13621 results about "Motor shaft" patented technology

The invention discloses an energy storage lithium battery device capable of rapidly dissipating heat and cooling, and relates to the technical field of energy storage batteries, the energy storage lithium battery device comprises an energy storage lithium battery main body, a protective shell and a sealed liquid storage box, the bottom of the energy storage lithium battery main body is connected with the protective shell in a wrapping manner, and air cooling heat dissipation mechanisms are mounted on two sides of the protective shell; and the middle part of the bottom end of the protective shell is fixedly connected with a sealed liquid storage tank. Transmission gears at the two ends can be driven to rotate through a double-head servo motor and a motor rotating shaft, so that a driven gear block and a first cooling fan can be conveniently driven to rotate, and heat generated by an energy storage lithium battery main body in the protective shell can be dissipated to realize efficient air-cooling heat dissipation; and meanwhile, when the conveying hose is extruded, the heat dissipation liquid in the sealed liquid storage tank is extracted and circulates in the liquid cooling heat exchange pipe, and the heat dissipation liquid can absorb heat in the protective shell in the circulation process to achieve liquid cooling heat dissipation.

The invention discloses a magnetic suspension high-speed motor based on a centrifugal air cooling structure, and belongs to the technical field of magnetic suspension high-speed motors, the magnetic suspension high-speed motor comprises a main body assembly, the main body assembly comprises a front end cover, a motor shaft, two magnetic suspension bearings, a rotor, a stator core, a casing, a rear end cover, a protective cover, a protective net, a flow guide fan and an exhaust hole; the rotor is installed on the outer side wall of the motor shaft. When the motor shaft rotates, the flow guide fan is driven to rotate at a high speed, negative pressure is formed at the position of the exhaust hole, at the moment, external air flows into the heat dissipation flow channel through the air inlet flow channel, absorbs heat in the stator iron core, then flows into the machine shell, flows in the gap between the rotor and the stator iron core and is finally exhausted from the exhaust hole, and therefore heat dissipation is achieved. In the flowing process of the air, heat in the stator core and the rotor can be taken away, so that heat accumulation is avoided, and efficient heat dissipation of the stator and the rotor is realized.

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).

The invention relates to the technical field of motor shaft manufacturing, in particular to automatic milling equipment for motor shaft manufacturing. Comprising an equipment frame; a bottom plate is installed on the equipment frame, a milling mechanism used for milling a motor shaft from the side face is arranged on the rear side of the upper end of the bottom plate, and a fixing mechanism is arranged on the front side of the upper end of the bottom plate. According to the invention, the fixing mechanism firstly fixes and straightens the motor shaft, then the motor shaft is subjected to self-adaptive pressing through the pressing part, and then the milling mechanism mills the motor shaft from the side surface and cooperates with a cutting fluid, so that chippings generated in the milling process can be discharged from a key slot, and the damage to the key slot and a milling cutter is avoided; and the pressing part moves along with the milling mechanism in the milling process of the milling mechanism, so that the milling part of the milling cutter is relatively extruded and supported, the stability of the motor shaft is improved, vibration is reduced, and the milling quality of the key groove of the motor shaft is improved.

The invention provides a motor operation fault prediction method and system. The method comprises the following steps: collecting vibration signals and temperature data in operation in real time; frequency domain features, statistical features and time sequence features are extracted from the vibration signals and the temperature data to form a feature set; obtaining a training set, wherein the training set comprises a plurality of positive samples and a plurality of negative samples; training a fault prediction model based on the training set, wherein the fault prediction model comprises a support vector machine SVM sub-model and a long short-term memory network LSTM sub-model; and predicting a motor operation fault based on the trained fault prediction model. The problems that motor bearing fault predictive maintenance in the prior art is hysteretic and inaccurate, and an existing method cannot fully combine the advantages of frequency domain characteristics and time sequence analysis are solved.

The invention relates to the technical field of motor manufacturing and detection, and discloses motor rotating shaft concentricity inspection equipment which comprises a supporting mechanism, a rotation driving mechanism, a detection sensor group, a data processing unit and an output unit. The detection sensor group comprises at least two displacement sensors arranged at intervals along the radial direction of the rotating shaft and at least one angle sensor used for acquiring the rotating angle of the rotating shaft; the data processing unit constructs a three-dimensional space motion trail model of the rotating shaft in the rotating process according to angle position data collected by the angle sensor in real time and radial displacement data collected by the displacement sensor in real time so as to determine concentricity parameters of the rotating shaft; the rotation driving mechanism is electrically connected with the data processing unit and controlled by the data processing unit to drive the rotating shaft to rotate at a constant speed at a preset rotating speed, and the data processing unit transmits concentricity parameters to the output unit to be displayed or stored. The defects of a traditional detection method in the aspects of precision, efficiency and intelligence are overcome.

A feed distribution system for animals comprising a hopper for containing feed, a spinner plate mounted beneath the feed outlet of the hopper, and a motor for rotating the spinner plate. A closure apparatus for the spinner plate includes a central shaft and at least two support legs. The spinner plate is mounted on a motor shaft extending from the motor and is biased upward by the support legs to force the plate towards the bottom of the hopper. In the resting position, a minimal gap is maintained between the spinner plate and the bottom of the hopper such that the spinner plate can rotate without interference, but vermin cannot reach into the gap to access feed that may be on the spinner plate. The support legs are biased by a first biasing member to be in extension to inhibit the edge of the plate from being pulled downward if vermin try to hang from or pull down on the plate. Rotation of the spinner plate generates a centrifugal force to force the support legs into flexion and move the spinner plate downward along the central shaft away from the hopper and, thereby creating a larger gap and allowing the feed to be dispersed during the rotation of the spinner plate.

The invention discloses a motor rotating speed measuring method, system and equipment based on electromagnetic induction, and belongs to the field of motors. According to the embodiment of the invention, firstly, a magnetostriction resonance signal and an electromagnetic induction signal of a motor rotating shaft are obtained; performing frequency domain conversion on the magnetostrictive resonance signal to obtain magnetostrictive resonance frequency domain characteristics; performing frequency domain conversion on the electromagnetic induction signal to obtain electromagnetic induction frequency domain characteristics; frequency domain energy spectrum fusion reconstruction is carried out on the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics based on the frequency band matching relation between the magnetostriction frequency domain characteristics and the electromagnetic induction frequency domain characteristics, and a dual-frequency coupling energy spectrum is generated; and finally, determining the rotating speed of the motor rotating shaft according to the frequency position and amplitude distribution of the energy peak in the dual-frequency coupling energy spectrum, thereby improving the measurement precision of the rotating speed of the motor in a complex environment.

The invention belongs to the technical field of rotating motors, and discloses a motor with a self-locking function, and the motor comprises a housing which is internally provided with a polygonal cavity, and the polygonal cavity is provided with at least two groups of corner parts which are oppositely arranged; the stator magnets are arranged in the polygonal cavity in pairs, the stator magnets are installed at the corner parts in a one-to-one correspondence mode, the sides, facing the center, of the stator magnets are provided with arc-shaped faces, the arc-shaped faces are provided with grooves penetrating through the stator magnets in the height direction, and the stator magnets are divided into a plurality of stator magnetic poles through the grooves; the grooves in each stator magnet are formed in the same position; the plurality of arc-shaped surfaces are encircled to form a mounting area, the rotor is rotatably arranged in the mounting area, and the motor shaft is fixed in the center of the rotor and penetrates out of the shell. The motor with the self-locking function is high in self-locking stability, low in abrasion and adaptive to a compact structure.

The invention discloses an electrocorrosion protection device for a motor bearing and a motor comprising the electrocorrosion protection device, and the electrocorrosion protection device comprises an annular or fan-annular PCB substrate which is divided into a radial inner edge region, a radial outer edge region and a middle region between the radial inner edge region and the radial outer edge region; conductive fiber bundles are fixed in the tubular conductive components; a plurality of substrate conductive contacts located in the radial outer edge area and configured to be electrically connected to a housing or a ground terminal of the motor; the substrate conduction circuit is arranged on the surface of the first main body and allows the voltage at the exposed end of the conductive fiber bundle to be released to a shell or a grounding end of the motor through the substrate conduction circuit and the substrate conductive contact; the specific function component is arranged in the middle area or in the gap area between the tubular conductive components in the radial inner edge area. According to the invention, the requirements of miniaturization design of the servo motor, operation monitoring of the servo motor, bearing protection and the like can be met.

The invention relates to the technical field of electrical variable measurement, in particular to a rolling mill speed reducer monitoring and diagnosing system based on multi-source information fusion, which comprises an electrical parameter signal acquisition module for acquiring continuous readings of three-phase voltage and three-phase current of a rolling mill driving motor and synchronizing the readings. According to the method, the three-phase voltage and current data of the rolling mill driving motor are synchronously acquired, and the amplitude and phase are calibrated, so that a more accurate calibration electrical measurement set is obtained, and error propagation in a signal acquisition stage is effectively avoided; using the calibrated electrical data to directly calculate instantaneous input electric power, deducting motor loss to obtain an accurate motor shaft power sequence, and then using a Fourier transform method to extract key harmonic characteristics in a shaft power spectrum; and meanwhile, band-pass filtering and Hilbert transform analysis are carried out on the motor stator current, so that a clearer and more recognizable spectrum kurtosis value is obtained, and the judgment capability of current impact and periodic characteristics is enhanced.

The utility model relates to a coaxial double-motor power dividing hybrid power system structure. The transmission comprises a wheel output shaft, an engine input shaft, a GM motor, a TM driving motor, a GM motor sun gear, a GM motor planet gear, a TM motor sun gear, a TM motor planet gear and a gear ring. The engine input shaft is connected with the GM motor planet wheel through a planet carrier, one end of the GM motor planet wheel is meshed with the gear ring, the other end of the GM motor planet wheel is meshed with the GM motor sun wheel, and the GM motor sun wheel is connected with the GM motor through a GM motor shaft; the TM driving motor is connected with the TM motor sun wheel through a TM motor shaft, the TM motor sun wheel is meshed with one end of the TM motor planet wheel, and the other end of the TM motor planet wheel is meshed with the gear ring; and the gear ring is connected with the wheel output shaft.

The invention relates to the technical field of motor shaft size detection, in particular to motor shaft size detection equipment which comprises a detection table, a fixing mechanism, a length detection mechanism, a diameter detection mechanism and a cleaning mechanism. The length detection mechanism comprises a top plate, a detection plate, a first laser distance measuring sensor and a moving assembly, the cleaning mechanism comprises a transverse plate, an electromagnet, a sponge eraser, a telescopic assembly, a rotating assembly and a transmission assembly, and the diameter detection mechanism comprises a sliding frame, a sliding assembly and two second laser sensors. The length of the motor shaft can be detected, the diameter of the motor shaft can be obtained by arranging the two second laser sensors, the length and the diameter of the motor shaft can be synchronously detected by using one detection device, and the size detection efficiency of the motor shaft can be improved.

A diaphragm pump assembly can include a pump drive chamber, a first pump diaphragm chamber, and a second pump diaphragm chamber. The assembly can include a pump motor configured to rotate a motor shaft extending into the pump drive chamber. The assembly can include a cam connected to the motor shaft and configured to rotate in response to rotation of the motor shaft. The assembly can include a drive yoke having a yoke frame and a yoke pocket having a first wall and a second wall parallel and opposite the first wall. First and second pistons can connect to the drive yoke and to first and second diaphragms, respectively. The diameter of the cam can be less than and within 5% the width of yoke pocket and the yoke can be configured to move the pistons along a straight line.

The invention provides a bearing shaft entering machine which is applied to the technical field of motor bearing machining and comprises a rack, the rack comprises a base and a top face, and the top face comprises a magnetic ring detection area, a press fitting area, a defective area and a feeding area; the magnetic ring detection area, the press-fitting area, the defective area and the feeding area are distributed on the top surface; the magnetic ring bounce detection assembly is used for detecting the bounce difference between the magnetic ring and the rotor; the bearing feeding assembly comprises a rail, a conveying carrier, a feeding motor and an induction piece. One end of the track is arranged on the top surface of the rack; at present, when a magnetic ring, a rotor and a bearing are combined, if a gap exists between the magnetic ring and the rotor or the concentricity of the magnetic ring and the rotor has an error, the operation power and the service life of a final motor finished product can be influenced by continuous processing, and the service life of the motor finished product is influenced. And the step sequence for detecting whether press-fitting forming is carried out after processing is very tedious, the working efficiency is relatively low, and the reject ratio is high.

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.

A system, apparatus and method for controlling the stoppage of a spinning wing of a migratory bird decoy. When power is turned off by a remote controller, a photo eye sensor system identifies when a motor shaft needs to stop spinning so that the dark side of a wing stops facing upward. When the motor shaft is in a correct location, a wing shaft control cylinder is engaged, which locks the motor shaft / wing in the correct position with the dark side (feather) up. When engaged, a pin from the cylinder goes into a motor gear housing, which stops and holds the wing shaft, and therefore the wing, in the correct position.

A coaxial electric drive axle comprises an electric drive assembly and an electric drive axle housing, the drive assembly comprises a housing, a motor, a speed reducer gear set and a differential mechanism, the motor, the speed reducer gear set and the differential mechanism are arranged in the electric drive axle housing of an integrated structure, the electric drive axle housing comprises a main axle housing and a rear cover, the main axle housing is provided with a mounting cavity, the rear side of the main axle housing is connected with the rear cover, and the front side of the main axle housing is connected with the housing. The shell is provided with a stator fixing plate, a motor stator is fixed on the stator fixing plate, a motor shaft, an intermediate shaft and a differential mechanism are supported on the shell through bearings, the motor shaft is connected with the differential mechanism through a speed reducer gear set, the shell is connected with a main axle housing, and the motor, a primary driving gear, a secondary driven gear and the differential mechanism are arranged in a main axle housing mounting cavity. The motor shaft is a hollow shaft, one end of the left-end half shaft penetrates through the motor shaft to be connected with a differential mechanism left half shaft bevel gear, and one end of the right-end half shaft is connected with a differential mechanism right half shaft bevel gear.

The invention discloses a fan and an assembling method of the fan, and the fan comprises a motor base, a motor shaft, a motor shaft and a driving part, the fan head is detachably connected with the motor base, rotatable fan blades are arranged in the fan head, the fan blades are detachably connected with the driving part in a power mode, and the driving part is used for driving the fan blades to rotate. According to the fan disclosed by the embodiment of the invention, the fan head is detachable relative to the motor base, so that a user can conveniently increase the cleaning frequency of the fan head, and when the fan is detached relative to the motor base, the fan blades are also connected and separated relative to the driving part, so that the user can conveniently clean the fan head and the fan blades inside, and dust is not easily accumulated in the fan head; and it is guaranteed that the blown air is cleaner, the safety is high in the fan head cleaning process, and the user experience is improved.

The utility model relates to a brewing device of a large-dose coffee machine, which is designed for solving the technical problems that the brewing device of the existing similar coffee machine product is not good enough in structural design, so that the production and the assembly are more inconvenient, the liquid pressing one-way powder pressing is less adopted, the volume of a brewing cavity is smaller, and the coffee brewing mode is more single. The brewing device is characterized in that a hydraulic combination of the brewing device is fixedly arranged in a screw rod, an external thread of the outer diameter of the screw rod is meshed with an internal thread of the inner diameter of a bevel gear, and at least one side of the outer diameter of the bevel gear extends out of an outer gear ring of the hydraulic combination to be meshed with a small gear at a motor shaft of a second motor; a hydraulic connecting hole is formed in the top of the liquid outlet channel of the sealing seat; a residue ejecting push rod is arranged in an end corner groove of a main body below the brewing cavity, a push rod head at one end of the residue ejecting push rod extends into the powder pressing combination and is inserted into a rod hole in the tail end of a rod part at one end of a brewing cavity push rod extending out of the bottom of the brewing cavity connected into the powder pressing combination, and the push rod spring is arranged on the outer diameter of the rod part at the end.

The invention discloses transmission case rotating shaft torque testing equipment for simulating limit load, which relates to the technical field of sensor detection, and comprises a transmission case unit to be detected, a loading table and a lifting table, and the transmission case unit is composed of a generator, a motor shaft, a coupling, an output shaft and a diesel engine set. A driving wheel set is arranged on the loading table, a transmission case unit to be detected is placed on the loading table, a plurality of lifting hydraulic cylinders are arranged at the bottom of the lifting table, a first transmission unit and a second transmission unit are arranged on the lifting table in a sliding mode, and the first transmission unit and the second transmission unit make contact with the transmission case unit. A detection assembly is arranged between the first transmission unit and the second transmission unit, and the detection assembly detects the torque of the output shaft, the torque of the output shaft is measured on the premise that the transmission box is not disassembled, the detection efficiency of the transmission box is improved, and an operator can conveniently overhaul and maintain the transmission box.

The invention discloses a motor bearing remaining service life prediction method and system using health indexes, and belongs to the technical field of automation. According to the method, time domain, frequency domain and time-frequency domain characteristic extraction is carried out on a vibration signal sequence, and sensitive characteristics of a degradation process can be accurately reflected through monotonicity and time correlation screening. And performing principal component analysis and dimension reduction on the screened features, and selecting the maximum principal component as a health index. And calculating an initial degradation point of the health index and dividing the data set. When residual service life prediction is carried out, an input signal is decomposed into a trend part and a residual error part, different models are used for feature extraction, and finally a residual service life prediction result is output. Through the steps of health index construction, signal decomposition, feature extraction, residual service life prediction and the like, the degradation stage can be accurately divided, meanwhile, accurate feature extraction and service life prediction can be carried out on data of the degradation stage, and the service life prediction accuracy is improved.

The invention, which relates to the technical field of the motor, discloses a variable-frequency and variable-speed permanent magnet motor of a stator core heat dissipation structure without a casing, comprising a stator core, an end cover, a motor shaft, a rotor, an axial fan, a heat dissipation channel, a spacer ring, a heat dissipation port, a protective cover, a baffle plate and a mounting seat, the baffle plate is provided with a communication port corresponding to a mounting cavity and the heat dissipation port; the low-temperature shrinkage stress prevention assembly is mounted on the baffle and used for driving the baffle to rotate, so that the opening part of the heat dissipation opening is opened and closed; and the air flow adjusting assembly is arranged on the mounting seat and is used for adjusting the air flow in the heat dissipation channel based on the rotating speed of the motor shaft. According to the invention, the air flow adjusting assembly is used for adjusting the air flow rate in the heat dissipation channel when the rotating speed of the motor shaft changes, so that the air flow rate in the heat dissipation channel is increased when the rotating speed of the motor shaft is reduced, and thus the air flow rate in the heat dissipation channel is relatively high when the rotating speed of the motor shaft is reduced; and therefore, the influence on the gas flowing effect is small.

The invention provides a double-screw pump helical casing molded line forming and milling device, which relates to the field of helical casing processing, and comprises a base, a driving screw, a fixed bracket and a movable table, a threaded cylinder is installed on the bottom side in the moving table, the driving screw is further in engaged connection with the threaded cylinder through threads, two sets of machining material driving shafts are rotationally clamped to the moving table, and supporting structures are further arranged on the lower sides of the foremost ends of the parts, with the large diameters, of the two sets of machining material driving shafts. Lifting structures are further arranged at the front ends of the small-diameter parts of the two sets of machining material driving shafts, the fixing support is fixed to the base, a double-end driving motor is installed at the rear end of the top of the fixing support, and two sets of milling cutter driving shafts are rotationally clamped to the inner side of the upper end of the fixing support; and the rear end of the milling cutter driving shaft is in transmission connection with a motor shaft at the rear end of the double-head driving motor. Two sets of spiral raw materials can be machined at the same time, the manufacturing cost is low, and the problems that an existing machining machine tool is high in investment and low in machining efficiency are solved.

The invention discloses a control system for exciting a steam delivery needle to advance and retreat through double motors and a steam ablation pistol, the control system comprises a double-motor driving module, the double-motor driving module comprises a winding motor driving circuit, and the winding motor driving circuit is used for executing winding motor rotation according to a first control instruction and driving the steam delivery needle to move back and forth until the steam delivery needle moves to a target position; the striking motor driving circuit is used for executing rotation of the striking motor according to the second control instruction and controlling locking or instant release of the transmission component through a limiting component arranged on a striking motor shaft; the thrust feedback module is used for detecting the arriving position of the transmission part and feeding back the current arriving limiting information to the main control module; and the main control module is used for sending a first control instruction to the winding motor driving circuit according to the limiting information, and sending a second control instruction to the striking motor driving circuit under the condition that the winding motor driving circuit moves to a target position to control the pre-tightening force, so as to complete the rapid puncture and needle return of the steam delivery needle.

The invention discloses a magnetic suspension high-speed motor with an air cooling structure, and relates to the technical field of magnetic suspension high-speed motors, the magnetic suspension high-speed motor comprises a heat dissipation assembly, and the heat dissipation assembly comprises a casing, a rotor core, two end covers, two magnetic suspension bearings, two heat dissipation seats, heat dissipation grooves, guide vanes and exhaust holes. When heat dissipation operation is carried out, negative pressure is generated outside the exhaust holes, at the moment, external air flows into the air inlet grooves and then is discharged out of the machine shell from the exhaust holes after half circulation in the machine shell, and heat dissipation of the motor shaft, the rotor iron core, the stator iron core and the stator winding is achieved in the air flowing process. According to the invention, the air flow channels are arranged in the motor shaft and the rotor core, so that external air can enter the motor from the two sides of the motor and then is discharged from the two sides of the motor, no large pressure drop is generated in the process, heat dissipation is more sufficient, and the heat dissipation effect is better.

The present disclosure provides an underactuated end effector for a humanoid robot. The end effector includes a frame, a plurality of finger assemblies removably connected to the frame, and a thumb assembly removably connected to the frame. Each finger assembly includes a finger motor assembly. The thumb assembly includes a first thumb motor with a first thumb motor shaft configured to rotate about a first motor shaft axis, and a first motor gear connected to the first thumb motor shaft. The thumb assembly also includes a second thumb motor with a second thumb motor shaft configured to rotate about a second motor shaft axis, and a second motor gear connected to the second thumb motor shaft. The first motor shaft axis is substantially parallel to the second motor shaft axis, and the first motor gear axis is substantially parallel to the second motor gear axis.

The systems and methods presented herein include a sidewall coring tool assembly that includes a coring shaft having an internal cavity and configured to be coupled to a coring motor shaft of a coring motor at a first axial end of the coring shaft. The coring shaft includes a plurality of scoops disposed circumferentially on a first external surface of the coring shaft. Each scoop of the plurality of scoops forms a conduit from an exterior of the coring shaft to an interior of the coring shaft. The sidewall coring tool assembly also includes a coring bit coupled to the coring shaft at a second axial end of the coring shaft. The sidewall coring tool assembly further includes a static sleeve coupled to the coring motor and disposed radially within the internal cavity of the coring shaft.

An oil-cooled powertrain (10) and an electric vehicle (1). The oil-cooled powertrain (10) comprises a reducer (300), a motor (100) and an oil pipe (340). The reducer (300) comprises a reducer input shaft (330), the motor (100) comprises a motor shaft (140), the reducer input shaft (330) is fixedly connected to the motor shaft (140), and the motor shaft (140) is used for transmitting power to the reducer input shaft (330). The reducer input shaft (330) comprises a reducer shaft cavity (331), the reducer shaft cavity (331) is used for accommodating the oil pipe (340) and part of the motor shaft (140), the oil pipe (340) is relatively fixed to the reducer input shaft (330), the motor shaft (140) comprises a motor shaft cavity (143), and the oil pipe (340) is used for conveying coolant oil to the motor shaft cavity (143). Along the shaft direction of the motor (100), the reducer shaft cavity (331) runs through the reducer input shaft (330), and the motor shaft cavity (143) runs through the motor shaft (140). The oil pipe (340) and the motor shaft (140) are arranged in the shaft direction of the motor (100), and the oil pipe (340) is communicated with the motor shaft cavity (143). By providing the oil pipe (340) in the reducer shaft cavity (331), the coolant oil is conveyed from the reducer (300) to the motor (100), so that the coverage range of the coolant oil in the oil-cooled powertrain (10) is expanded, and the cooling efficiency can be improved.

The invention discloses a machine tool spindle thermal error real-time compensation method and system, and relates to the technical field of machine tool machining. At least three temperature sensors are arranged on the surface of a bearing machine body based on a main shaft motor, a three-dimensional laser displacement sensor is coaxially installed at the output end of a main shaft, and multi-point temperature data (T1, T2,..., Tn) and real-time displacements (Px, Py, Pz) of the main shaft in the X, Y and Z directions are collected in real time. Thermal error model parameters can be updated in real time through the set recursive least squares algorithm with the forgetting factor, thermal characteristic changes of the main shaft under different working conditions are automatically adapted, frequent manual intervention is not needed, an error compensation priority judgment unit of the motion compensation module can automatically switch compensation modes according to the thermal error change rate, and the accuracy of thermal error compensation is improved. When the error change rate exceeds 0.1 mm / min, the influence time can be shortened to 50 ms through the rapid compensation mode, and the automation level and the production efficiency of machine tool machining are effectively improved.