26 results about "Engine balance" patented technology

The utility model discloses a high-precision automobile engine balance weight which comprises a transmission ring, a bottom ring body, fixing columns, fixing holes, arc-shaped pieces, a counter weight frame, fixing pieces, adjusting notches, adjusting columns and adjusting blocks. The fixing holes are evenly formed in the top of the transmission ring, the fixing columns are connected into the fixing holes in a threaded fit mode, and the arc-shaped pieces are arranged on the arc-shaped pieces. The fixing columns are sleeved with through grooves evenly formed in the bottom ring body, and the bottom ring body is attached to the top of the transmission ring. During assembly, the fixing columns penetrate through the through grooves evenly formed in the bottom ring body and are connected into the fixing holes in the transmission ring in a matched mode, relative fixation of the transmission ring and the counter weight frame is achieved, the position of the counter weight structure relative to a transmission plane can be adjusted conveniently according to actual requirements, and the complex actual use requirements are met; the practicability of the balance block is improved; the centrifugal moment of the balance block can be adjusted by rotating the adjusting column under the condition that the rotating speed of the motor is not changed, and the universality of the balance block is improved.

The invention provides a balance mechanism and an engine, the balance mechanism comprises a balance shaft, the axial direction of the balance shaft is parallel to the axial direction of a crankshaft of a horizontally opposed two-cylinder engine; the axial direction of the crankshaft is parallel to or the same as the Y-axis direction; the two cylinders are located on the two sides of the crankshaft in the X-axis direction respectively and distributed in the Y-axis direction at intervals. The balance shaft is used for being connected with the crankshaft through the preset gear assembly, so that when the crankshaft rotates, the balance shaft is driven to rotate in the direction opposite to the rotating direction of the crankshaft at the same rotating speed; the balance assembly comprises a bevel gear assembly and a balance part, and the bevel gear assembly is connected with the balance shaft and the balance part, so that the rotating axis of the balance part is parallel to or the same as the Z-axis direction; the two balance assemblies are distributed in the axial direction of the balance shaft. The two balance parts are oppositely arranged in the X-axis direction, and the rotation directions of the two balance parts are opposite, so that the two balance parts generate force in the X-axis direction to balance the reciprocating inertia force of the two cylinders correspondingly.

The utility model discloses a forging die for a balance shaft of an engine, which comprises a lower die holder comprising a lower die block and a jacking block, the top surface of the lower die block is provided with a broken cavity, and the top surface of the jacking block is provided with a supporting through groove; an upper cavity is formed in the bottom surface of the upper die base; and the driving assembly is used for driving the upper mold base to move in the vertical direction, driving the lower mold base to move in the horizontal direction perpendicular to the length direction of the supporting through groove and driving the jacking block to move between the jacking position and the forming position so as to drive the upper mold base and the lower mold base to be switched among the mold closing state, the mold matching state and the mold splitting state. According to the forging die for the engine balance shaft, the relative positions of the upper die base and the lower die base are adjusted through the driving assembly, meanwhile, the positions of the lower die block and the jacking block in the lower die base can be adjusted, the contact area with a blank is increased through the supporting through grooves, and therefore the blank can be stably supported after forging is completed, collision of the blank is reduced, and the forging efficiency is improved. The later processing quality is ensured.

The utility model provides a motorcycle engine, and belongs to the technical field of motorcycles. The clutch electric actuator solves the problem of how to improve the balance of an engine while ensuring that the clutch electric actuator does not additionally expand the occupied space of the engine. The motorcycle engine comprises a machine case, a front cylinder body, a rear cylinder body, a clutch pull rod and an air filter, a clutch electric actuator used for driving the clutch pull rod to move is fixedly arranged outside the machine case, and an inwards-concave installation space is formed between the air filter and the top face of the machine case. The clutch electric actuator is positioned in the mounting space and is arranged in parallel with the rear cylinder body in the left-right direction; the clutch electric actuator comprises a motor and a transmission case, the motor is arranged in the front-back direction, the rear end of the motor is connected with the transmission case, and the front end of the motor extends to the position of the front cylinder body. By means of the design, the occupied space of the engine cannot be additionally enlarged, the compactness of the overall structure of the engine is guaranteed, and the balance of the engine can be improved.

This invention discloses a method for calculating and evaluating gear knocking on balance shaft scissor teeth, comprising the following steps: constructing a rigid model of an engine balance shaft system; performing mesh generation to obtain a finite element model; setting condensed nodes on the finite element model and coupling the condensed nodes with the contact boundaries; performing condensation processing on the finite element model and using the generated condensed model to replace the finite element model for mechanical analysis; making the gears flexible; applying excitations at various speeds on the crankshaft and starting simulation calculations; extracting the meshing force on the tooth surface of each gear pair at each speed; processing the meshing force data to obtain the peak meshing force, obtaining the impact index based on the peak meshing force, and obtaining the knocking evaluation based on the impact index. The method described in this invention can establish a fully flexible balance shaft system simulation model and quantitatively evaluate the knocking noise of balance shaft scissor teeth, providing a basis for the analysis and optimization of gear knocking problems on balance shaft scissor teeth.

The application provides a method for solving rough sound of an engine balance shaft, comprising the following steps: S1, performing NVH test on the engine to determine the approximate position of the rough sound source; S2, designing a cylinder cut-off test and canceling a balance shaft test for the engine to be tested to determine that the rough sound is caused by torsional vibration excitation; S3, establishing a CAE simulation analysis model capable of viewing torsional vibration of each position of a crankshaft, and using the established CAE simulation analysis model to perform cylinder cut-off simulation analysis on the engine to be tested to determine the influence of cylinder cut-off of each cylinder of the engine to be tested on the balance shaft excitation; and S4, replacing the installation position of the balance shaft on the crankshaft of the engine to be tested, and using the CAE simulation analysis model to analyze the rough sound of the balance shaft installed at different positions to determine the optimal installation position of the balance shaft which can generate the optimal rough sound.

The utility model discloses a marine closed steering engine main control valve group. The valve group comprises a valve block, and a special steering engine balance valve, an overflow valve, a one-way valve, a safety valve and a plate type ball valve which are arranged on the valve block, the balance valve, the overflow valve, the one-way valve, the safety valve and the plate type ball valve special for the steering engine are communicated with one another through hole channels in the valve block, the valve block further comprises a plurality of oil ports, the closed hydraulic system is connected with the valve block through the oil ports, and the valve set integrates the control function of the hydraulic steering engine and has the advantages of being high in integration degree, simple in structure, stable in action, high in reliability and the like. And stable operation of the steering engine in a marine environment is ensured.

The utility model discloses a two-stroke engine crankshaft balance shaft structure which comprises a crankshaft assembly and a balance shaft assembly, a driving gear used for driving the balance shaft assembly to rotate is arranged in the crankshaft assembly, and the balance shaft assembly comprises a rotating shaft. The driven gear is mounted at the end part of the rotating shaft, and the driven gear is meshed with the driving gear in the crankshaft assembly; the balance block is mounted at the end part of one end, far away from the driven gear, of the rotating shaft; the balancing weight is mounted on the side wall of the driven gear; the engine balance shaft assembly has the beneficial effects that the working effect of the balance shaft assembly can be ensured without arranging a plurality of balance blocks in the balance shaft assembly, so that the weight of the balance shaft assembly is reduced, and the weight of an engine is further reduced.

The utility model relates to the technical field of engine balance shafts, in particular to a high-strength engine balance shaft structure which comprises a shaft rod, a transmission gear is fixedly connected to the middle of the shaft rod in a sleeved mode, an eccentric block is fixedly connected to one end of the shaft rod in a sleeved mode, and a connecting sleeve is fixedly connected to the side, located on the transmission gear, of the outer side wall of the shaft rod in a sleeved mode. And one end of the connecting sleeve is fixedly connected with a pressurizing wheel. According to the utility model, through the arrangement of the pressurizing wheel and the outer shaft sleeve, when the shaft rod rotates, the shaft rod and the transmission gear drive lubricating oil in the cavity to rotate in the same direction, the shaft rod rotates to drive the pressurizing wheel to rotate, and through the arrangement of the blades on the pressurizing wheel, the lubricating oil in the liquid accumulation ring is pushed to one side where a rotor bearing is located when the blades revolve; meanwhile, the lubricating oil is driven to rotate, and the pressure of the lubricating oil on one side of the rotor bearing is increased, so that the lubricating oil enters the rotor bearing conveniently, and the rotor bearing is well lubricated.

The present invention belongs to the technical field of power monitoring for airborne electronic equipment, and provides a dynamic balancing method and system for an airborne turboprop engine. Aiming at the problems existing in the traditional method, such as being only able to conduct ground tests, unable to make the engine reach the optimal rotational speed and aerodynamic influence during engine operation, and unable to give the predicted result of the engine vibration after balancing according to the vibration before engine trimming and the trimming scheme, an airborne dynamic balancing scheme is proposed. It can realize the detection of engine vibration in the air and the recording of vibration data, complete the calculation and trimming work on the ground, ensure that the vibration parameters are in a long-term and stable state of the engine, minimize the mechanical fatigue and damage caused by engine vibration to the greatest extent, and at the same time, be able to evaluate the vibration after engine balancing according to the engine vibration data and the actual trimming scheme, reducing the number of engine test runs.

The invention discloses a methanol engine balance shaft installation detection method and a detection tool thereof, and belongs to the technical field of engine assembly. The method comprises the following steps: processing a positioning pin hole in an engine cylinder body, and processing a positioning hole for measurement in a balance shaft; grading the distance from the bottom surface of the cylinder body to the main shaft hole of the cylinder body, the distance from the axis of the balance shaft to the mounting surface and the thickness of a gasket, and selecting the cylinder body, the balance shaft and the gasket for assembly; measuring the distance between the crankshaft axis and the balance shaft axis by using a detection tool; the operation test is carried out on an engine assembly test bench, the vibration performance of an engine is monitored through a vibration sensor, and a second-order vibration component corresponding to the balance shaft is separated and analyzed. Through a three-dimensional space positioning reference system formed by the cylinder body positioning pin hole and the positioning hole for measuring the balance shaft, the coaxiality error of the axis of the balance shaft and the axis of the crankshaft is reduced, the second-order vibration suppression efficiency is improved, and abnormal vibration excitation caused by axis deviation is remarkably improved.

The present invention relates to an aircraft balance parameter adjustment test bench and its parameter adjustment method, comprising an upper turbojet engine mounting platform, a central telescopic support and a spherical node, and a bottom hemispherical support. The upper turbojet engine mounting platform is elastically connected to the central telescopic support and the spherical node via a connecting spring, and is slidably connected to a support slide groove via a hydraulic telescopic rod. The central telescopic support and the spherical node are slidably connected to the bottom hemispherical support via a disk limiter and a hollow cylindrical force measurement limiter. A BP neural network model is used to adjust the test bench's angle control PID parameters and length control PID parameters in real time, changing the lengths and angles of the four hydraulic telescopic rods to achieve turbojet engine balance. Furthermore, the total lift and thrust data of each turbojet engine are integrated to optimize the turbojet engine control PID parameters, thereby meeting the requirements of turbojet engine aircraft testing and application. This simplifies operation, improves efficiency, and reduces costs while ensuring personnel and equipment safety.

The utility model discloses engine balance box assembling equipment which comprises a machine frame and a chain conveyor erected on the machine frame, and an operation tool which is used for assembling all parts of an engine balance box and serves as an assembling operation platform is arranged on the machine frame in a driving and sliding mode through the chain conveyor. A balance shaft grabbing mechanism, a phase detection mechanism, a marking mechanism, a bolt feeding mechanism and a tightening assembly mechanism are sequentially arranged on the rack in the conveying direction of the chain conveyor, and the whole assembly process that a balance shaft of an engine balance box is placed to a box body to be assembled is achieved. The limiting assembly is used for limiting and stopping when the operation tool arrives at the position of the corresponding assembling mechanism, and the supporting assembly is used for fixing and shoring when the operation tool is assembled so that the operation tool can be separated from the chain conveyor. Each assembly step of the engine balance box is completed step by step at a corresponding station, so that the uninterrupted assembly operation is ensured, the production efficiency of the engine balance box is greatly improved, the automation degree is high, and the labor intensity of workers is reduced.

This utility model discloses a motorcycle engine balancing driven gear structure, including a driven gear and a secondary gear. The driven gear has several first grooves, and the secondary gear has several second grooves. The first and second grooves correspond one-to-one, and two corresponding grooves fit together to form a receiving cavity, within which a buffer element is provided. The first grooves and the corresponding second grooves are in clearance fit. A central shaft is provided on the driven gear, and the secondary gear is mounted on the central shaft. The driven gear and the central shaft are an integral structure. The advantages are: compared to traditional balancing driven gear structures, this solution uses more streamlined assembly components and a clever assembly arrangement. When gear meshing impact occurs, the instantaneous impact energy can be converted into controllable elastic deformation energy, thereby reducing vibration and noise, achieving system protection and improved stability.

The invention discloses a motorcycle engine double-balance-shaft structure which comprises a box body, a crankshaft is rotatably connected in the box body, the crankshaft drives a balance shaft I to rotate through a main driving gear and a balance shaft I driven gear, a cylinder head is arranged above the box body, an air inlet cam shaft and an exhaust cam shaft are arranged in the cylinder head, and the air inlet cam shaft and the exhaust cam shaft are arranged in the box body. The crankshaft drives the air inlet cam shaft and the exhaust cam shaft to rotate through the chain and the timing chain wheel, the air inlet cam shaft drives the balance shaft II driven gear to rotate through the balance shaft II driving gear, and the balance shaft II driven gear is arranged on the balance shaft II. The invention belongs to the field of engine balance mechanisms, and particularly relates to a double-balance-shaft structure of a motorcycle engine. Double balance shafts are arranged in limited spaces of all parts of the engine, inertia force and torque generated by movement of the engine are balanced, and therefore vibration of the whole engine is reduced.

The utility model discloses an engine balance shaft positioning tool which comprises a bottom plate, a stable clamping mechanism, a pressing block quick-changing mechanism and a clamping auxiliary mechanism, and the stable clamping mechanism comprises a sliding rail, a sliding block, a driving motor, a driving rod, a driven rod and a pressure spring frame. The pressing block quick-changing mechanism comprises a longitudinal plate, a clamping pipe, a clamping rod, a gradient groove, a rotating disc, a clamping groove, a locking rod and a pressing block, the stable clamping mechanism ensures that the balance shaft body is stably clamped on the containing plate, vibration and looseness are reduced, the operation precision and reliability are improved, the pressing block quick-changing mechanism achieves quick mounting and dismounting of the pressing block, and the service life of the balance shaft body is prolonged. The operation process is simplified, the replacement efficiency is improved, the clamping auxiliary mechanism assists rotation of the rotary disc, the stretching-in process of the lock rod and the fixing process of the clamping rod are smoother, and the operation convenience is improved.

The application provides an engine balance shaft steel and a preparation method thereof. The engine balance shaft steel comprises the following components in percentage by mass: C 0.44-0.46wt%, Si 0.25-0.35wt%, Mn 0.80-0.90wt%, P≤0.015wt%, S 0.010-0.025wt%, Al 0.015-0.025wt%, Cr 0.10-0.15wt%, and the balance is Fe and inevitable impurities. The engine balance shaft steel is prepared by using blast furnace molten iron with specific chemical components and content, through the molten iron pretreatment, converter smelting, ladle refining, vacuum degassing, continuous casting and rolling process, the engine balance shaft steel with high strength and high plasticity is obtained, wherein the tensile strength is greater than or equal to 710 MPa, the yield strength is greater than or equal to 400 MPa, the elongation after fracture is greater than or equal to 18%, and the reduction of area is greater than or equal to 47%.

The utility model discloses a shaping die for an engine balance shaft. The shaping die comprises a rack; a first shaping lower cavity and a second shaping lower cavity are formed in the top surface of the lower die holder; a first shaping upper cavity and a second shaping upper cavity are formed in the bottom surface of the upper die base, the structure and the size of the first shaping upper cavity are the same as those of the second shaping lower cavity, and the structure and the size of the second shaping upper cavity are the same as those of the first shaping lower cavity; and a die assembly. In the reshaping die for the engine balance shaft, the first reshaping upper cavity and the first reshaping lower cavity as well as the second reshaping upper cavity and the second reshaping upper cavity can be simultaneously and respectively combined to form two reshaping cavities, the first reshaping upper cavity and the second reshaping lower cavity are the same in structural size, and the first reshaping lower cavity and the second reshaping upper cavity are the same in structural size; by means of the arrangement, the blanks are shaped twice, the placing angles of the blanks are different, the blanks can be evenly distributed in the shaping cavity, the blanks are evenly formed, defects are reduced, the unevenness is reduced, and then the product quality is improved.

The utility model provides a balance shaft noise detection device, and belongs to the technical field of mechanical tests. The balance shaft noise detection device comprises a test assembly and a fixed assembly, the fixed assembly is divided into a wind breaking part and a movable part, the test assembly is arranged in the fixed assembly, and the test assembly is divided into two test paths of an exterior line and an interior line to synchronously test noise of a balance shaft in a front cover and noise in a carriage. The fixing assembly is used for installing and fixing the device outside the vehicle during motion testing. According to the utility model, noise monitoring analysis can be simultaneously carried out near an engine balance shaft in a front cover and in a carriage, the front cover and a vehicle door are sealed under extrusion protection of vehicle exterior lines and vehicle interior lines, internal noise dissipation and external interference are prevented, external protection can be carried out on a test instrument, and the test efficiency is improved. And the device can be conveniently protected and fixed in an outdoor test state.

The utility model discloses a balance shaft of a motorcycle engine, which relates to the technical field of motorcycles, and is characterized in that two ends of the balance shaft are respectively inserted into inner rings of two balance shaft bearings in a clearance fit manner, and when the balance shaft rotates, the two ends of the balance shaft and the inner rings of the balance shaft bearings can generate relative rotation; therefore, the lateral thrust of the balance shaft acts on different points of the inner ring of the balance shaft bearing. The service life of the balance shaft bearing can be prolonged.

The present invention specifically discloses a balanced gas injection valve for a marine gas engine, comprising a solenoid valve, a valve housing, and a valve core assembly; the valve core assembly comprises an armature, a moving sealing diaphragm, an O-ring, a travel limiter, a return spring, a valve disc, a hexagon socket head screw, a limiter ring, a T-shaped pressure cylinder, and a valve seat; through holes 1, 2, and 3 are respectively provided at the center axes of the three parts, namely, the armature, the hexagon socket head screw, and the valve seat, and the through holes 1, 2, and 3 connect the core cavity with the back pressure point. When the gas injection valve is opened and closed, the two ambient gases in the core cavity and the back pressure point can flow smoothly and maintain the consistency of the gas pressure, thereby reducing the valve disc opening resistance and increasing the working pressure difference, thereby achieving a power increase for the engine under the same model of gas injection valve; the metal-non-metal contact seal adopted between the valve disc and the valve seat can achieve minimal or even zero leakage, and can be adapted to new energy fuel injection systems such as hydrogen.

The invention relates to the technical field of engines, in particular to an engine balance shaft and an engine. The invention provides an engine balance shaft which comprises a balance shaft body, a first adjusting mechanism and a second adjusting mechanism, the first adjusting mechanism comprises a mounting body, a first adjusting part and a second adjusting part, the mounting body is connected to the balance shaft body, the first adjusting part is slidably connected to the balance shaft body, and the second adjusting part is slidably connected to the mounting body. The second adjusting piece is slidably connected to the mounting body, is provided with a plurality of eccentric block mounting positions and is used for adjusting the eccentric blocks to be close to or away from the balance shaft body in the radial direction of the balance shaft body; the second adjusting mechanism is connected to the first adjusting piece and used for adjusting the position of the first adjusting piece in the axis direction of the balance shaft body. The eccentric block can be accurately adjusted to each position of the balance shaft, so that the adjustment of the eccentric block of the balance shaft is more accurate, different vibrations can be effectively inhibited, and overhaul and maintenance are facilitated.

This application provides an engine misfire detection method and device, applicable to the automotive field. The method comprises: collecting an engine speed signal; transforming and processing the speed signal to obtain unbalanced angular momentum of each cylinder in the engine, resulting in unbalanced angular momentum fluctuations; and determining whether a misfire has occurred in the corresponding cylinder based on each unbalanced angular momentum. When a misfire occurs in one or more cylinders, the overall engine balance is disrupted, and the speed exhibits periodic fluctuations. The angular momentum fluctuations can be used to determine which cylinder is causing the abnormal work. Using the angular momentum fluctuations as a detection indicator, the method avoids the influence of engine speed, gear position, and load on the detection results, significantly improving detection accuracy.

The utility model discloses a balance shaft gear of a motorcycle engine, and relates to the technical field of balance shaft gears of motorcycle engines. The transmission mechanism comprises a balance shaft, a driven gear assembly, a driving gear and a crankshaft assembly, the cylindrical damping rubber block is arranged between the balance gear center sleeve piece and the balance shaft driven gear, so that the balance shaft driven gear plays a role in damping and buffering under the condition that the balance shaft driven gear is subjected to impact force during speed change after rotation; the damping pressure spring is arranged between the balance gear center sleeve piece and the balance shaft driven gear to play a counter-acting force to push the balance shaft driven gear to reset, and flexible meshing plays a role in reducing noise; the elastic washer and the flat washer are installed between the balance gear center sleeve piece and the balance shaft driven gear, friction and hard collision between the two parts are reduced, and the elastic washer and the flat washer are used for achieving the anti-loosening effect after the balance shaft and the driven gear assembly are fastened with the balance shaft right balancing weight.

The present invention provides a method and test system for calculating the thrust coefficient of a throat-bolt nozzle, primarily addressing the problem of accurately measuring the thrust coefficient of a pintle nozzle under different operating conditions. Based on a throat-bolt nozzle test model, the present invention calculates the corresponding thrust coefficient at a specified combustion chamber pressure using the engine equilibrium pressure calculation formula. The test system, employing this method, includes an engine combustion chamber, an ignition device, a servo control system, a sealed connection structure, a static frame, a dynamic frame, a thrust sensor, and a bearing block. During testing, the engine's combustion chamber pressure and throat area can be precisely controlled, resulting in the nozzle thrust coefficient under the desired operating conditions.

The application discloses a motorcycle engine balance shaft damping and anti-loose washer locking structure and belongs to the technical field of motorcycle engine balance shaft damping, which comprises a balance shaft, a bearing, a shaft sleeve, a key, a gasket, a special-shaped gasket, an anti-loose washer, a nut and a balance shaft gear assembly. The balance shaft gear assembly comprises a balance shaft gear, a bushing, springs and cylindrical pins. In the application, when the engine runs at high speed, the six springs and the three cylindrical pins in the balance shaft gear assembly can effectively buffer and absorb the instantaneous impact of the crankshaft transmitted to the balance shaft, greatly reduce the vibration and impact load caused by rigid transmission, reduce the stress abrasion of the balance shaft, and significantly improve the smoothness of the engine operation. Meanwhile, the lugs of the anti-loose washer are directly inserted into the balance shaft key groove to realize circumferential locking, which can effectively prevent the anti-loose washer and the nut from rotating and loosening, significantly enhance the locking force and fastening reliability of the nut, and avoid transmission failure caused by nut loosening.