torsional vibration damping device (1) with a primary mass (4) and a secondary mass (5) which is rotatable relative to the primary mass (4) against the action of at least one torsional vibration damping element (7) and by means of a bearing device (10) comprising an axial thrust washer (18), an axial friction ring (16) and a radial sliding bearing sleeve (14), wherein the axial thrust washer (18) is non-rotatably connected to the primary mass (4), wherein the axial thrust washer (18) has at least one radial projection (41-43) which is non-rotatably connected to the primary mass (4) and projects radially outwards, wherein the radial projection (41-43) engages with a drive element extending from a retaining element (25) which is attached to the primary mass (4).

The present disclosure relates to an adjustment mechanism for adjusting the torque of a torsion spring, a torsion spring assembly, a storage apparatus, and a vehicle. The adjustment mechanism comprises: an axial element which comprises a shaft portion and a flange portion; an adjustment disc sleeved on the shaft portion, the adjustment disc comprising an engagement surface, wherein a first support leg of the torsion spring is capable of engaging with the engagement surface, the engagement surface comprises a plurality of engagement portions, and when the first support leg of the torsion spring engages with a different engagement portion, the angle of the first support leg relative to a second support leg is different; and an elastic thrust element which presses the adjustment disc against the flange portion of the axial element from a distal side of the adjustment disc. The axial element is provided with a limiting element, and the adjustment disc is provided with a mating limiting element. The limiting element and the mating limiting element are capable of engaging with each other under the action of an axial thrust force of the elastic thrust element, so as to prevent rotation of the adjustment disc. Moreover, the limiting element and the mating limiting element are capable of resisting the axial thrust force of the elastic thrust element under the action of an external force to disengage from each other, so as to allow rotation of the adjustment disc.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The utility model relates to the technical field of modified plastic production, and discloses a premixing device for modified plastic raw materials, which comprises an equipment shell, and a mixing structure is arranged in the equipment shell. According to the premixing device for the modified plastic raw materials, the raw materials are fed in batches through the top feeding pipe, the mixing structure is started for low-speed premixing, raw material aggregates are broken through transverse pushing force of the first radial fan-shaped plate and the second fan-shaped plate, and transverse dispersion (such as uniform distribution of filler and resin) of components with different densities is achieved; the axial thrust of the first arc-shaped plate and the second arc-shaped plate drives the raw materials to push the materials to slide downwards to the surface of the vibration spiral plate, the ultrasonic generator is started, the ultrasonic generator vibrates the surface of the vibration spiral plate, the adhered raw materials are further stripped in combination with the low adhesion of the anti-adhesion coating, raw material aggregates can be broken through high-frequency vibration, and the anti-adhesion effect is good. Wall adhesion is reduced, vibration energy is transmitted to the raw materials through the anti-sticking coating, the interface resistance is reduced, and the mixing efficiency is improved.

The invention provides an automatic milling device for die steel, and belongs to the technical field of milling machines. Comprising a machine body, a vertical sliding table and an electric spindle fixed to the vertical sliding table, the interior of the electric spindle is rotationally connected with a shaft body through a bearing, a broach rod is arranged in the shaft body, a built-in motor driving the shaft body to rotate is arranged in the electric spindle, and one end of the shaft body is detachably connected with a cutter; a shaft hole is formed in the broach rod, a mounting cavity with a top opening is formed in the broach rod, and a flow guide part is arranged in the mounting cavity. The multiple heavy blocks can be driven by centrifugal force generated when the shaft body rotates at a high speed to swing outwards to rotate and are matched with the guide ring to form axial thrust acting on the broach rod, so that the broach rod further tensions the broach claw, extra dynamic clamping force can be provided in the rotating process of the main shaft, the clamping rigidity of a tool in the high-speed rotating state is improved, and the machining efficiency is improved. And the inhibition on the vibration condition of the cutter in the cutting process is improved, and the machining precision of the die steel can be improved.

The application discloses a kind of high heat-resistant wear-resistant conveying belt, comprising: base and conveying belt body, the top of the base is fixedly installed with driven support, the inner wall of the driven support is rotatably connected with driven roller;Roller cooling mechanism, the roller cooling mechanism is set in the top of base, the roller cooling mechanism is used to heat dissipation protection to conveying belt body.The overall design of roller cooling mechanism, in the process that driving roller rotates and drives conveying belt body to run, will drive speed increaser to work, speed increaser will drive connecting shaft to rotate quickly, in turn drive impeller to rotate in the inner cavity of cylinder and produce axial thrust, whereby thrust can absorb external cold air, then conveying to the inner cavity of support roller and flow, in the process of air flow, heat exchange with support roller, reduce the temperature of support roller, avoid heat to continue to gather on support roller and cause problem to conveying belt body.

This utility model provides a four-axis rotary drilling and milling fixture, comprising: a fixture base mounted on the chuck of a machine tool; multiple support blocks mounted on the fixture base for abutting against the end face of an end plate on one side of the workpiece; a positioning mechanism mounted on the fixture base for positioning the end plate on one side of the workpiece; multiple 90-degree rotation cylinders mounted on the fixture base for pressing the end plate on one side of the workpiece around its perimeter; a support seat mounted on the machine tool's worktable; a standard thrust cylinder mounted on the support seat for providing axial thrust; and a positioning push rod connected to the standard thrust cylinder for positioning and pressing the cylindrical section on the other side of the workpiece. This utility model can improve workpiece clamping efficiency and positioning accuracy, and reduce process difficulty.

The utility model relates to three screw rod pump technical field, concretely relates to three screw rod pump for conveying high temperature lubricating grease, including double -deck heat preservation pump body, shaft seal, screw rod to be used for double -deck heat preservation pump body's double -deck welding type heat preservation mechanism, be used for shaft seal's mechanical seal flushing mechanism, be used for screw rod's axial thrust mechanism. The three screw rod pump for conveying high temperature lubricating grease, through having the double -deck welding type with heat preservation function's double -deck heat preservation pump body design, make it in the conveying high temperature lubricating grease pumping process, realize high pressure material in low pressure chamber when in overpressure is introduced, through having the shaft seal design with mechanical seal flushing system, reliably realized the shaft seal problem of high temperature lubricating grease, through the combination use under double -deck welding type heat preservation mechanism, mechanical seal flushing mechanism, axial thrust mechanism, can completely realize the safe long -life pumping of high temperature lubricating grease, pulsation is low, no shear, and this method is simple, economic, continuous, is suitable for the conveying process of high temperature lubricating grease.

The utility model relates to a labor-saving type first installation structure of a valve actuator. The labor-saving type first installation structure comprises an actuator body. The actuator body comprises a base, a stroke column and a shell, and a first open ring is rotatably installed on the base and arranged on the stroke column in a sleeving mode. The rotation path of the first open ring is limited by the base, the first open ring plays a role in supporting the stroke column in the rotation process, and a jacking block used for supporting a protruding structure on the outer circle surface of the stroke column and a reset elastic piece used for abutting against the inner wall of the shell and pushing the first open ring to reset are formed on the first open ring. The first open ring is additionally arranged on the base, the stroke column is supported by the first open ring, and the axial thrust needing to be overcome by an operator during installation is remarkably weakened.

The application discloses an integrated joint quick buckling connection assembly method and system with improved efficiency, which comprises a support rack, wherein the support rack is a rectangular frame, a linear conveyor is arranged on the support rack, a pair of feeding structures is symmetrically arranged on the two sides of the linear conveyor, and a pair of buckling structures is arranged on the two sides of the linear conveyor and located downstream of the pair of feeding structures; the application relates to the technical field of integrated joint processing, and the integrated joint quick buckling connection assembly system and method can realize accurate matching between pipe clamp supply and workpiece conveying through mechanical hard synchronization, eliminate manual alignment deviation through a double-stage guide mechanism, convert axial thrust into uniform radial pressure through taper surface meshing design, ensure buckling quality consistency, reduce manual intervention through full-process automatic integration, greatly shorten the single-piece operation beat compared with the traditional method, and significantly improve production efficiency and product qualification rate.

The invention discloses an oil and gas well bottom electric high-speed booster pump permanent magnet bearing flexible combined support, which is applied to an electric high-speed booster pump for gas production of a natural gas well, adopts a non-contact checkerboard type permanent magnet dot matrix design, and takes the magnetic force action as positioning constraint. Comprising a radial magnetic suspension bearing unit, an axial magnetic suspension bearing unit and a flexible supporting unit. The radial magnetic levitation unit is composed of two sets of prestress dot-matrix type permanent magnet rings including an inner magnetic ring and an outer magnetic ring, and radial centering of the rotor shaft is achieved through reasonable distribution and combination of magnetic repulsive force and suction force. The axial magnetic levitation unit is composed of two sets of prestressed dot-matrix permanent magnet bearings and resists axial thrust generated by a gas compressor in a non-contact mode. The auxiliary supporting unit comprises a positioning bearing and a flexible floating point type supporting sleeve, centering and damping are provided during starting, stopping and low-speed operation, radial fluctuation can be effectively reduced, and stable starting and stable impeller tooth top clearance are ensured. And stable and reliable support of the motor in the whole stage from starting to high-speed operation is realized.

The application relates to the field of half shaft machining, in particular to an automobile half shaft grinding device which comprises a track assembly and a grinding assembly, a fixed headstock and a left and right sliding tailstock are arranged on the track assembly, a center mechanism for aligning and locking the end of the half shaft is arranged on the headstock and the tailstock, an auxiliary mechanism for supporting the area of the half shaft after polishing is further arranged on the track assembly, the positioning center, the limiting center and the abutting disc are arranged in a mutually nested sliding mode, the half shaft is sequentially positioned and limited, so that the double functions of high-precision positioning and bearing grinding load which are simultaneously borne by the traditional center are separated, meanwhile, the axial thrust and the radial load generated in the grinding process are borne by the abutting disc and the limiting center; the V-shaped block is further matched to support the area of the half shaft after grinding with high precision, so that stable positioning in the whole grinding process of the half shaft is realized, and long-time high-precision grinding operation can be carried out.

The application discloses a kind of no thrust disc permanent magnet bias axial magnetic suspension bearing, including stator ring core, control winding, first permanent magnet, second permanent magnet and rotor core;First permanent magnet and second permanent magnet are respectively fixed on the left and right side ring surface of stator ring core;Control winding is installed on the center ring hole of stator ring core;Rotor core transversely penetrates the center ring hole of stator ring core, and first air gap ring groove and second air gap ring groove are spaced apart on the outer wall in the middle of rotor core, to form first axial air gap and second axial air gap.The no thrust disc permanent magnet bias axial magnetic suspension bearing adopts the design of no thrust disc permanent magnet bias axial magnetic suspension bearing, compared with existing permanent magnet bias axial magnetic suspension bearing, there is no large-diameter axial thrust disc, the centrifugal force borne by rotor core is reduced, not easy to damage, improve the dynamics stability of rotor core, and then promote the upper limit of rotational speed.

The invention relates to the field of medical instruments, and particularly discloses a drug release capsule device based on an external rotating magnetic field, the drug release capsule device comprises a capsule shell, liquid medicine is stored in the capsule shell, drug release holes are formed in the side wall of the capsule shell, and a spiral strip is arranged on the outer side wall of the capsule shell; a medicine pushing rod is arranged in the capsule shell in a sliding mode, a check block is fixedly connected to the medicine pushing rod, and the check block slides along the inner side wall of the capsule shell and is used for shielding or opening the medicine release hole. A first magnet is rotationally arranged in the capsule shell and is driven by an external rotating magnetic field to rotate; the first magnet is coaxially and fixedly connected with a cylindrical cam, and the cylindrical cam is used for converting the rotating torque of the first magnet into axial thrust to push the medicine pushing rod; a spring is arranged in the capsule shell and used for applying elastic force opposite to the axial thrust direction to the medicine pushing rod; and a second magnet is fixedly arranged in the capsule shell and is used for keeping the capsule shell fixed under the action of an external static magnetic field. Non-contact magnetic driving is adopted, and fixed-point drug release and multi-time quantitative drug release can be achieved.

This invention relates to a multi-directional composite loading device for thin-walled casing components of aero-engines. It includes: a mounting structure comprising a rotatably mounted loading disk and a fixed disk coaxially mounted with the loading disk; and a loading structure comprising a torque loading component for applying torque to the thin-walled casing, a lateral loading component for applying lateral force to the thin-walled casing, and a bending moment loading component for applying bending moment to the thin-walled casing. This invention, by integrating the bending moment loading component, torque loading component, and lateral loading component, can simultaneously or separately apply bending moment, torque, and lateral force to thin-walled casing components, and can also combine axial thrust. This realistically simulates the stress state of a thin-walled casing of an aero-engine under multi-directional coupled loads such as bending, torsion, and lateral impact during actual service, providing more accurate experimental data for assessing the structural strength and fatigue life of the casing.

Described is a downhole system for use in a borehole comprising: one or more anchoring units operable to grip the borehole; one or more axial thrusting mechanisms operable to apply axial thrust; a directional drilling tool having a proximal end and a distal end, the directional drilling tool being coupled to a drill bit at its distal end, the directional drilling tool being capable of adopting multiple angular orientations; and a controller configured to transmit one or more control signals to cause the axial thrusting mechanism(s) to apply axial thrust to the directional drilling tool in dependence on the angular orientation of the directional drilling tool relative to a target steering direction.

The application discloses an ultra-precision air static pressure rotary table, which comprises a radial brass bearing sleeve, a table top, a base, a feedback grating system, an axial thrust, a gas distribution block and an air bearing core. The application has the advantages that: for the 300mm nominal disc diameter specification, the four core performance requirements of focusing low speed / low-medium speed operation, large load bearing, ultra-high structural rigidity and nanometer level rotation accuracy can be met, and the application can be widely applied to 300mm semiconductor wafer detection and calibration platforms, optical element ultra-precision grinding / polishing machine tools, diamond tool ultra-precision cutting rotary tables, large-size part high-precision measurement detection instruments, micro-nano manufacturing system rotary tables, aerospace precision component processing equipment and other national strategic high-end manufacturing equipment. The application is a core basic component for supporting modern ultra-precision machining, semiconductor detection, optical manufacturing and precision measurement industry to realize low-speed stable operation, heavy load support, high rigidity precision protection and nanometer level positioning.

The invention relates to the field of high-pressure boiler feed pumps, and particularly discloses an energy-saving balanced type high-pressure boiler feed pump which comprises a pump body, a pump shaft, a tail cover and a bearing cover, the pump body is provided with a liquid inlet section and a liquid outlet section, the pump shaft is provided with a plurality of impellers, and the pump shaft is provided with a synchronous barrel abutting against the back faces of the impellers close to the non-driving end. A coarse adjustment plate is fixedly connected to the synchronous cylinder, a throttling gap is reserved between the coarse adjustment plate and the pump body, a fine adjustment plate is arranged on the peripheral wall of the coarse adjustment plate, a fine balance cavity is reserved between the back face of the fine adjustment plate and the pump body, and a control mechanism used for controlling hydraulic pressure of the fine balance cavity is arranged in the pump body. A separation mechanism used for separating the coarse balance cavity and the fine balance cavity is arranged in the pump body, and a supply mechanism used for supplying balance liquid into the coarse balance cavity is arranged on the pump body. The pump has the advantages that the axial thrust is balanced, the pump shaft does not need to axially float, the stability is high, and the rough adjustment plate and the fine adjustment plate cannot be abraded.

The application relates to the technical field of connecting joints, and in particular provides a switch cabinet test terminal which comprises a connector body, a terminal connecting body and a plastic deformation structure, the connector body is internally provided with a first conductor, the terminal connecting body is internally provided with a second conductor, the outer surface of the terminal connecting body is provided with a radial protruding part, a plastic deformation cavity is formed in the radial protruding part, the plastic deformation structure comprises a plastic deformation space between the radial protruding part and the first conductor, the terminal connecting body is provided with a conical cavity which forms a locking connection relationship with the connector body and makes the first conductor and the second conductor abut and conduct electricity, the plastic deformation structure further comprises a spring which is compressed in the plastic deformation space, an axial thrust pushes an axial variable combination, drives the terminal connecting body to retreat along the axial direction, at the same time, the spring releases the stored energy, accelerates the retreat movement of the terminal connecting body, the second conductor retreats along with the terminal connecting body, and is separated from the first conductor, and automatic power-off protection is completed.

This invention discloses a biomimetic robotic fish with amphibious capabilities and its control method, belonging to the field of robotics technology. The robotic fish comprises an unsealed head assembly, a fully sealed body assembly, and a flexible tail assembly. Symmetrically positioned on both sides of the head assembly are dual pectoral fins controlled by independent waterproof bus servos. The body assembly integrates a microcontroller, a brushless DC motor, and a reel. In underwater maneuvering mode, the microcontroller controls the brushless DC motor to pull the flexible tail assembly through a transmission rope to provide axial thrust, while independently adjusting the fluid angle of attack of the dual pectoral fins to generate lift or sinking, achieving three-dimensional spatial maneuvering. In amphibious crawling mode, the dual pectoral fins serve as mechanical support limbs, propelling the body forward through periodic contact with the ground. This invention overcomes the limitations of traditional robotic fish that rely on water buoyancy and two-dimensional planar movement, achieving continuous operation and three-dimensional attitude control across various media environments.