19383 results about "Stator" patented technology

The invention includes a screw actuator. The screw actuator includes a screw having a screw shaft and a screw nut. The screw shaft defines a first longitudinal axis along its length. The screw nut at least partially surrounds the screw shaft. The screw actuator includes a motor having a stator and a rotor. The rotor is mechanically coupled to the screw shaft. The stator at least partially surrounds the rotor. The screw actuator includes a first rigid member having a length dimension oriented along the first longitudinal axis. The screw actuator includes a second rigid member mechanically constrained relative to the first rigid member. The second rigid member is configured to move along a direction of the first longitudinal axis.

The invention relates to the technical field of vehicle motors, in particular to a vehicle motor stator and rotor life prediction method and system, and the method comprises the steps: obtaining temperature distribution data, vibration spectrum data and current harmonic characteristic data during the operation of a stator and a rotor; performing time-frequency domain fusion analysis based on the temperature distribution data and the vibration spectrum data to obtain thermal coupling degradation characteristics, and obtaining electromagnetic performance degradation characteristics based on the current harmonic characteristic data; training to obtain a life prediction model based on a mapping relation between historical degradation characteristics and a failure threshold value, inputting the thermal coupling degradation characteristics and the electromagnetic performance degradation characteristics into the life prediction model, and outputting a residual life prediction value of the stator and the rotor; and dynamically adjusting operation parameters of the motor according to the residual life prediction value. According to the method, the problems that the life prediction precision is low and the operation strategy cannot be dynamically optimized due to the fact that the collaborative degradation effect of the stator and the rotor of the vehicle motor under the multi-physical field coupling effect is difficult to quantify in real time are effectively solved.

A fluid transfer device for a turbomachine with longitudinal axis X, which includes a stator portion intended to be connected to a stator equipment of the turbomachine and a rotor portion engaged in the stator portion. The stator equipment including at least one conduit fluidly connected to at least one pipeline of the stator portion, the stator portion and the stator equipment including an attachment interface intended to releasably receive attachment members, the attachment interface and the attachment members being configured so as to make a sealed coincidence of the pipelines and conduit, and the transfer device comprising at least one passage allowing the access of an external tool upstream of the transfer device for accessing the attachment members and passing through the transfer device in either side.

A turbine engine with an engine core defining an engine centerline and comprising a rotor and a stator. The turbine engine including a set of composite airfoils circumferentially arranged about the engine centerline and defining at least a portion of the rotor. An airfoil in the set of composite airfoils including a composite portion extending chordwise between a composite leading edge and a trailing edge and a leading edge protector coupled to the composite portion.

The invention belongs to the technical field of robots, and provides a robot joint module which comprises a driving mechanism, a speed reducing mechanism and an output mechanism which are in transmission connection in sequence, the driving mechanism generates torque, and the torque is output through the output mechanism after being increased through the speed reducing mechanism; wherein the driving mechanism is provided with a power cavity, and a stator and a rotor rotating around the periphery of the stator are arranged in the power cavity; the rotor is provided with a rotor magnet yoke with fan blades, and external air can enter the power cavity from the axial direction of the stator through rotation of the rotor magnet yoke and is discharged in the radial direction of the stator so as to take away heat generated in the power cavity to achieve heat dissipation of the stator and the rotor. Through the rotor magnet yoke with the fan blades, air flow in the power cavity can be accelerated, external air is guided to enter the power cavity and is discharged to form an efficient heat dissipation channel to take away heat, the heat dissipation capacity is improved, the heat dissipation effect is enhanced, overheating of the driving mechanism is avoided, the service life of the driving mechanism is prolonged, and the reliability of the joint module is effectively improved; and the stability of the robot during long-time operation is ensured.

A land to air vehicle with lower extendable wings and upper extendible wings, a body, a front hood fan, a rear fan and wheels. The wheels include wheel bases, exterior tires circumscribing the wheel bases, and a fan wheel assembly within each wheel base. The wheel assembly includes extendible fans, a rotor outer rim with teeth for holding a stator inner rim, a propeller shroud configured to house a variety of fan blades, at least one fan within the propeller shroud, a hinge fixedly attached to the outer rotor rim and the propeller shroud, a wheel motor platform and a wheel motor. The hinge is structured to allow the propeller shroud with fans to extend distally from the wheel base interior to navigate the land to air vehicle.

A blower (1) for a fuel cell assembly for recirculating a gas mixture used for operating the fuel cell assembly is equipped with a drive motor (7, 8, 9) comprising a rotor (9) coupled to a motor shaft (7) and a stator (8) arranged radially outside the rotor (9). An annular channel (10) is provided radially between the rotor (9) and the stator (8) for conveying the gas mixture from an inlet side to an outlet side of the annular channel (10). A blower impeller (5) coupled to the motor shaft (7) is provided in the region of the outlet side of the annular channel (10) to convey the gas mixture from the inlet side to the outlet side of the annular channel (10) when rotating. Furthermore, a flow guide device (14) is provided to impart a circumferential swirl to the gas mixture entering the annular channel (10).The annular channel (10) is bounded by an assembly consisting of an outer wall (16; 21) and an inner wall (17), wherein the flow guide device (14) is provided on the inlet side between the outer wall (16; 21) and the inner wall (17).

A turbine engine with an engine core defining an engine centerline and comprising a rotor and a stator. The turbine engine including a set of composite airfoils circumferentially arranged about the engine centerline and defining at least a portion of the rotor. An airfoil in the set of composite airfoils including a composite portion extending chordwise between a composite leading edge and a trailing edge and a leading edge protector coupled to the composite portion.

The utility model provides a cantilever type magnetic drive pump, and belongs to the technical field of pumps. The technical problem that an existing cantilever type magnetic drive pump is not good enough in sealing effect is solved. A cantilever type magnetic drive pump comprises a pump shell and a motor shell, a stator assembly is fixedly installed between the pump shell and the motor shell, a rotor assembly rotating relatively is embedded in the stator assembly, an impeller is fixedly connected to the rotor assembly, the stator assembly comprises a stator shielding sleeve and a stator assembly wrapped by the stator shielding sleeve, and a concave cavity is formed in the middle of the stator shielding sleeve. The bottom of the concave cavity protrudes towards the impeller to form an installation column, a reinforcing piece is arranged in the installation column, the rotor assembly is embedded into the concave cavity and fixedly and rotatably arranged outside the installation column in a sleeving mode, the installation column penetrates through the middle of the rotor assembly, and the impeller is fixedly connected to the rotor assembly. The sealing device is good in sealing effect and stable in rotation.

The invention relates to the technical field of heart blood pumps, in particular to a passive ventricular auxiliary circulation device. Comprising a motor body shell, a stator and a rotor are arranged in the motor body shell, and one of the stator and the rotor comprises a coil; the axial flow channel shell is sleeved; the upper end of the axial flow channel shell is configured to face the aortic valve to the lower part of the ventricle, and a power supply configured to be operably coupled to the coil; and the controller is configured to be operated and coupled to the power supply to select and control the power supply to change the rotor to a certain rotating speed in a manual selection mode, then the rotor keeps working in a certain rotating speed mode, and corresponding auxiliary pressure output by the fluid outlet interface is configured at a different rotating speed. The device is controlled to be in a rotating speed state, and when systolic pressure smaller than normal systolic pressure is provided for cardiac pulsation of a heart failure patient, the normal systolic pressure is provided when the systolic pressure and auxiliary pressure are overlapped together, so that the heart failure patient maintains the normal systolic pressure.

The utility model discloses a rotary compressor and refrigeration equipment, and relates to the technical field of compressors, the rotary compressor comprises a motor, the motor comprises a stator and a rotor, the stator comprises a stator iron core and a stator winding, the stator iron core comprises an annular yoke part and a plurality of tooth parts arranged in the yoke part, the plurality of tooth parts are spaced along the circumferential direction of the yoke part, and the stator winding is arranged in the yoke part; a stator groove is formed between every two adjacent tooth parts, the stator winding is wound in the stator grooves, and the rotor comprises a rotor iron core; the pump body part comprises a crankshaft, an upper bearing and a cylinder; the number of the stator grooves is Q, the number of poles of the rotor is P, the maximum outer circle contour radius of the rotor core is R1, the maximum outer circle contour outer diameter is D1, D1 = 2 * R1, the outer diameter of the part, matched with the upper bearing, of the crankshaft is D2, GCD (Q, P) is the largest common divisor of Q and P, and GCD (Q, P) is larger than or equal to # imgabs0 # 5 and smaller than or equal to 6. The rotary compressor disclosed by the utility model is beneficial to improving the energy efficiency of the rotary compressor and reducing the electric energy consumption during operation.

An intravascular blood pump comprises a pumping device including an impeller and an electric motor for driving the impeller. A rotor of the electric motor is rotatable about an axis of rotation and coupled to the impeller so as to be able to cause rotation of the impeller. An outer sleeve forms a casing of the pumping device, wherein stator components are fixed inside the outer sleeve by means of a casting compound. In a method of manufacturing the blood pump the stator components are placed on a molding base, including the outer sleeve to thereby form an interspace between the molding base and the outer sleeve in which the stator components are disposed. The casting compound is then injected into the interspace via the molding base to fix the stator components inside the outer sleeve. The outer sleeve preferably comprises a magnetically conductive material to form a yoke of the electric motor.

An aeronautical thruster of longitudinal axis has a hub, an annular row of unducted upstream rotor blades and an annular row of unducted downstream stator blades. Each downstream stator blade is of variable pitch, and at least one of the downstream stator blades is in a closed-pitch configuration relative to another of the downstream stator blades in that it has a pitch angle smaller than the pitch angle of the other downstream stator blade.

This invention introduces a kinetic energy recovery wind-wave integrated system for offshore wind power generation. The system consists of a semi-submersible platform equipped with a fan and an internal wave energy device. The device includes a shell housing a Power Take-Off (PTO) system, featuring a permanent magnet synchronous linear motor and an active controller. The motor's stator is fixed inside the shell, while its mover is connected to a counterweight block outside the stator, linked to the shell's top via a spring. Limiters are installed at both ends of the shell to restrict the counterweight block's movement. This system utilizes the wave energy device to absorb kinetic energy, which otherwise affects wind turbine stability, and converts it into usable electrical energy via the PTO system. This enhances the stability and safety of offshore wind turbine power generation.

The invention discloses a method for suppressing subsynchronous oscillation of a doubly-fed grid-connected system, and relates to the technical field of stability control of a power system, and the method comprises the specific steps: S100, extracting the amplitude and phase angle of a subsynchronous frequency component, S200, generating a rotor compensation current instruction according to the amplitude and phase angle of the subsynchronous frequency component and a dynamic gain, and S200, generating a rotor compensation current instruction according to the rotor compensation current instruction; s300, dynamically adjusting the gain according to the suppression ratio and the amplitude of the target magnetic field during operation, S400, calculating the feed-forward decoupling voltage, S500, calculating the suppression ratio after injection, and executing a hierarchical control strategy. Subsynchronous oscillation suppression from the electromagnetic essential level is realized, and by monitoring the subsynchronous component of the air-gap magnetic field in real time and injecting the anti-phase compensation current at the rotor side, the suppression efficiency of the subsynchronous oscillation is improved. Active interference of a stator magnetic field and a rotor magnetic field in a subsynchronous frequency band is cancelled, an energy transfer path of subsynchronous oscillation is directly blocked, oscillation forming conditions are destroyed, and a dynamic gain adjustment mechanism optimizes compensation intensity according to a real-time suppression effect so as to cope with 5-45Hz subsynchronous oscillation frequency change.

The utility model relates to the technical field of flat wire forming equipment, and provides a plane bending device for bending a flat wire, which comprises a wire feeding device and a wire folding device, the line folding device comprises a supporting frame, a bending assembly, a bending driving assembly and a line pressing assembly. The bending assembly comprises a fixing shaft part and a bending part, wherein the fixing shaft part is provided with a guide groove allowing the flat wire to penetrate through, and the bending part is rotatably arranged on the periphery of the fixing shaft part with the axis of the fixing shaft part as the axis. The bending driving assembly drives the bending part to bend the flat wire outside the guide groove relative to the flat wire inside the guide groove around the fixed shaft part; the wire pressing assembly comprises a wire guiding seat provided with a wire guiding groove communicated with the guiding groove, a jacking and pressing block and a jacking and pressing power piece enabling the jacking and pressing block to jack and press the flat wire located in the wire guiding groove. Compared with the prior art, the flat wire forming device is not only suitable for flat wire forming of hairpin type windings, but also suitable for flat wire forming of I-shaped clip windings and part of stators needing narrow edge bending forming, and the application range is wider.

The invention provides a turbine blade design method which comprises the following steps: S1, dividing a turbine blade profile into four sections at equal intervals along the radial direction according to the size of a turbine, and calculating section parameters of a middle-section turbine blade profile; s2, connecting the four sections by adopting a third-order Bezier curve, defining a blade front edge angle theta as an included angle between the Bezier curve and a blade front edge radial inlet angle alpha, and generating a three-dimensional blade model by changing the inclination angle theta of each section; s3, performing optimization to obtain an optimized theta parameter; and S4, according to the optimized theta parameter, fitting each section blade profile by using a third-order Bezier curve to generate a turbine stator and rotor three-dimensional model. According to the method, the machine learning method is applied to design of the turbine blade, the three-order Bezier curve, the CFD numerical simulation method and the particle swarm optimization are utilized, the blade parameters are given, the geometric parameters can be quickly and accurately predicted, the calculated amount is reduced, the cost is reduced, the design efficiency is improved, and the quality of the designed blade is guaranteed.

A blood pump with a stator and rotor wherein the rotor is assembled by bonding the stator components with epoxy. The bonding surfaces of the rotor components are primed with a silane-based primer to improve adhesion between the primer and the rotor components by rendering such surfaces hydrophobic. A bonding surface of one of the stator yoke or the stator sleeve, or both, is treated with a primer that improves wettability of the bonding surface and improves bonding of the epoxy to the binding surface. The device has a bonding surface adhered to epoxy in which a primer was applied on such bonding surface prior to introducing epoxy onto the bonding surface. In addition to improved bond strength, hydrophobic surface would control moister ingress.

The present invention relates to an assembly (12) for a turbomachine, comprising: —an outer casing (15) made of half-shells; —an inner casing (14); —a plurality of guide vanes (13) mounted between the outer casing (15) and the inner casing (14), —a structural casing comprising a flange (23) which is radially inside the inner casing (14); and—a system (24) for blocking the inner casing (14) on the structural casing, comprising a generally annular tab (25) fixed to one of the inner casing (14) and the structural casing and a complementary chute (26) fixed to the other of the inner casing (14) and the structural casing, the chute (26) being configured to receive the tab (25) and to block it along the axis (X) with respect to the structural casing.

The stator device provided by the invention is used for the open type rotor engine, and comprises a stator blade base which is arranged on the open type rotor engine; the plurality of stator blades are mounted on the stator blade base and are arranged around the engine rotating shaft in the circumferential direction of the engine rotating shaft; the telescopic rod device is provided with a telescopic rod connected with the stator blade base, and the telescopic rod stretches out and draws back to enable the stator blade to be close to the engine rotating shaft or away from the engine rotating shaft in the radial direction of the engine rotating shaft; and the control device is connected with the telescopic rod device through a data line, and sends an instruction to the telescopic rod device to control the telescopic rod to stretch out and draw back, so that the stator blades are close to the engine rotating shaft or far away from the engine rotating shaft in the radial direction of the engine rotating shaft.

The invention relates to the field of aero-engine bearing cavity structure system testing, and particularly provides an aero-engine bearing cavity inner lubricating oil flow state measuring system which comprises a test piece main body simulating an aero-engine bearing cavity, an oil gas supply and recovery system and a control system. The test piece main body comprises a rotor test piece and a stator test piece which are connected together, and the oil gas supply and recovery system comprises an oil supply system, a gas supply system, an oil return pool and an oil gas separation pump. The control system comprises a controller, and an oil supply throttle valve, an air supply throttle valve, an exhaust throttle valve, a test data acquisition assembly and a test piece main body driving device which are in signal connection with the controller. On the basis of the method, the lubricating oil-air flowing state in the bearing cavity can be monitored and evaluated in real time, and test support can be provided for follow-up bearing cavity optimization design.

The invention discloses a stator blade shape-following frequency modulation design method based on a bending vibration mode and application, belongs to the field of vibration design of stator blades of aero-engines and gas turbines, and is suitable for vibration frequency modulation design of non-cantilever type stator structure blades (such as fans and gas compressor stators) with inner rings and outer rings in the aero-engines or the gas turbines. According to the method, firstly, static frequency and dynamic frequency modal analysis is carried out through finite element modeling, and dangerous resonance points and corresponding vibration modes in a working rotating speed range are recognized by combining a Campbell diagram; based on a vibration mode amplitude normalization result, setting a vibration degree parameter and a scale factor, selecting a high response node and carrying out directed disturbance, and updating a structure model to improve a target vibration mode frequency; and through frequency amplification verification and iterative optimization, geometric reconstruction and frequency modulation confirmation are finally completed in combination with aerodynamic performance and processing requirements. The method can realize rapid and accurate frequency modulation of a specific bending vibration mode, avoids introduction of new resonance, and has the advantages of high efficiency, strong adaptability and the like.

The invention relates to the technical field of piezoelectricity, and discloses a miniaturized double-foot stick-slip piezoelectric actuator which comprises a stator, a rotor, a pre-tightening device and a base. The stator is in sliding connection with the base, the stator can slide on the base in the Y-axis direction, and the pre-tightening force between the stator and the rotor is adjusted through the pre-tightening device; the stator is fixedly arranged on the base, the rotor is fixedly arranged on the base, a sliding block is arranged on the rotor, and the sliding block can horizontally slide in the X-axis direction under the driving of the stator. According to the invention, the two driving feet alternately drive the mover to displace, so that the phenomenon of rollback in output displacement is effectively solved.

The invention relates to the technical field of shaft protection assemblies, in particular to a shaft holding type shaft generator shaft fixing and centering protection assembly which comprises a generator body, a mounting structure, a protection structure, a shaft generator shaft, a first adjusting structure, a height adjusting structure and a second adjusting structure. The arrangement of the protection structure is convenient to limit the shaft of the shaft generator, the problem that the rotor and the stator collide with each other due to a large gap between the rotor and the stator when the generator body is hoisted or the rotor is secondarily installed is avoided, the operation is simple and convenient, the practicability is high, the arrangement of the first adjusting structure is convenient to accurately adjust the transverse position of the generator body, and the practicability is high. The shaft-driven generator shaft and other transmission shafts can be centered subsequently conveniently, the flexibility is high, the height of the generator body can be adjusted rapidly through the arrangement of the height adjusting structure, the longitudinal position of the generator body can be adjusted rapidly through the arrangement of the second adjusting structure, the operation efficiency is high, and repeated disassembly of bolts is avoided.

The invention discloses a stator winding grounding fault arc extinction method and system based on grounding transition resistance. The method comprises the following steps: S1, acquiring fundamental voltage of a neutral point and a machine end after normal operation and a grounding fault in real time; s2, calculating a fault phase potential EA1, and calculating a phase angle delta between the fault phase potential EA1 and the neutral point ground voltage UN1; s3, constructing a generator stator winding grounding fundamental wave fault analysis positioning equation, and substituting the measurement and calculation amount to complete fundamental wave fault positioning; s4, if multiple solutions occur in fundamental wave fault positioning, introducing a low-frequency injection quantity check criterion, and screening out a unique correct transition resistance value; and S5, carrying out arc extinction on the fault point of the neutral point of the generator in a high-resistance grounding mode. According to the method, the accuracy and reliability of fault positioning are remarkably improved, the possibility of misjudgment is eliminated, and an accurate compensation basis is provided for arc extinction.

The invention relates to the field of precise driving and positioning, in particular to a multi-mode bidirectional movement rotary piezoelectric motor. Comprising a base, a rotor mechanism, a stator mechanism and a pre-tightening mechanism, the stator mechanism comprises a flexible metal oscillator connected to the pre-tightening sliding block. The flexible metal oscillator comprises a diamond frame of a sheet structure and an elastic metal substrate connected between a set of opposite angles in the diamond frame. The two groups of piezoelectric ceramic pieces are symmetrically fixed on the same side surface of the elastic metal substrate; the motor further comprises a first driving foot and a second driving foot which are fixed to the flexible metal vibrator, the first driving foot and the second driving foot are fixed to the two adjacent corners of the rhombic frame body respectively, and the first driving foot and the second driving foot make contact with the inner ring of the rotor bearing. According to the technical scheme, through the asymmetric structural design, the rhombic flexible metal oscillator can generate two working modes, so that the motor realizes bidirectional rotation under the condition that the voltage and the structure are not changed.

The invention discloses a twisting clamping refrigerating and heating device with cold and hot end separation and work recovery functions. The twisting clamping refrigerating and heating device comprises a stator module, a rotor module and a heat exchange module. The stator module comprises an inner gear and an outer gear, and teeth are arranged on partial edges of the inner gear and the outer gear. The rotor module comprises a torsion clamping refrigerant and a loading gear; the heat exchange module comprises an inner cylinder and an outer cylinder. And the loading gear revolves to drive the torsion clamping refrigerant to change the heat exchange position, and rotates to drive the torsion clamping refrigerant to be loaded and unloaded. When the loading gear is meshed with the inner gear, the loading gear rotates in the forward direction, and the torsion clamping refrigerant generates heat due to loading; when the loading gear is meshed with the outer gear, the loading gear rotates reversely, and the torsion clamping refrigerant absorbs heat due to unloading. According to the device, a heat exchange area is effectively separated, the problem of mutual interference of cold and heat is avoided, and the heat exchange efficiency and power are greatly improved; the resilience force generated when the torsion clamping refrigerant is unloaded is transmitted to the loading area, auxiliary power is provided for the loading process, recycling of work is achieved, and the energy utilization efficiency is improved.

An aeronautical thruster of longitudinal axis includes a hub, an annular row of unducted upstream rotor blades, and an annular row of unducted downstream stator blades. The annular row of downstream stator blades includes at least one downstream stator blade of a first type, each of which is located about the longitudinal axis in a first angular sector about the longitudinal axis. Each downstream stator blade of the first type has a fixed pitch. The annular row of downstream blades further includes at least one downstream stator blade of a second type, each of which is located about the longitudinal axis outside said first angular sector, wherein each downstream stator blade of the second type has a variable pitch.

The invention discloses an oil-cooled motor rotor cooling structure, which is characterized in that a motor shaft comprises a hollow axial motor shaft inner cavity main oil way, a motor shaft excircle axial oil guide groove and a motor shaft radial oil guide hole arranged between the inner cavity main oil way and the motor shaft excircle axial oil guide groove; the rotor iron core is connected to the motor shaft; the two rotor end plates are respectively connected with the motor shaft and are respectively positioned at two ends of the rotor iron core; the rotor end plate is provided with a radial oil guide groove and a radial oil outlet groove; the radial oil guide grooves in the first rotor end plate are communicated with the axial oil guide grooves in the outer circle of the motor shaft and the rotor iron core magnetic isolation grooves, and the radial oil outlet grooves in the second rotor end plate are communicated with the rotor iron core magnetic isolation grooves. According to the invention, the flow distribution of the cooling oil paths at the two ends of the rotor can be more uniform at various rotating speeds without adding any additional parts, the influence on the dynamic balance of the rotor assembly is reduced, and the heat dissipation uniformity of the stator and the rotor of the motor can be improved.

Stator assembling equipment comprises a stator feeding device and a machine shell feeding device, and the stator feeding device comprises a stator translation mechanism arranged on a base and a stator lifting mechanism arranged above a press fitting station; the machine shell feeding device comprises a machine shell conveying mechanism and a machine shell heating mechanism. The stator lifting mechanism comprises a servo press fixed on the rack and a first mounting plate fixedly connected with the servo press; a stator pressing rod and a stator clamping jaw assembly are arranged at the bottom of the first mounting plate; the stator clamping jaw assembly controls grabbing and loosening of the stator, and the stator pressing rod maintains pressure on the stator. According to the utility model, the automatic assembly of the stator hot jacket is realized, and the assembly efficiency is greatly improved.