293results about "Inertia force compensation" patented technology

The invention relates to a self-resetting variable-stiffness vibration double-control damper suitable for supporting column type electrical equipment and application of the self-resetting variable-stiffness vibration double-control damper, and belongs to the technical field of vibration double control of the electrical equipment. In order to solve the problems that an existing damper is single in function and the like, the damper comprises an outer cylinder, an inner cylinder, an energy dissipation inner rod and an energy dissipation mechanism, the outer cylinder is of a two-section type splicing structure, the inner cylinder is coaxially arranged in the outer cylinder in a sleeved mode and connected with the outer cylinder through a first fastener, and the bottom of the inner cylinder is aligned with a splicing seam of the outer cylinder; the energy consumption inner rod is arranged in the outer cylinder in a penetrating mode, one end of the energy consumption inner rod extends out of the outer cylinder, the energy consumption mechanism is arranged in the outer cylinder, the energy consumption mechanism is distributed on the periphery of the energy consumption inner rod in the length direction of the energy consumption inner rod, high energy consumption capacity and reset capacity are achieved, variable-stiffness vibration double control and self-reset can be conducted, the safety of electrical equipment is improved, and residual deformation is reduced; a design method and a safety monitoring method are provided for the damper, the design efficiency and accuracy are improved, and safe and stable operation of equipment is ensured.

The invention discloses a bridge electromagnetic inertial mass hybrid control damping system and an overall hybrid control method. The damping system comprises an inertial mass assembly, an electromagnetic assembly, a rigidity assembly and a corresponding parameter adjusting circuit. Wherein the ball screw system is used for converting linear translation into rotation, the inertial mass assembly is used for providing acceleration type inertial mass damping, the electromagnetic assembly is used for providing speed type electromagnetic damping, and the rigidity assembly is used for providing rigidity. In a normal operation stage, a parameter adjusting circuit is utilized, and the purpose of adjusting electromagnetic damping and rigidity values is achieved by changing circuit input, so that semi-active tuning is realized; under the action of an earthquake, circuit input is fixed, so that parameters of the damper are constant, and the anti-seismic robustness of the damper can be improved.

The invention belongs to the technical field of vibration control, and discloses a tuned mass damping device for controlling low-frequency vertical bending vortex vibration of a large-span bridge, which consists of a fixed pulley, a mass block, a high-strength light force transmission cable, a spring, a hanging ring and a damper. Fixed pulleys and mass blocks are arranged at the positive and negative maximum displacement positions of a longitudinal bridge direction mode of a main beam respectively, a suspension system is formed by a full-length force transmission cable, and the gravity of the two mass blocks is basically balanced; the mass block is connected through the spring and is close to the bridge vibration control target frequency. When the bridge vibrates, the two mass blocks generate inertia forces which are opposite in direction but overlapped with each other, the driving system and the bridge form resonance, and therefore bridge vibration is effectively restrained. The gravity of the mass block can be self-balanced, the strength and the number of the springs are greatly reduced compared with those of a traditional TMD, any low-frequency tuning can be conducted in a vertical limited space, and the engineering cost is remarkably reduced. The device can be used for controlling vertical bending and torsional vibration of various engineering structures; the damper is replaced by an actuator, so that active control can be realized or the damper can be used as a structural excitation device.

Engine (1) comprising a crankshaft (10) positioned in a cylinder block (3) of the engine (1), wherein the crankshaft (10) at one end has a flywheel flange (12) for attaching a flywheel (8) and a number of counterweights for providing dynamic balancing of the crankshaft (10) in use, comprising an end counterweight (11) positioned very close to an end wall (3e) of the cylinder block (3), wherein the end counterweight (11) has a recess (11r) formed therein in which a sensor wheel (20) is mounted, wherein the sensor wheel (20) is stamped from a single piece of steel and a middle circular section (21) and comprising a folded-over cylindrical rim section (24), wherein the folded-over cylindrical rim section (24) is arranged around an outer circumference of the middle circular section (21), extends away from one end wall (3e) of the cylinder block (3), has an inner radius that is large enough to allow the cylindrical rim section (24) to fit over the end counterweight (11) when the encoder wheel (20) is mounted on the crankshaft (10), and having several circumferentially spaced encoder gear teeth (26), wherein there are a number of circumferentially spaced openings (25) in the folded cylindrical rim section (24) and each of the encoder gear teeth (26) is formed by a web between two adjacent openings (25) in the folded cylindrical rim section (24), which thus forms a cage-like structure, and wherein the central circular section (21) a central opening (22) with a diameter large enough to allow the encoder wheel (20) to be mounted past the flywheel flange (12), and a number of compensating openings (23) formed therein to move a center of mass of the encoder wheel (20) away from an axis of rotation of the encoder wheel (20), wherein the compensating openings (23) of the central circular section (21) of the encoder wheel (20) are arranged at an angle and the encoder wheel (20) has an unbalance mass which, in conjunction with the arrangement of the compensating openings (23), compensates for an unbalance effect of the material lost from the end counterweight (11) due to the recess (11r).

The invention relates to the technical field of vibration control, and particularly provides an ultralow-frequency passive self-adaptive tuning vibration absorber based on a string-mass system, which comprises a mechanical sensing assembly, a mechanical driving assembly, a mechanical transmission assembly and a tuning vibration absorption assembly which are arranged on a target structure, the mechanical sensing assembly and the mechanical driving assembly are correspondingly arranged, and the mechanical sensing assembly is used for sensing vibration of a target structure and can generate relative movement; the mechanical driving assembly is connected with the mechanical transmission assembly, and the mechanical driving assembly drives the mechanical transmission assembly to work based on relative motion generated by the mechanical sensing assembly; the mechanical transmission assembly is connected with the tuning vibration absorption assembly. The vibration absorber is wide in application range, compared with an existing self-adaptive tuning vibration absorber, the vibration absorber has the advantages that external power supply driving is not needed, the structure is simple, ultralow-frequency vibration control can be achieved, and effective control over broadband even multi-order modal vibration is achieved through a pure mechanical structure.

A composite damping device for vibration reduction of a tower drum and blades of an offshore wind turbine belongs to the technical field of vibration reduction of wind driven generators, and is characterized by comprising a blade integration unit and a tower drum tuning unit, the blade integration unit adopts a cylindrical particle damping cavity, the center of the cylinder is connected with a mass ball through a spring, and the cavity is filled with damping particles; the steel wire rope is fixed in the blade to restrain vibration displacement; the tower tube tuning unit is connected with the mass block through a steel wire rope, the mass block is circumferentially provided with the springs and connected with the tower tube wall, the lower portion of the mass block is connected with the mass ball, and the upper periphery and the lower periphery of the mass block are connected with the tower wall through the hydraulic inerter dampers. And the working space is obviously reduced, the multi-direction vibration control capability is improved, and the method is suitable for vibration control of offshore wind turbine towers and blades.

A power transmission device includes an inertia ring, a plate, a plurality of first bolts, a torque transmission member, and a plurality of second bolts. The inertia ring has an annular shape. The inertia ring includes a plurality of through holes. The plurality of through holes are disposed at intervals in a circumferential direction. The plate is disposed on a first side with respect to the inertia ring in an axial direction. The plurality of first bolts are screwed into the plurality of through holes from the first side to fasten the plate to the inertia ring. The torque transmission member is disposed on a second side with respect to the inertia ring in the axial direction. The plurality of second bolts are screwed into the plurality of through holes from the second side to fasten the torque transmission member to the inertia ring.

The adjustable inertia connecting rod vibration isolation device comprises a vibration isolation base, a vibration isolation platform, a connecting rod mechanism and a spring element, the connecting rod mechanism comprises two sets of connecting rod assemblies which are in bilateral symmetry, each connecting rod assembly comprises an upper connecting rod and a lower connecting rod, and the upper connecting rods and the lower connecting rods are hinged through bearings; each connecting rod assembly is connected with the vibration isolation platform and the vibration isolation base through bearings. The spring element comprises a compression spring and an extension spring, and the compression spring is vertically arranged between the vibration isolation base and the vibration isolation platform; the extension spring is horizontally connected with bearing joints of the left and right symmetrical connecting rod assemblies; an upper connecting rod and a lower connecting rod of the connecting rod assembly extend outwards along a connecting point to form a lever arm, a plurality of mass block mounting holes are formed in the tail end of the lever arm, and mass blocks with different masses can be detachably mounted. A parallel stiffness structure is formed through the compression spring and the extension spring, the mass size and the mounting position of the mass block are adjusted on the lever arm, and ultralow-frequency quasi-zero stiffness band gap vibration isolation is cooperatively achieved.

The invention discloses a vibration motor crankshaft vibration device and a wind power coal picker comprising the same, and relates to the technical field of mining equipment.The vibration motor crankshaft vibration device comprises a main shaft, a main middle section, a main eccentric section, a main transition section, a crank section and a main tail section from the middle to the two ends; the first shaft ends are fixedly arranged at two ends of the main shaft and are eccentrically arranged; the auxiliary shaft comprises an auxiliary middle section, an auxiliary eccentric section and an auxiliary tail section from the middle to the two ends; the second shaft ends are fixedly arranged at the two ends of the auxiliary shaft and are eccentrically arranged with the auxiliary shaft; the main eccentric block is fixedly arranged on the main eccentric section; the auxiliary eccentric block is fixedly arranged on the auxiliary eccentric section; driving gears are mounted at the end parts of the first shaft end and the second shaft end of the transmission shaft; the driving shaft is fixedly arranged at the end part of the transmission shaft and is used for driving the motor; the rocker arm connecting rod is rotationally connected to the crank section; the vibration motor has the effect of prolonging the service life of the vibration motor for mineral screening, so that the probability of maintenance and failure of the coal separator is reduced, and the coal separation yield and the production efficiency are improved.

The invention relates to a balancing shaft, comprising:-an unbalanced shaft (1), which has a centre of gravity (9) spaced apart from the axis of rotation (8) thereof, which centre of gravity forms an unbalance plane (10) with the axis of rotation, and which has a bearing journal (6, 7), which has an only partially cylindrical circumference, the cylindrical partial circumference (11) of the bearing journal is oriented unbalanced towards the shaft,-a bearing ring (13) surrounding the bearing journal, which bears against the cylindrical partial circumference and defines a free space together with a bearing journal back (12) radially opposite the cylindrical partial circumference, and-a leaf spring (14), the leaf spring is tensioned in the free space on the one hand against the back of the bearing journal and on the other hand against the bearing ring, and the bearing ring is tensioned radially against the cylindrical partial circumference, characterized in that the leaf spring is tensioned against two bearing points (20, 21) of the back of the bearing journal, the two bearing points extend on both sides of the imbalance plane and the orthographic projections of the two bearing points on the imbalance plane extend on the same side of the axis of rotation with respect to the center of gravity.

A load device assembly includes: an idler gear that rotates in conjunction with the rotation of a power gear of the internal combustion engine; a driven gear that rotates by receiving a rotational force of the power gear via the idler gear, the idler gear being arranged between the driven gear and the power gear; and a load device that rotates together with the driven gear. Compared with the first inertia by a first mass required at least for the rotation of a shaft serving as a load of the power gear, the inertia of the driven gear and the shaft is set as a second inertia larger than the first inertia, the second inertia being made larger to approximate the inertia of the power gear. The idler gear has openings.Third inertia caused by the rotation of the idle gear is less than fourth inertia when the orifices are not present.

Vibration is detrimental to an internal combustion engine and its mounting system. It can damage internal parts, attached accessories, and mounting fixtures. Vibration can also cause discomfort to vehicle occupants or equipment operators. Managing, reducing, or eliminating vibration often involves additional cost in the design and manufacture of an engine and / or its mounting system. The subject invention is a unique arrangement of the cylinders of an eight-cylinder internal combustion engine that completely balances the forces produced by the eight pistons. Vibration due to piston motion is eliminated without the use of additional internal balancing devices. Special mounting structures are no longer necessary. This arrangement can be used with equal success in air compressors, liquid pumps, external combustion engines, or any other device using the familiar piston / connecting rod / crankshaft mechanism and requiring eight cylinders.

The invention relates to a rotatable component, a tool and a method for manufacturing a rotatable component. The rotatable component comprises a wall (3), which has an inner rotating surface (4) or inner peripheral surface (5) passed through by a central longitudinal axis (Z4) in the longitudinal direction (L) and an outer rotating surface (6) or outer peripheral surface passed through by a central longitudinal axis (Z6) in the longitudinal direction (L) and arranged on the circumference of the inner rotating surface (4) or inner peripheral surface (5), wherein the central longitudinal axes (Z4, Z6) are offset relative to each other by a distance (D) in the radial direction (R) and / or the wall (3) has at least one wall notch (40) and / or at least one wall thickening (42), whereby the wall (3) does not have rotational symmetry.

The utility model discloses a torque limiter, a torsion damper and a vehicle, the torque limiter comprises a first cover plate, a second cover plate, a pressure plate and a friction disc assembly, and the first cover plate, the second cover plate, the pressure plate and the friction disc assembly are all annular pieces; a first space is formed between the first cover plate and the second cover plate, and part of the pressure plate is arranged in the first space; a first annular protrusion protruding towards the second cover plate and extending in the circumferential direction of the pressing plate is arranged at the radial inner end of the pressing plate, and a second annular protrusion protruding towards the pressing plate and extending in the circumferential direction of the second cover plate is arranged at the radial inner end of the second cover plate. The second annular protrusion and the first annular protrusion are oppositely arranged and define a second space between the pressing disc and the second cover plate. At least part of the friction disc assembly is arranged in the second space and arranged on the first annular protrusion and the second annular protrusion in a sleeving mode. According to the torque limiter, the anti-rust effect of the friction surface of the friction disc assembly is improved, and the anti-rust cost is reduced.

The present application provides a scroll compressor, which comprises a housing, a scroll mechanism, a motor driving the scroll mechanism through a driving shaft, and a bearing seat in which a first bearing and a second bearing are arranged and which are arranged on one side of the motor in an axial direction to support the driving shaft, wherein the motor and the bearing seat are accommodated inside the housing, and the scroll compressor further comprises a first balance block matched with the driving shaft, and the bearing seat, the first bearing and the second bearing constitute a first cavity in which the first balance block is located. According to the present application, the load on the bearing of the scroll compressor is significantly reduced, thereby prolonging the service life of the bearing and the compressor.

The utility model discloses a compact high-performance parallel double-cylinder engine, which comprises an engine main body, a crankshaft assembly and a speed change assembly are symmetrically arranged in the engine main body, and a balance shaft assembly connected with the crankshaft assembly is arranged in the engine main body between the crankshaft assembly and the speed change assembly. A cylinder head is arranged at the top of the engine body, an air inlet assembly and an exhaust assembly are arranged on the cylinder head, a piston assembly connected with the crankshaft assembly is arranged in the cylinder head, a first transmission wheel and a second transmission wheel are rotationally arranged on the side wall of the engine body, the first transmission wheel is connected with the crankshaft assembly, and the second transmission wheel is connected with the second transmission wheel. The first transmission wheel is connected with a driving shaft in the speed change assembly, the second transmission wheel is connected with a driving shaft in the speed change assembly, and meanwhile the first transmission wheel and the second transmission wheel are sleeved with the transmission belt, so that the engine has the beneficial effects that the occupied space of the engine during installation is reduced, and the compactness of the engine is guaranteed.

A vibration control assembly includes a housing having an interior region and an inner mass including a cage disposed within the interior region of the housing and being rotatable within the housing about a first axis and a gyroscope wheel disposed within the cage and rotatable about a second axis other than the first axis. At least one driving source includes a stator and is operable to interact with a magnetic field of the inner mass to drive rotation of the inner mass about at least one of the first axis and the second axis, wherein the at least one driving source is mounted within the interior region of the housing.

The balancer device includes: an idler shaft having an idler sprocket around which a drive chain is wound, and an idler gear integrated with the idler sprocket; and a balancer housing accommodating, thereinside, balancer shafts generating a vibratory force by the rotation force transmitted from the idler gear. The balancer housing includes: a support part which is provided on the outer part of an upper housing, and supports an end portion of the idler shaft; a boss portion which is provided at a position away from the support part; and a first reinforcing part and second reinforcing part which are disposed between the support part and the fixing portion to reinforce the lower part on the lower housing side of the support part. Consequently, it is possible to suppress the occurrence of noise and vibration between an idle gear and a drive side gear.

To efficiently dissipate air bubbles included in oil circulating within an internal combustion engine.SOLUTION: An internal combustion engine includes: an oil storage part in which a suction part of oil to be supplied to each part of an internal combustion engine body is disposed; an oil flow passage in which air bubble-containing oil to be returned from each part of the internal combustion engine body to the oil storage part flows; and a high pressure part to which the oil is supplied, in which pressure becomes higher than the atmospheric pressure and that has an oil injection hole for injecting the oil toward the air bubble-containing oil flowing in the oil flow passage.SELECTED DRAWING: Figure 1

A method for active vibration control system (AVCS) monitoring and control is disclosed. The method comprises receiving inputs to a protection monitor to monitor one or more force generators, comparing the inputs to one or more values, and shutting down or adjusting the one or more force generators if the one or more force generators are determined to be operating at an undesired condition.

The invention relates to a balancing shaft and to a method for producing same. The balancing shaft comprises: - an unbalanced shaft (1) comprising an end-side drive journal (2), end-face centering bores (16, 17) and a bearing journal (3, 4), the periphery of which is merely partially cylindrical, - and a bearing ring (12) which encloses the bearing journal, and an inner radius RL of which rests against the cylindrical partial periphery (8) of the bearing journal, the inner radius RL of the bearing ring being greater than the minimum-circumscribed-circle radius rz of the bearing journal. The minimum circumscribed circle (C) of the bearing journal is concentric with the centering bores, the drive journal being eccentric with respect to the centering bores by the difference between radii RL - rz, and being concentric with the bearing ring.

The utility model relates to the technical field of engines, in particular to a balance block, a crankshaft and an engine, the balance block comprises a main body part and a wind breaking part, the main body part is of a fan-shaped annular structure, and in the radial direction of the main body part, the thickness of the main body part is gradually reduced from one end close to the circle center of the fan-shaped annular structure to one end far away from the circle center; the wind breaking part is arranged at at least one end of the main body part and extends in the radial direction of the main body part, the wind breaking part is provided with a large end and a small end, in the circumferential direction of the main body part, the large end is connected with the end of the main body part, and the small end is located at the end, away from the main body part, of the wind breaking part. The thickness of the main body part is gradually reduced from the end close to the circle center in the radial direction to the end away from the circle center, so that the windward area is reduced, the wind breaking part is arranged at the end of the main body part and provided with the large end and the small end, and the small end is located at the end, away from the main body part, of the wind breaking part, so that the wind resistance coefficient is reduced, and finally the air resistance is reduced. Therefore, energy loss is reduced.

The utility model discloses a diaphragm pump structure capable of adjusting dynamic balance, which comprises a crankshaft comprising a first shaft section and a second shaft section, the crankshaft is provided with a shaft hole along the axial direction of the crankshaft, the center line of the shaft hole is parallel to and does not coincide with the center line of the first shaft section, and the center line of the shaft hole is coincide with the center line of the second shaft section; the motor shaft penetrates through the crankshaft through the shaft hole, and the motor shaft is fixedly connected with the crankshaft; the first shaft section is sleeved with the crank support, and the first shaft section is connected with the crank support through a bearing; the diaphragm assembly is arranged on the crank bracket; the balance sleeve is arranged on the second shaft section in a sleeving manner; and the balancing weight is detachably locked on the balancing sleeve. According to the diaphragm pump structure capable of adjusting the dynamic balance, when the external load of the diaphragm pump changes, different configurations can be achieved by replacing the balancing weights with different loads, manual adjustment of the dynamic balance is completed, inertia force of rotating components is offset, the diaphragm pump achieves the optimal dynamic balance, and the vibration amplitude is reduced.

To allow for easy adjustment of the crankshaft balance without removing the crankshaft itself. [Solution] In an auxiliary machine (62) that is coaxially connected to a crankshaft (41) supported by a crankcase (31) and rotates together with the crankshaft (41), a first transverse hole (62k) is provided on the outer circumference (62g) of the auxiliary machine (62) on the crankshaft support portion (48L) side of the crankcase (31), with the crankshaft support portion (48L) provided on the crankcase (31) in between, and extending in the axial direction of the crankshaft (41) at a circumferential spacing, and an adjustment weight (97) is selectively inserted into the first transverse hole (62k).

The invention discloses a self-oil-return cover plate of a balance shaft seat, and relates to the technical field of engines. An oil return hole is formed in the containing box, one end of the oil return hole extends to the position between the first cover plate and the containing box, and the other end of the oil return hole extends into the containing box. Lubricating oil entering the space between the first cover plate and the containing box can flow back into the containing box along the oil return hole. According to the self-oil-return cover plate of the balance shaft seat, due to the fact that the oil return hole is adopted to replace a traditional connecting pipe to serve as an oil return mechanism of the balance shaft seat, the technical problems that an existing balance shaft seat cover plate is not provided with an oil return structure, each cover plate needs to be externally connected with an oil return pipe, the structure is complex, parts are redundant, and cost is increased are effectively solved; and meanwhile, due to the simplification of the oil return mechanism, the connection of the two ends of the oil pipe is reduced, and the oil leakage risk of the connection points of the two ends of the oil return pipe of each shaft seat is also reduced.

The utility model belongs to the technical field of compressors, and particularly discloses a crankshaft dynamic balance counterweight assembly, a compressor and refrigeration equipment, the crankshaft dynamic balance counterweight assembly comprises a crankshaft, a first balancing weight, a second balancing weight, a balancing block and a positioning column, the first balancing weight is detachably connected with a crank, the second balancing weight is detachably connected with an eccentric shaft, and the balancing block is detachably connected with the crankshaft. And different counterweights can be conveniently replaced for testing in the dynamic balance checking process. The balancing block is connected with the second balancing weight in a sliding mode, the balancing block can be kept static relative to the second balancing weight through the positioning columns arranged on the two sides of the balancing block, and the balancing weight can be finely adjusted by adjusting the balancing block and the positioning columns. In addition, the crankshaft dynamic balance counterweight assembly is high in part universality, and diversified crankshaft balancing schemes can be provided for compressors of different models.

Provided is a balancer device including: a pair of balancer shafts 12, 13 respectively having first and second counter weights 31, 32 and first and second counter weights 33, 34 for generating an excitation force by a rotational force transmitted from an internal combustion engine; and a balancer housing 11 having a housing chamber 11a in which the pair of balancer shafts are rotatably housed. The balancer housing has a lower housing 16 and an upper housing 17. On opposed inner surfaces of both side walls 20, 20 of at least the upper housing, projection parts 38 are provided, of which tip parts 28a project toward recessed parts 31a, 32a provided in recessed shapes in the radial direction of the counter weights 31, 32. With this configuration, it is possible to suppress an increase in size while increasing the rigidity of the housing of the balancer device.