32 results about "Herringbone gear" patented technology

The application discloses a machining method of a double herringbone gear shaft, which comprises the following steps: S1, machining gear shaft tooth blank: the center distance error of two herringbone gear hollow grooves is not more than ±0.05mm; the tooth width size error of the two herringbone gears is controlled to be within ±0.03mm; S2, machining reference hole: one reference hole with a diameter of 20mm is machined on each end of the gear shaft neck, and the symmetry error of the two reference holes is not more than 0.01mm; S3, gear milling: the gear shaft is clamped on a numerical control gear milling machine, and the error is not more than 0.02mm after the gear shaft outer circle is measured and aligned; one end of the herringbone gear is machined first, the gear shaft is clamped and aligned again after the machining is completed, and the other end of the herringbone gear is machined. The machining method is convenient to install and adjust, the phase precision of the two herringbone gears is high, the error can be controlled within 0.02mm, the transmission precision of a mechanical press can be met, and the machining precision is stable and reliable.

The application discloses a kind of bidirectional plug cutting herringbone gear cutting methods, system and medium, cutting methods include the following steps: A1, first plug gear cutter and second plug gear cutter are installed on plug gear cutter bar, the rake face K1 of the first plug gear cutter and the rake face K2 of second plug gear cutter are oppositely arranged, the distance between the rake face K2 of the second plug gear cutter and the back end surface of the first plug gear cutter is h, satisfy h ≥ L+10, L is plug gear stroke length;A2, determine the cutting parameters of upper helical gear and lower helical gear of herringbone gear;A3, call the numerical control system and programming module of plug gear machine, using second plug gear cutter, first plug gear cutter respectively on upper helical gear, lower helical gear is inserted and cut, and the plug cutting direction of second plug gear cutter and first plug gear cutter is opposite.Solve the technical problem that one direction is used for plug cutting when existing plug cutting is processed, it is difficult to reach the requirement of high symmetry error, the application has the advantages of high product symmetry precision and high production efficiency.

The utility model discloses a horizontal scraper discharging centrifugal machine with large handling capacity, which comprises a driving motor for providing power for the centrifugal machine, and the driving motor comprises a stator and a rotor; the transmission device adopts a herringbone toothed belt wheel structure; the screen basket is used for centrifugally separating materials, and solid-liquid separation of the materials is achieved through centrifugal force generated by rotating the screen basket at a high speed; the scraper adopts a small-lead spiral blade design, and the small-lead spiral blade enables the scraper to scrape materials on the inner wall of the screen basket when the scraper rotates along with the screen basket; a feeding pipe of the feeding system is a circular pipeline, the inlet end of the feeding pipe is connected with the material conveying pipeline, and the outlet end of the feeding pipe is arranged on one side of the screening basket in the tangential direction. According to the centrifugal machine, the problems of handling capacity, transmission stability, feeding mode, maintenance convenience, part protection, environmental adaptability and the like of vertical and horizontal centrifugal machines in the prior art are solved.

The invention relates to the technical field of mechanical engineering, discloses a herringbone gear planetary gear train inherent characteristic analysis method considering gear ring flexibility, and aims to solve the problem that in the prior art, flexible structure characteristics of an inner gear ring are neglected, so that an analysis result is inaccurate during herringbone gear planetary gear train inherent characteristic analysis. When the inner gear ring is modeled, the inner gear ring is discretized into a plurality of sections of uniformly bent gear ring micro-section units, and the motion differential equation of the inner gear ring is constructed through modeling, so that the flexibility characteristic of the inner gear ring is fully considered when the motion differential equation set of the herringbone gear planetary transmission system is constructed; and a more accurate data basis is provided for subsequent solidity analysis. In addition, the structural characteristics of the herringbone gear are considered, the herringbone gear is divided into the left side and the right side for modeling operation, the accuracy of data needed by calculation is improved, and more practical and more accurate inherent characteristic analysis of the herringbone gear planetary transmission system is achieved.

The invention belongs to the technical field of herringbone tooth assembly, and discloses an assembly tool and method for herringbone teeth of a helicopter main speed reducer, and the assembly tool comprises a tool lifting appliance frame, a herringbone gear grabbing assembly tool, a small herringbone gear positioning tool and a herringbone tooth assembly rack. Large herringbone teeth are positioned through the central station of the herringbone tooth assembly rack, two small herringbone teeth are automatically pushed and accurately meshed with the large herringbone teeth through the small herringbone gear positioning tool, and the problem of addendum circle interference in herringbone tooth assembly is effectively solved. And then, the herringbone gear grabbing and assembling tool clamps the three engaged gears at the same time to form a whole, and the whole is transferred and installed to the main speed reducer through the tool lifting tool frame. High-precision and high-efficiency integrated assembly of the herringbone gear set is achieved, the assembly quality and consistency are guaranteed, and the automation level and the production efficiency are remarkably improved.

The invention discloses a herringbone tooth and a herringbone tooth machining method. The herringbone tooth comprises a first gear, a second gear and a fastening assembly. A first convex part is arranged on the end surface of the first gear; the second gear is detachably connected with the first gear, and the rotating direction of the second gear is opposite to that of the first gear; a groove is formed in the end face of the second gear, and the first protruding part can be inserted into the groove in the mode of rotating around the groove. The fastening assembly is connected with the first gear and the second gear and used for limiting relative rotation of the first gear and the second gear. And the first gear and the second gear can be respectively assembled after being generated, so that the production difficulty is reduced. Moreover, the first convex part is matched with the groove to limit the relative movement of the first gear and the second gear in the radial direction, so that the first gear and the second gear can rotate relatively, and the alignment of the tooth shapes of the first gear and the second gear is facilitated.

The application discloses a phase-adjustable combined staggered herringbone gear planetary gear train transmission, which comprises a primary sun gear assembly, a secondary sun gear assembly, a primary long planetary gear assembly, a secondary short planetary gear assembly, a primary inner gear ring assembly, a secondary inner gear ring assembly and a planet carrier assembly; all the gears are staggered herringbone gears; one primary planetary gear is engaged with the primary sun gear and the primary inner gear ring, and the other primary planetary gear is engaged with the secondary planetary gear and the secondary inner gear ring; the secondary planetary gear is engaged with the secondary sun gear; the primary sun gear assembly, the secondary sun gear assembly and the primary inner gear ring assembly are different gear input ends, and the planet carrier assembly is an output end. The application reduces the amplitude of the engagement stiffness fluctuation and the engagement impact in the engagement process by adjusting the phase of the herringbone gear, reduces vibration and noise, improves the load sharing characteristics of the planetary gear train through the floating installation of the elastic pin shaft and the planetary gear, and is suitable for high-speed heavy-load working conditions.

The invention belongs to the technical field of speed reducers, and particularly relates to a speed reduction motor structure and an assembling method thereof. The speed reduction motor structure comprises a bottom shell, a stator, a rotor, an upper cover, an inner gear ring, a coupler, a sun gear, a planet carrier and a planet gear; the bottom shell comprises a barrel shell and a bottom plate, a first bearing is arranged on the bottom plate, a mounting part is arranged on the inner side of the rotor, and a connecting part is arranged on the bottom side of the mounting part; a first shaft of the sun gear is connected with the mounting part, and the coupler is rotationally connected to a second shaft; a plurality of planet shafts are arranged on the bottom side of the coupler at equal angles, the lower ends of the planet shafts are connected with a planet carrier, each planet shaft is rotationally sleeved with a planet gear, and the planet gears and the sun gear are herringbone gears meshed with each other; the upper cover is provided with a supporting ring extending downwards to the inner ring of the rotor, the inner gear ring comprises a first gear ring and a second gear ring, first inner teeth are arranged in the first gear ring, second inner teeth are arranged in the second gear ring, and the first inner teeth and the second inner teeth are combined into herringbone teeth and meshed with the planetary gear; the outer diameter of the planet carrier is smaller than the inner diameter of the inner gear ring.

The utility model discloses a kind of reducer of radial force double support output structure, including reducer body, the bottom of reducer body is fixedly connected with base, the front end center of reducer body is equipped with opening, and opening place protrudes with the shaft lever that can rotate, the front of reducer body is equipped with output mechanism, output mechanism includes box, and the front end of reducer body is fixedly connected with the rear end of box;By setting two groups of herringbone gear structure, since the axial force and radial force of bearing exist mechanical coupling relationship, therefore herringbone gear can indirectly affect the balance of radial force through its symmetric design, the axial force generated by its double helix structure can be mutually cancelled out, to reduce the axial load of bearing, the balance of this axial force indirectly reduces the stress pressure of radial bearing, to reach the effect of resisting radial force, not only further improve the service life of reducer, while also improve the stability of bearing overall structure.

The application provides a herringbone gear pump and a use method thereof. The herringbone gear pump comprises a herringbone gear pump body, a filter device is fixedly installed at a liquid inlet of the herringbone gear pump body, the filter device comprises a filter box, a filter plate is slidably installed in the filter box, a vertical seat is fixedly installed on the inner wall of the bottom of the filter box, the bottom of the filter plate is in contact with the top of the vertical seat, an upper sealing plate is fixedly installed on the top of the filter plate, the upper sealing plate is fixedly connected with the filter box, a collecting box is slidably installed in the filter box, a lower sealing plate is fixedly installed on the bottom of the collecting box, and two groups of abutting mechanisms are arranged on the bottom of the filter box. The herringbone gear pump has the advantages that impurities in liquid can be filtered, the filtered impurities can be collected, the operation amount of impurity cleaning is small, and the herringbone gear pump does not need to be stopped during the impurity cleaning.

This invention discloses a plunger pump power end and a plunger pump having the same. The plunger pump power end includes a first-stage transmission assembly and a second-stage transmission assembly. The first-stage transmission assembly includes a first transmission member and a second transmission member, which mesh with each other. The rotation direction of the first transmission member is parallel to the rotation direction of the second transmission member. The second-stage transmission assembly includes a connected herringbone gear assembly and a crankshaft, with the herringbone gear assembly meshing with the second transmission member. The plunger pump power end of this invention has advantages such as long service life and ease of design and manufacturing.

The utility model relates to the technical field of bridge confluence structures, and discloses a high-strength double-motor bridge confluence structure which comprises a gearbox body, a right motor is arranged outside the gearbox body, a left motor is arranged outside the gearbox body, and a main rotating shaft is movably sleeved with the gearbox body. A herringbone gear movably sleeves the outer part of the main rotating shaft, the outer part of the herringbone gear is meshed with a right motor gear, and the outer part of the herringbone gear is movably meshed with a left motor gear; according to the utility model, the right motor and the left motor are arranged, and the right motor gear and the left motor gear which are independently driven and symmetrically arranged can be simultaneously meshed with herringbone teeth outside the main rotating shaft, so that unevenness of loads can be adjusted to a certain extent by generated opposite axial forces, and the loads output by the motors tend to be consistent; and the power converged by the herringbone teeth is transmitted to the tires through the gearbox, so that the use experience of the equipment is optimized.

The invention relates to the technical field of herringbone gear shaft assembly, and discloses a split type herringbone gear shaft machining assembly and centering adjustment method which comprises the steps that A, one end face of a first gear is selected and marked as a first gear reference end face; one end face of a second gear is selected and marked as a second gear reference end face; b, the first gear and the gear shaft are baked; c, a datum line is marked on the first gear, the datum line extends in the axial direction, and an alignment line is correspondingly marked on the gear shaft; d, the second gear and the gear shaft in the step C are baked; e, the matched herringbone gear shaft and the split herringbone gear shaft in the step D are arranged in the box body; and F, centering adjustment is conducted on the split herringbone gear shaft. The invention aims to provide the processing, assembling and centering adjusting method for the split herringbone gear shaft so as to ensure that the split herringbone gear shaft can meet the design centering requirement after being baked.

The application belongs to the technical field of beam pumping unit, in particular to a power unit of beam pumping unit, which comprises a main reducer, an auxiliary reducer, a permanent magnet synchronous motor and a motor frequency converter controller, the auxiliary reducer comprises an auxiliary reducer driven large gear and an auxiliary reducer driving small gear which are engaged with each other, the auxiliary reducer driven large gear is installed on the input shaft of the main reducer, and the auxiliary reducer driving small gear is installed on the motor shaft of the permanent magnet synchronous motor; the auxiliary reducer driven large gear comprises a hub, a gear ring and a plurality of shock absorbing springs, the gear ring is sleeved on the hub and is in clearance fit, a plurality of rectangular slots are uniformly distributed in the circumferential direction at the contact position of the hub and the gear, and the shock absorbing springs are installed in the rectangular slots in a compressed state; the auxiliary reducer driven large gear and the auxiliary reducer driving small gear are both herringbone gears. The application has high transmission efficiency, high reliability, continuous adjustable pumping unit stroke, and can meet the needs of matching with full series of beam pumping units.

The invention belongs to the technical field of misplacement angle measurement of misplacement herringbone gears, and particularly relates to a method for measuring a misplacement angle of a narrow-clearance misplacement herringbone gear, which comprises the following steps of: fixing a gear on a working table of a tooth measuring machine by using an adaptive tool and positioning the gear; inputting gear design parameters, and scanning and acquiring end face coordinates of the gear and the clearance groove to construct a central plane; unfolding the gear into a rectangle along the reference circle, and constructing a plane coordinate system taking the central plane projection of the clearance groove and the axis projection of the gear as coordinate axes; measuring the projection curve of the spiral line tooth by tooth, extending the spiral line, fitting the obtained intersection points into a straight line, and calculating the distance delta Z between the straight line and the coordinate axis; and substituting into a specific formula to calculate an actual dislocation angle theta, and comparing with a design value to detect deviation. The method is suitable for measuring the manufacturing precision of a specific herringbone gear, the dislocation angle measuring precision can be greatly improved, the deviation is accurately controlled, and the transmission performance is guaranteed.

The invention belongs to the technical field of aviation gear machining and the field of grinding processes, and relates to an aviation staggered herringbone gear grinding process parameter design method. The staggered herringbone gear comprises a left bevel gear, a middle clearance groove and a right bevel gear; the left helical gear and the right helical gear have the same helical angle beta and normal modulus mn, and the left helical gear and the right helical gear are staggered by a staggered angle theta; the method comprises the following steps: 1, calculating a judgment parameter K according to a judgment formula; 2, whether the value of the parameter K is in a first value range (Ka, Kb) or not is judged, and if yes, it is judged that borrowing grinding can be conducted, and the grinding wheel can obtain the maximum diameter Dmax; otherwise, determining non-borrowing grinding; and 3, the maximum diameter Dmax of the grinding wheel is calculated.

This application provides an in-situ measurement method and device for the circumferential machining compensation amount of herringbone gear teeth phase. Based on the machining concept of quantitative compensation, this invention improves the axial phase accuracy of herringbone gear teeth during the machining process. After machining the cylindrical helical gear teeth at one end of the herringbone gear, the cylindrical helical gear teeth at the other end are machined step by step, and the circumferential phase error of the two cylindrical helical gears at both ends is quantitatively obtained between processes, providing quantitative parameters for machining compensation. The provided measurement device can measure the phase deviation of the herringbone gear teeth without mechanically damaging the herringbone gear and without the herringbone gear leaving the machining position, thus reducing the systematic error in the machining of herringbone gears.

This invention discloses a highly adaptable herringbone gear reducer with hardened tooth surfaces. The large gear includes a left-hand sector-shaped half-gear ring and a right-hand sector-shaped half-gear ring. The meshing surfaces of the left-hand and right-hand sector-shaped half-gear rings and the hub boss of the wheel hub are both planar structures with micron-level anti-slip textures. The double-arc herringbone gear formed by the left-hand and right-hand sector-shaped half-gear rings is staggered by half a tooth pitch along the axial direction, and the tooth surface adopts a double-crown modified tooth surface. During assembly, the left-hand and right-hand sector-shaped half-gear rings and the hub boss are coaxially positioned. The meshing surfaces are coated with anaerobic liquid oxygen adhesive and radially combined and cured. After curing, through-hole screw holes and pin holes are machined on the gear rings and the hub boss, and double fixing is achieved by screws and pins. This invention solves the problems of high processing difficulty, insufficient assembly accuracy and connection reliability, poor adaptability of lubrication system, and uneven tooth surface load distribution in existing hardened herringbone gear reducers.

The invention provides a decoupling method for axial deformation generated by residual stress of herringbone gear cutting and heat treatment, and belongs to the field of mechanical manufacturing processes, computer-aided simulation and digital twinning. The method is characterized by comprising the following steps: establishing a cutting process and heat treatment collaborative deformation simulation model; analyzing residual stress distribution and a deformation mechanism in the whole process of blank heat treatment, machining, carburizing heat treatment and the like; obtaining surface residual stress and depth distribution functions under different cutting parameters through orthogonal cutting simulation; designing an experiment, extracting a simulation correction coefficient, a deformation constant and a heat treatment correction coefficient of cutting regeneration stress, and eliminating interference of residual stress of preheat treatment; and deformation prediction and process optimization of a full variable space are realized through a digital twinning technology. The method solves the problem that the cutting regeneration residual stress is difficult to directly observe, obviously improves the machining precision prediction capability, reduces the experiment cost, and is suitable for the field of manufacturing of parts sensitive to residual stress, such as precision gears and thin-wall parts.

The invention relates to the technical field of fluid conveying, in particular to a double-rotation-direction high-pressure spiral gear pump which comprises a shell, a driving gear shaft and a driven gear shaft which are parallel and meshed with each other are arranged in the shell in a penetrating mode, symmetrical oil ports are formed in the two sides of the shell, oil pumping ports correspond to the meshed positions of the gear shafts, and arc herringbone gears are arranged on the two shafts; one end of a driving gear shaft penetrates through the front end cover and is close to the front end cover to rotate rightwards in a half-side helical tooth mode, the calibers of two oil ports are different, the end cover is provided with a 3-shaped oil groove, a pressure adjusting hole and the like, the floating bush is provided with a pressure adjusting channel, the 3-shaped oil groove is of a specific structure, and the end cover is further provided with a sealing groove and a sealing ring. An oil seal is arranged between the driving gear shaft and the front end cover. According to the gear pump, the structural design of the gear pump is optimized, the working performance and stability of the gear pump are improved, and the efficient fluid conveying effect is achieved.

The application discloses a herringbone gear hobbing cutter, which comprises a hobbing cutter bar and hobs, the hobs are installed on the hobbing cutter bar, the hobs comprise first hobs and second hobs, the hobbing cutter bar is provided with an installation part, the first hobs and the second hobs are respectively installed on both ends of the installation part, the axial distance between the first hobs and the second hobs is L0, the stroke length of the herringbone gear is L, and L0 is greater than or equal to L, and the initial cutting teeth of the first hobs and the second hobs are located at the same angular position on the hobbing cutter bar. The application overcomes the single machining characteristic of the existing hobbing cutter, and ensures the high-precision manufacturing of the symmetry error of the intersection points of the helical lines of the two helical gears of the herringbone gear.

The utility model belongs to the technical field of herringbone gears, and particularly discloses a herringbone gear with an oil storage cavity, which comprises a middle part, a first rotating shaft is arranged in the middle part, a plurality of bumps are annularly arranged on two sides of the first rotating shaft, and a plurality of grooves are annularly arranged on two sides of the first rotating shaft among the bumps. A plurality of connecting columns are fixed to the side face of the first rotating shaft, a through hole is formed in the end, away from the first rotating shaft, of each connecting column, a plurality of first triangular blocks are fixed to the inner side wall of the middle part between the through holes, annular grooves are formed in the two sides of the middle part of each first triangular block, and a plurality of circular grooves are annularly and evenly distributed in the two sides of the middle part beside each annular groove; gaskets are attached to the two sides, beside the circular grooves, of the middle part, a right part and a left part are attached to the sides, away from the middle part, of the gaskets, the left part and the right part are symmetrical, a plurality of circular grooves are annularly formed in one side of the left part, annular grooves are formed in the positions, beside the circular grooves, of the left part, and a plurality of second triangular blocks are fixed to the positions, beside the annular grooves, of the inner wall of the left part.

The invention provides a parallel-axis involute variable-tooth-thickness herringbone gear transmission mechanism and a design method.The parallel-axis involute variable-tooth-thickness herringbone gear transmission mechanism comprises a first involute variable-tooth-thickness herringbone gear and a second involute variable-tooth-thickness herringbone gear which are meshed with each other, and the first involute variable-tooth-thickness herringbone gear is rotationally installed in a transmission box body through a first main shaft; the second involute variable-tooth-thickness herringbone gear is rotationally mounted in the transmission box body through a second main shaft; the axes of the first spindle and the second spindle are parallel. While inheriting the transmission advantage of the thickened gear, the herringbone gear arrangement is adopted, so that the bearing capacity is increased, the axial thrust is eliminated, the structure is more compact, and the transmission is more stable.

The invention relates to the technical field of gear transmission, and discloses a double-radial-plate herringbone gear structure and a mounting method.The gear structure comprises a gear shaft, an upper radial plate, a lower radial plate and a gear ring, a flange is arranged on the periphery of the gear shaft, and the ends, close to the gear shaft, of the lower radial plate and the upper radial plate are symmetrically arranged along the two sides of the flange; and one ends, far away from the gear shaft, of the lower radial plate and the upper radial plate are connected with two groups of mounting edges of the gear ring through step outer circles. From the aspect of structure, the gear ring part and the wheel disk part of the herringbone gear are separately designed and machined and are connected through the connecting piece, so that the wheel disk part and the gear ring part of the gear form a stable triangular supporting structure, the structural stability is better, and the operation stability of a gear pair is improved; meanwhile, the gear shaft, the radial plate and the gear ring are made of different materials, and the radial plate is made of titanium alloy or composite materials, so that the overall weight of the gear is lighter, the power density of a helicopter speed reducer is improved, and the advancement of products is guaranteed.

The invention discloses a machine tool structure for machining internal herringbone teeth, and relates to the technical field of gear machining. The internal tooth machining device comprises a machine tool feeding mechanism, an internal tooth machining mechanism and a workbench, wherein the workbench is arranged on one side of the machine tool feeding mechanism. The internal tooth machining mechanism is matched with the X-axis feeding assembly, the Y-axis feeding assembly and the Z-axis feeding assembly in the machine tool feeding mechanism to be in linkage with the C-axis rotating assembly in the workbench, overall forming machining of the double-spiral tooth face of the large-specification clearance-groove-free internal tooth herringbone tooth gear ring can be achieved, and the internal tooth herringbone tooth machining and assembling procedures are reduced; a workpiece is horizontally placed above the workbench and is clamped and fixed once through a clamp, the workpiece clamping efficiency is improved, the structure has high rigidity, high-precision machining of internal tooth herringbone tooth workpieces of various specifications can be achieved by being matched with machine tool feeding mechanisms of different specifications and finger-shaped milling cutters of different specifications, the application range is wide, and the machining precision is high. And the blank of integrally processing the inner tooth herringbone tooth structure by the finger-shaped milling cutter is filled.

The invention provides a herringbone gear tooth surface contact temperature prediction method based on thermal elastohydrodynamic lubrication, and the method comprises the steps: S1, determining the load distribution of a herringbone gear tooth surface, and determining the Hertz contact half width according to the load distribution of the herringbone gear tooth surface; s2, determining a micro-bulge sharing pressure and a fluid sharing pressure of the herringbone gear based on the Hertz contact half width, and then determining a tooth surface friction heat flux density equation of the herringbone gear; s3, determining boundary conditions of the herringbone gear, and establishing a heat transfer balance equation; s4, inputting the heat transfer balance equation, the boundary conditions and the simulation parameters of the herringbone gear into a finite element model, iteratively calculating the temperature of a herringbone gear body by the finite element model, and judging whether the temperature of the herringbone gear reaches a convergence condition or not, if so, entering step S5, and if not, returning to step S2; and S5, determining the tooth surface flash temperature of the herringbone gear, and taking the sum of the tooth surface flash temperature of the herringbone gear and the temperature of the herringbone gear body as a tooth surface contact temperature prediction result of the herringbone gear.

The utility model provides a herringbone tooth turning cutter, and belongs to the field of turning cutters. The utility model relates to a tooth turning cutter which solves the problems that heat is generated in the operation process of the tooth turning cutter, the abrasion resistance is possibly reduced due to overheating, and metal chips and other impurities are possibly generated in the machining process to influence the machining accuracy. A bearing used for connection is arranged between the tool bit and the disc, an annular notch is formed in the tool bit, an air inlet pipeline is arranged on the disc, first limiting rings are arranged on the two sides of the air inlet pipeline located in the notch, a second limiting ring is arranged on the tool bit, a groove channel is formed between the second limiting ring and the tool bit, and the groove channel is communicated with the groove channel. An annular air guide groove matched with the air inlet pipeline is formed in the tool bit, a plurality of air guide pipes are arranged below the air guide groove, and a plurality of air outlet pipes extending to the blade are arranged on the air guide pipes.

This invention relates to the field of aerospace and ship gear transmission technology, specifically to a long-cycle multi-source excitation calculation method for herringbone gears considering asymmetric pitch deviation. Based on the gear generating principle, the theoretical tooth surface equations of the large and small gears are derived. The small gear undergoes bidirectional modification to obtain the position and normal vector of its modified tooth surface. The geometric contact analysis of the herringbone gear is decomposed into independent analyses of the left and right helical gear pairs. A TCA model is established and solved to obtain the tooth surface contact trajectory, initial tooth surface clearance, and geometric transmission error. Displacement compatibility conditions and axial force equality constraint equations are constructed. An improved load-bearing contact analysis model is established and solved using an improved simplex method. Iterative solutions yield the comprehensive meshing stiffness, axial runout, and comprehensive meshing error over the long cycle. This invention achieves differentiated and accurate calculation of the excitation in each meshing cycle of the herringbone gear over the long cycle, quantifies the axial runout excitation, and obtains multi-source excitation in one go, providing a complete vibration excitation input for the dynamic model of the herringbone gear transmission system.

This utility model relates to a balancing gear device in the field of gear technology, including a hub and a gear disposed on the outer ring surface of the hub. A diaphragm assembly, a flange, and a cover are coaxially arranged on the inner side of the hub. The diaphragm assembly is composed of multiple layers of stacked elastic diaphragms. The outer edge of the diaphragm assembly is connected to the hub by at least one ring of fasteners, and the inner edge is clamped between the flange and the cover to form a rigid connection area. The cover fixes the diaphragm assembly through a three-stage connection structure. For gear operation in high-speed reducers, this utility model utilizes the excellent self-balancing ability of the herringbone gear itself and the balancing gear device to counteract the unbalanced force caused by uneven gear mass or assembly errors, reducing vibration and noise. After balancing, gear meshing is smoother, effectively increasing transmission accuracy and stability. With reduced vibration, the frictional resistance between gear meshing and bearings decreases, further increasing transmission efficiency.

The utility model discloses a reciprocating pump crankshaft axial limiting connecting mechanism based on a reduction gearbox planet carrier, which comprises a reduction gearbox planet carrier, an output external spline is arranged on the outer side of the reduction gearbox planet carrier, a threaded hole is processed at the end part of the output external spline, and a spigot is reserved at the tail part of the output external spline; the spline sleeve is arranged on the outer side of the output outer spline in a sleeving mode, and an inner spline matched with the output outer spline is machined in the spline sleeve; the pressing plate is connected with the threaded hole in the end part of the output external spline through a pressing plate bolt; one end of the power input side of the reciprocating pump crankshaft is fixedly connected with the spline housing, a plurality of process holes are formed in a first crankshaft neck of the power input side of the reciprocating pump crankshaft, and the process holes are used for allowing pressing plate bolts to penetrate through; axial movement gaps are reserved between the spline housing and the pressing plate and between the spline housing and the seam allowance. The axial bearing capacity of the planetary herringbone gear of the planetary reduction gearbox is utilized, the axial displacement of the crankshaft is limited through the planet carrier, no relative rotation motion exists between the planet carrier and the crankshaft, and the risks of high temperature and abrasion failure caused by relative friction are completely eradicated.