6655 results about "Crankshaft" patented technology

The invention relates to the technical field of grinding machining, and particularly discloses a crankshaft connecting rod grinding force dynamic error compensation method and system.The method comprises the steps that a prediction reference signal is collected; a grinding force signal of the grinding wheel spindle is collected based on a piezoelectric sensor; extracting spectrum characteristic parameters according to the predicted reference signal; predicting grinding force fluctuation information according to the spectrum characteristic parameters; a feedforward compensation instruction is generated according to the grinding force fluctuation information; generating a feedback compensation instruction according to the difference between the grinding force signal and the target grinding force of the current task; synthesizing the feedforward compensation instruction and the feedback compensation instruction to generate a compensation control instruction; according to the method, a control strategy combining feedforward and feedback is adopted, the response speed and compensation precision of a system to dynamic changes of grinding force are remarkably improved, accordingly, elastic deformation caused by fluctuation of the grinding force is effectively restrained, and finally the grinding machining precision and surface quality of key parts of the crankshaft connecting rod are improved.

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.

The present invention relates to a flywheel (1) for a drive train of a motor vehicle, comprising a main flywheel mass (4) forming an input side (2) which can be screwed to a crankshaft of an internal combustion engine through a plurality of screw holes (5) distributed in the circumferential direction (U) of the flywheel (1), a slip clutch (6) arranged downstream of the main flywheel mass (4) in a torque transmission path emanating from the input side (2), and a torsional vibration damper (7) arranged downstream of the slip clutch (6) in the torque transmission path and which has both an output flange (11) and a hub (8) forming an output side (3), which is connected in a rotationally fixed manner to the output flange (11), with through holes (10) distributed in the circumferential direction (U), wherein the torsional vibration damper (7) has a disassembly device (12) which can be removed by rotation and which is designedto remove the non-rotatable connection of the hub (8) to the output flange (11) so that the through holes (10) can be aligned with the screw holes (5).

The invention discloses a transmission assembly assembling device which comprises a rotary disc assembly, a synchronous material taking and assembling unit, a pawl material taking and assembling mechanism, a shaft sleeve material taking and assembling mechanism, a bearing material taking and assembling mechanism, a pressing mechanism and a discharging mechanism, and the pawl material taking and assembling mechanism, the shaft sleeve material taking and assembling mechanism, the bearing material taking and assembling mechanism, the pressing mechanism and the discharging mechanism are all installed on a workbench. The synchronous material taking and assembling unit comprises a ratchet ring material taking and assembling mechanism, a crankshaft material taking and assembling mechanism and a gasket material taking and assembling mechanism which are installed on the first translation module and located above the rotary disc assembly, and a ratchet ring material conveying mechanism, a crankshaft material conveying mechanism and a gasket material conveying mechanism are arranged at the first working position of the synchronous material taking and assembling unit; the second working position of the synchronous material taking and assembling unit is matched with the third assembling positioning hole, a shaft sleeve conveying mechanism is arranged at the first working position of the pawl material taking and assembling mechanism, and a bearing conveying mechanism is arranged at the first working position of the bearing material taking and assembling mechanism. Automatic assembly can be achieved, and the assembly efficiency is improved.

The invention provides a marine diesel engine shafting longitudinal-torsional coupling vibration calculation method. The method specifically comprises the following steps: S1, calculating crankshaft longitudinal-torsional coupling rigidity; s2, calculating torsional vibration excitation at the propeller by using a CFD method; s3, establishing a ship propulsion shafting coupling free vibration kinetic equation through the calculated longitudinal-torsional coupling stiffness; s4, calculating a longitudinal-torsional coupling inherent frequency and a vibration mode of the ship propulsion shafting through a coupling free vibration kinetic equation of the ship propulsion shafting; and S5, substituting the propeller excitation calculated in the step S2 into the ship propulsion shafting coupling forced vibration kinetic equation to calculate the longitudinal-torsional coupling forced vibration response of the ship propulsion shafting. According to the marine diesel engine shafting longitudinal-torsional coupling vibration calculation method, the crankshaft longitudinal-torsional coupling rigidity is calculated based on a material mechanical deformation energy method, and related exciting force considering the crankshaft longitudinal-torsional coupling effect is obtained by combining related formulas of marine diesel engine shafting dynamics; and finally, ship shafting longitudinal-torsional coupling vibration inherent characteristics and ship shafting longitudinal-torsional coupling forced vibration response are obtained through calculation.

The invention relates to the technical field of automobile part machining, and particularly discloses a crankshaft machining optimization method and system.The method comprises the steps that a grinding force signal and a vibration signal in the grinding process are collected; grinding feature information is obtained according to the grinding force signal, and vibration feature information is obtained according to the vibration signal; material hardness information is generated according to the grinding feature information; grinding stability information is generated according to the grinding feature information and the vibration feature information; on the basis of a preset strategy library, parameter adjustment amount is generated according to the material hardness information and the grinding stability information, and the parameter adjustment amount comprises feeding speed adjustment amount and / or grinding depth adjustment amount; according to the method, a grinding force signal and a vibration signal which are acquired in real time based on a sensor are converted into quantitative information reflecting the material hardness and the grinding stability, and the parameter adjustment amount is dynamically generated according to the real-time information based on a preset strategy library, so that the effect of considering the machining efficiency and the stability is achieved.

The invention discloses a digital twin intelligent test run system based on a marine medium-speed diesel engine and a monitoring method, relates to the technical field of monitoring, and is used for solving the problems of degeneration identification lag and low emission early warning precision of an oil injector. The system comprises a multi-source heterogeneous data preprocessing module and a running state intelligent diagnosis module. The multi-dimensional data acquisition module is used for acquiring in-cylinder pressure, crankshaft torsional vibration and transient air-fuel ratio signals to construct multi-dimensional data vectors, and the multi-dimensional data acquisition module is used for analyzing combustion fluctuation characteristics based on an attention mechanism LSTM (Long Short Term Memory) network, identifying early deterioration of an oil injector and outputting an oil injection consistency coefficient and a fault type identifier. The method comprises the steps that according to an oil injection consistency coefficient, electromagnetic valve response delay and combustion parameter correlation are tracked, a degradation trend is predicted, and emission early warning is generated; and according to prediction and early warning results, fuel injection compensation parameters are dynamically adjusted in the digital twinborn model, a recursive least square method is adopted to identify combustion parameters and feed the combustion parameters back to an electric control unit, and self-adaptive optimization and closed-loop control in the test run stage are achieved.

The utility model relates to the technical field of crankshaft machining, and discloses a crankshaft burr grinding machine which comprises a machine frame, chucks are rotationally connected to the two sides of the machine frame respectively, a first motor is fixedly connected to the outer portion of one side of the machine frame, and rockers are rotationally connected to the tops of the chucks on the two sides respectively. Clamping blocks are slidably connected to the close sides of the chucks on the two sides, chucks are fixedly connected to the close sides of the clamping blocks on the two sides, a crankshaft is arranged between the chucks on the two sides, the clamping blocks are in threaded connection with the rocker, a detection assembly is arranged at the top of the rack, and a grinding wheel is arranged in the middle of the rack. According to the crankshaft grinding device, the clamping block can move in the chuck by rotating the rocker, then the position of the chuck is adjusted, the connecting rod journal can rotate with the central axis of the first motor as the rotating shaft, and therefore the situation that due to the fact that manual grinding errors are large, the crankshaft is excessively abraded, and the precision of the crankshaft is affected can be avoided.

The utility model discloses a crankshaft end face runout detection device. The device comprises a pedestal; the positioning assembly is arranged on the base and used for placing the crankshaft; the driving assembly is used for driving the crankshaft, and the positioning assembly can move in the height direction of the base so that a connecting rod neck of the crankshaft and an output shaft of the driving assembly can be coaxial. The detection assembly detects end face run-out values of the connecting rod neck and the main journal; at least one of the detection assembly and the positioning assembly can move in the length direction of the base so as to change the axial position of the detection assembly relative to the crankshaft. At least one of the detection assembly and the positioning assembly can move in the width direction of the base so as to change the radial position of the detection assembly relative to the connecting rod neck end face or the main journal end face of the crankshaft. Axis adjustment and alignment during detection of runout of the end face of the connecting rod neck are achieved through movement of the positioning assembly, total runout value detection of the end face of the main journal and the end face of the connecting rod neck is achieved through movement of the detection assembly and the positioning assembly, and the effect that the runout of the end faces of the main journal and the connecting rod neck can be detected through the same detection device is achieved.

The invention particularly relates to a grinding force closed-loop control and flutter suppression system for crankshaft variable stiffness machining, and aims to solve the problems of unstable grinding force, flutter and surface defects caused by time-varying stiffness characteristics of a crankshaft due to a multi-crank throw and cantilever supporting structure. The system comprises a grinding force detection module, a control module and an execution module. The grinding force detection module is arranged in a grinding wheel and crankshaft contact area and collects grinding force signals in real time. The control module receives an actual grinding force signal, compares the actual grinding force signal with a target value, and outputs a compensation instruction and a suppression instruction; the compensation instruction is generated by adopting a self-adaptive PID or fuzzy PID algorithm based on force deviation, and the grinding wheel feeding speed or the main shaft rotating speed is dynamically adjusted to stabilize the grinding force; and extracting a high-frequency component of the force signal as a flutter feature, identifying a flutter bud through time-frequency analysis, and generating an anti-phase displacement instruction to suppress flutter. The execution module adjusts feeding or rotating speed according to the compensation instruction and adjusts radial displacement of the crankshaft or the grinding wheel according to the suppression instruction.

The invention discloses a compressor crankshaft high-precision 3D shape detection method based on laser vision, belongs to the technical field of precision measurement and intelligent manufacturing, and aims to solve the problems existing in crankshaft detection. The method comprises the following steps: step 1, scanning a compressor crankshaft in a non-contact manner by adopting a three-coordinate motion platform carrying a line laser contourgraph to obtain an original three-dimensional point cloud; 2, carrying out the preprocessing of the original three-dimensional point cloud through employing adaptive radius filtering and minimum point constraint voxel filtering; step 3, realizing pin hole position degree detection based on an improved RANSAC algorithm and two-dimensional boundary clustering, and fitting an end surface excircle and a pin hole circle to obtain the pin hole position degree; and step 4, realizing pin-end face perpendicularity detection through coarse registration and weighted ICP fine registration. The method is used for detecting the 3D morphology of the crankshaft.

The invention provides a manufacturing method of a compressor piston, the compressor piston comprises a hinge groove, the hinge groove comprises a hinge hole and a mounting opening communicated with the hinge hole, the hinge hole is used for being connected with a transmission piece to achieve eccentric rotation of the compressor piston and a crankshaft and achieve air compression, and the manufacturing method is characterized by comprising the steps that a piston body is machined; the piston body is of a cylinder structure. Cutting feed is conducted from the outer wall of the piston body, at least one time of linear cutting is conducted along the inner walls of the mounting opening and the hinge hole, the hinge hole and the mounting opening are obtained at the same time, and the diameter of the hinge hole ranges from 2.8 mm to 4 mm; the hinge hole and the mounting opening are finely ground; and performing surface treatment on the piston body to obtain the compressor piston. The problems that a hinge groove of an existing compressor piston is machined through drilling, high precision is difficult to achieve, the wall breaking technology is difficult, and the machining efficiency is low are solved.

The invention discloses a crankshaft marking machine, which relates to the technical field of marking machines and comprises a supporting seat, a mounting assembly is arranged at the top of the supporting seat, a rotating assembly for transferring a crankshaft is arranged on the mounting assembly, a supporting plate is fixedly connected to the top of one side of the supporting seat, and a laser marking machine for marking the crankshaft is arranged at the top of the supporting plate. A cleaning assembly for collecting sweeps generated in the marking process is arranged on one side of the laser marking machine. According to the crankshaft marking machine, under the elastic acting force of a third damping spring, an arc-shaped clamping block can be tightly attached to the surface of a crankshaft, stable clamping is achieved, the stability of the crankshaft in the marking process is guaranteed through the clamping mode, marking quality reduction caused by vibration or shaking is reduced, and marking reliability and safety are further improved; and the crankshaft can be effectively vibrated through reciprocating knocking of the knocking rod, so that tiny sweeps or molten metal particles generated in the laser marking process fall off from the marking groove, and a marking area is kept clean.

The servo valve comprises an outer shell, a valve assembly is arranged in the outer shell, the valve assembly is connected with a nested antler channel, and the nested antler channel is used for being connected with hydraulic equipment; the valve assembly comprises a rotary valve rod, a valve element and a valve sleeve, the axis of the rotary valve rod is perpendicular to the axis of the valve element, the valve element is coaxially and movably arranged in the valve sleeve, the bottom of the rotary valve rod is connected with a crankshaft, the crankshaft is sleeved with a first bearing, and the valve sleeve is arranged in the nested antler channel. A plurality of through holes used for being communicated with the nested antler channels are formed in the valve sleeve in the axial direction of the valve sleeve, a movable groove matched with the crankshaft is formed in the middle of the valve sleeve in the radial direction, a kidney-shaped mounting hole matched with the first bearing is formed in the valve element, and the length direction of the kidney-shaped mounting hole is perpendicular to the axial direction of the valve element. And at least one annular sleeve is fixedly arranged on the valve element and located on the two sides of the mounting hole in a sleeving mode, the annular sleeves are used for blocking the through holes in different positions, and the valve rod has the advantages that abrasion of the valve rod is reduced, and the service life is prolonged.

An internal combustion engine has a uniblock that defines a blind cylinder bore that terminates within the uniblock. A piston is inserted into the cylinder bore from a bottom end of the cylinder bore. Parallel first and second vertical planes extend along first and second lateral sides of the cylinder bore. A cylinder zone being defined between the first and second vertical planes. A crosshead is coupled to the piston. A first crankshaft has a first crankshaft axis that extends parallel to the first vertical plane and that is positioned outside of the cylinder zone. A second crankshaft has a second crankshaft axis that extends parallel to the second vertical plane and that is positioned outside of the cylinder zone. The first crankshaft is coupled to the crosshead with a first connecting rod and the second crankshaft is coupled to the crosshead with a second connecting rod.

The invention relates to the technical field of data processing, in particular to an engine running state monitoring method and system, and the method comprises the steps: obtaining a vibration signal and a crankshaft rotating speed signal of an engine in real time, and converting the vibration signal from a time domain to an angle domain by taking the crankshaft rotating speed signal as a reference; performing order spectrum analysis on the vibration signal in the angle domain to generate a real-time order spectrum, and comparing the real-time order spectrum with a reference order spectrum to determine the energy deviation of each order; meanwhile, extracting waveform segments of each order in a plurality of continuous periodic vibration signals, and calculating the similarity between the waveform segments so as to evaluate the morphological dispersion degree and quantify the morphological stability degree; and finally, the energy deviation and the form stability degree are fused, the comprehensive fault risk index of each order is determined, and the operation state of the engine is monitored based on the comprehensive fault risk index of each order. The method improves the accuracy and reliability of engine state monitoring.

The utility model belongs to the technical field of compressors, and discloses a rotary compressor which comprises a shell, an air cylinder and a motor, the shell is provided with an inner cavity, the air cylinder and the motor are both arranged in the inner cavity, the air cylinder is provided with a compression cavity, a piston is arranged in the compression cavity, blades penetrate through the air cylinder, stretch into the compression cavity and abut against the piston, and the motor comprises a stator, a rotor and a crankshaft. The crankshaft comprises a shaft part and an eccentric part, the shaft part is fixed in the rotor, and the eccentric part is inserted into the piston; the value range of the outer diameter of the stator is 66-108 mm, the value range of the ratio of the height of the blades to the outer diameter of the stator is 0.12-0.304, the value range of the ratio of the eccentricity of the crankshaft to the outer diameter of the stator is 0.0105-0.0738, and the value range of the volume of the stator is 81-522 cm < 3 >. On the premise that the refrigeration effect of the compressor is guaranteed, the size of the compressor is further reduced, the total weight is reduced, and the cold-to-weight ratio of the compressor is effectively increased.

A powered ratchet tool includes a housing and a motor disposed within the housing. The motor has an output shaft rotatable about a first axis. The powered ratchet tool further includes a ratchet mechanism supported by the housing and operably coupled to the output shaft to be driven by the motor. The ratchet mechanism has a crankshaft assembly defining a variable crank radius configured to change an extent of each rotational stroke of the ratchet mechanism. Moreover, the powered ratchet tool includes an output drive operably coupled to the ratchet mechanism to be rotated about a second axis perpendicular to the first axis.

The invention relates to a crankshaft surface defect detection system based on machine vision in the field of detection equipment, which is characterized in that a movement mechanism comprising a swinging assembly, a rotating assembly and a transverse moving assembly is arranged to transversely shoot and circumferentially shoot a crankshaft belonging to an axial complex polyhedron, so that a comprehensive defect detection image is obtained, and the defect omission ratio is reduced; meanwhile, when the defects are identified and positioned, rough positioning of the surface defects is obtained through transverse comprehensive shooting, then independent circumferential shooting is carried out on the recorded surface defects to obtain circumferential shooting images of the surface defects, and further identification and positioning are carried out on the surface defects; more accurate defect feature information and defect accurate positioning information are obtained, the accuracy of defect judgment is improved, and the accurate detection time is saved; in addition, through accurate defect positioning information, a marking mechanism is started to carry out marking pigment injection on the defects, and subsequent manual subsequent confirmation and corresponding treatment are facilitated.

The invention discloses an automobile engine which comprises an engine body, a crankshaft and an air conditioner generator. The air conditioner generator comprises a stator and a rotor and is placed on the front portion of the automobile engine and driven by the crankshaft of the automobile engine, and the axis of the stator of the air conditioner generator is coaxial to the axis of a main shaft neck of the crankshaft of the automobile engine. The automobile engine can supply power to vehicle-mounted air conditioner systems, and the air conditioner generator is arranged at the front end of the crankshaft of the automobile engine. The automobile engine requires no belt for driving and is simple in structure and convenient for the vehicle-mounted air conditioner system to adopt the whole distribution structure.

The utility model belongs to the technical field of tractors, and particularly relates to a tractor combined motor gearbox assembly which comprises a gearbox body, a generator and a driving motor are coaxially arranged on the side wall of the gearbox body, the outer end of an input shaft of the generator is in transmission connection with the crankshaft output end of an engine, and an input shaft is supported on the gearbox body. The input shaft is a hollow shaft, one end of the PTO shaft axially penetrates through the output shaft of the driving motor and is connected with a spline at the inner end of the input shaft of the generator, the other end of the PTO shaft is supported in an inner hole of the input shaft through a lining, the input shaft is connected with the inner end of the output shaft of the driving motor through a spline sleeve, and the gearbox body supports the output shaft. A gear transmission assembly is arranged between the input shaft and the output shaft. The PTO shaft is directly connected with the output shaft of the engine, the engine provides power for the generator to provide electric energy for the driving motor, then the driving motor provides power for the gearbox assembly, the operation requirement of the tractor is met, and stepless speed change can be achieved.

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention relates to an eccentric Tamping probe that belongs to the field of Geotechnical Engineering and provides mechanical improvement along lateral direction of the soil at the desired depth, especially in loose and medium dense granular grain dominated soils with insufficient bearing capacity or excessive settlements in the natural state. The eccentric tamping probe of the invention, which provides mechanical improvement by compacting the soil in a lateral direction when attached to a standard drilling machine or engine, comprises an eccentric crankshaft (2), wing fasteners (8), ramming wings (4), a central distributor (9), a main frame (7), a drilling bit (1), and a protective fabric.

The compressor comprises a shell, a pump body assembly and a motor, the pump body assembly is arranged in the shell, a stator assembly of the motor is fixedly connected with the inner wall of the circumferential shell, and a rotor assembly of the motor is located in an annular space of the stator assembly and connected with a crankshaft. The oil baffle cap is located at the uppermost end of the rotor assembly and can conduct oil-gas separation on mixed gas from the pump body assembly. The height of the flanging structure of the oil baffle cap is h, the height between the upper end face of the circumferential shell and the upper end face of the stator core in the vertical direction is the height H of an upper cavity of the shell, and the nominal working volume of the compressor is V. According to the compressor, the value of H * h / V is reasonably set to be within the range of (0.97-3.53) * 10 <-2 > mm <-1 >, the flowing resistance of airflow and the separation efficiency of lubricating oil can be balanced, and the working efficiency of the compressor is improved. Therefore, the operation performance and reliability of the compressor are improved, meanwhile, the situation that the size of the compressor is too large is avoided, and the compact design of the compressor structure is facilitated.

The utility model relates to a universal type vertical numerical control single-face grinding machine which comprises a machine frame, a workbench, a first driving motor and a third driving motor, the third driving motor is connected with a grinding assembly, and a product placing structure is arranged on the workbench and located below the grinding assembly. A second driving motor is arranged on the rack below the workbench; a turntable capable of rotating along with the motor shaft part of the second driving motor is arranged on the motor shaft part; a placement groove is formed in the workbench; the turntable can rotate in the placement groove; a crankshaft part of the second driving motor is connected with the turntable; a feeding device is arranged at the position, above the feeding end of the rotary disc, of the rack; a group of placement through holes matched with products to be processed in shape are formed in the rotary table, and the placement through holes are matched with the groove bottom of the placement groove to form a placement area for placing the products to be processed; a feeding device is arranged at the position, above the feeding end of the rotary disc, of the rack; and the feeding device is matched with the placement through hole. The grinding machine can effectively solve the problems that an existing grinding machine is complex and poor in general applicability.

The invention relates to a device (19) for a muscle-powered vehicle (20), comprising an electric machine (8) with a rotor shaft (8.1), a gear (4) with at least one first helical gear (5) and a second helical gear (7) which mesh with one another, a pedal crankshaft (9) and a housing (10) for accommodating the electric machine (8), the gear (4) and essentially also the pedal crankshaft (9), wherein the first gear (5) is arranged on the pedal crankshaft (9) in a torque-transmitting manner, wherein the second gear (7) is arranged on the rotor shaft (8.1) in a torque-transmitting manner.1), wherein one of the two gearwheels (5, 7) is arranged to be axially displaceable and the other of the two gearwheels (7, 5) is arranged to support axial force, wherein at least one first friction surface (3) is arranged on at least one end face of the axially displaceable gearwheel (5), which is assigned to at least one second, stationary friction surface (2), so that when the pedal crankshaft (9) is driven in the direction of travel of the vehicle (20), the axially displaceable gearwheel (5) is displaced axially in such a way that the two friction surfaces (3, 2) come into contact and generate a friction torque.

The invention provides a self-lubricating crankshaft and refrigeration equipment, and relates to the field of refrigeration equipment, an annular concave main shaft oil storage groove is formed by main shaft part sections where oil storage section oil grooves are distributed, the oil storage space is increased, and the lead of the oil storage section oil grooves is smaller than that of other sections of spiral oil grooves, so that the speed of refrigerating machine oil is slower during backflow; the eccentric oil storage groove formed in the end face of the connecting rod shaft is communicated with the eccentric section oil groove through the oil outlet hole, the function of storing the refrigerating machine oil is achieved, and when restarting is conducted after shutdown, the stored refrigerating machine oil can be put into use rapidly and can be supplied to the eccentric part and the main shaft part in time to provide initial lubrication. Dry friction at the starting moment is reduced, the reliability of the crankshaft during starting is improved, and poor lubrication caused by insufficient oil supply is avoided.

According to the forest and fruit tree body profiling flapping fruit harvester based on the special-shaped crankshaft structure, transmission is achieved through special-shaped crankshafts with different crank throw eccentricity degrees, and the movement amplitude of flapping strips is limited through the inner side edges of amplitude limiting plates; the purpose that the flapping strips are arranged in a manner of imitating the contour of a tree crown can be achieved while the flapping strips are flapped, the flapping strips are arranged in a shape of imitating a tree shape, missed flapping of the top of the tree crown and the pole position of the symmetry axis is avoided, and the net picking rate of different positions is increased. The device comprises a chassis vehicle body and a tree-like flapping device, in the tree-like flapping device, a crankshaft with a plurality of crank throws is rotationally arranged on a base, and the eccentric distances of the crank throws are different; the lower end of each beating strip is hinged to a crank throw of the crankshaft; opposite amplitude limiting plates are arranged on the higher parts of the two sides of the base, and an amplitude limiting hole is formed between the opposite inner side edges of the two amplitude limiting plates; the distance between the inner side edges of the two amplitude limiting plates close to the center of the amplitude limiting plate in the direction parallel to the axial direction of the crankshaft is smaller than the distance between the inner side edges of the two amplitude limiting plates close to the two ends of the amplitude limiting plate.

The invention relates to crankshaft outer circle and end face integrated grinding equipment and a grinding method, and relates to the field of grinding equipment. According to the technical scheme, a single grinding machine is used for replacing three grinding machines in the original process, equipment investment is greatly reduced, labor and energy consumption are saved, the production efficiency is improved due to process concentration, and meanwhile the problems that an existing process is large in occupied area and large in labor consumption are solved; the outer circle and the end face of the crankshaft part can be synchronously ground through one-time clamping, positioning errors caused by multiple times of clamping are avoided, a numerical control system can conveniently monitor and compensate machining errors in real time, and the high-precision requirement is guaranteed. Specifically, a grinding wheel spindle is matched with an axial driving assembly to achieve synchronous grinding of the outer circle and the end face of the crankshaft. Diamond needles are welded to the outer circle and the side face of the grinding wheel dressing diamond roller in a buried mode, and dressing of the outer circles of a fixed grinding wheel and a movable grinding wheel and the end face of the movable grinding wheel can be completed. A metal guide wheel is selected to support a crankshaft spiral groove face, guide wheel abrasion is reduced, and grinding precision and efficiency are further guaranteed.

The invention discloses a variable speed brushless motor methanol pump, comprising a methanol pump and a brushless motor, wherein the brushless motor is integrated in the methanol pump and drives the methanol pump to work, the control board of the brushless motor is integrated in the methanol pump to control the brushless motor to work, and the output end of the brushless motor drives the rotating parts of the methanol pump to work; an oil outlet connector, an oil inlet connector and a connector are provided on the methanol pump, the connector is electrically connected to the control board of the brushless motor, the control board is connected to the engine crankshaft signal, and the engine crankshaft signal is converted to control the rotation of the brushless motor; or the control board is connected to the ECU using a CAN communication method to send a signal, and the ECU uses a CAN communication method to send a signal to control the rotation of the brushless motor. The invention can make the oil delivery pump change the output flow and pressure, and maintain a relatively high pressure of 12 bar to weaken the pipeline-level fuel filter resistance, which can meet the requirements of the injection pump with large flow.